BMW K bikes (Bricks)


You are not connected. Please login or register

Go to page : 1, 2  Next

View previous topic View next topic Go down  Message [Page 1 of 2]


1Back to top Go down    hi there folks on Mon Feb 09, 2015 8:28 pm

wibblewobble

avatar
active member
active member
Hi, Im Nathan and I own a 1986 BMW K100- not sure which variant it is but it has given me 6 months of enjoyable trouble free motoring until today. I was wondering if I could get some help with it. Its my first big bike after passing my test and was just purchased as something to reliably and comfortably do a bit of distance on.



My real passion is for small 2 strokes so I also own this:


and this:

    

2Back to top Go down    Re: hi there folks on Mon Feb 09, 2015 8:42 pm

brickrider

avatar
Life time member
Life time member
Welcome to the forum Nathan. You seem to have done a good job nailing down the extremes of motorcycling -- very light to quite heavy. Enjoys them all! You suggest you need some help, but offer no specific problem with the bike. In the event you merely need to be sure the maintenance is current on your newly acquired machine, there are plenty of resources here to help the new owner. Look around. Ask questions. We're a knowledgeable and patient lot!

    

3Back to top Go down    Re: hi there folks on Mon Feb 09, 2015 8:46 pm

wibblewobble

avatar
active member
active member
The bike has been running great apart from a non functional speedo and fuel gauge but that hasnt really bothered me. The speed I can work out from the rpm and the fuel level from a glance inside the tank.

The fuel filler lock failed on me yesterday so I had to cut the pin on the flap with a small cutting disc on a dremel to get into the tank so it was subjected to a bit of vibration from the cutting and a few knocks with a small hammer in the lock assembly. I went out for a 50 mile ride afterwards and experienced no problems until today.



I went to start the bike today and it fired up with no problems to its usual tickover. About 20 seconds later while I was getting my gloves on the engine cut out without any warning. When pressing the starter button to fire it back up the fuel pump will still start as normal but the starter motor will not start to spin to turn the engine over. Tried a few times with no luck and left it for an hour, came back and it started up again, ran for ten seconds and then cut out again. Same deal again with the starter motor not doing anything. All other lights etc still work properly.

I tried a third time about half an hour later and it started again but this time only running for 1 second before cutting out.


I dont know much about these bikes but im assuming the ecu and other electrics are under the tank. How do I remove the tank and what is the problem most likely to be? A loose connection caused by yesterdays activity? Or an ecu problem that is unrelated. The bike has had a lot of electrical work done by the previous owners so a lot of connectors and earths have been replaced or modified.

Thanks

    

4Back to top Go down    Re: hi there folks on Mon Feb 09, 2015 9:01 pm

92KK 84WW Olaf

avatar
Life time member
Life time member
Dai and Comberjohn on the forum are not so far from you and have a wealth of knowledge about Ks. GMcQ is up that way too, Lisburn I think.

Incidentally there is an emergency fix for access to the fuel tank. a 3mm hold drilled 25mm back from the hinge, Sidecar Paul came up with it and it was tested recently. Drill that hole and plug it and you have an emergency release like the one in a cars auto transmission.

Tank on 86 has twolugs at the back of the tank with clips on them. Most people lose the clips. You have to disconnect the two fuel lines on the left side but be careful, the spigots on the tank can get broken off. The electrical connection to the fuel pump is on the right rear of the tank. The tank slides back and then lift off.

A word of caution, the fuel lines get hard with age and moving the tank around can cause them to crack so you should replace them as they are under pressure. BMW sell a length of fuel line, put the new ones a little longer and you can raise the rear of the tank to access the relay box without disconnecting the fuel lines, also you can slide it back to access radiator cap without disconnecting them too.

I had a similar issue as you with my LT. Cleaned all the earths, cleaned and checked all of the connections, cleaned starter motor, swapped load shed relay and starter relay. Last one I swapped was ECU at the headstock under the tank and it was cured after that.


__________________________________________________
1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 58,645 now 60,500miles
    

5Back to top Go down    Re: hi there folks on Tue Feb 10, 2015 11:11 am

wibblewobble

avatar
active member
active member
well I returned to the bike this morning and it started up perfectly. It ran for 2 minutes on the stand and cut out again.Same symptoms as before.

Lifted the tank, the ECU units pins are in perfect condition as are the pins in the connector block that attaches to it. The 4pin tank connector is in good condition also.

My dad suggested that something inside the ECU could be breaking down in use and providing the situation that I have. Does this seem like a likely diagnosis? If it is I can order a replacement unit and hope for the best. Im willing to go that far but dont want to get into the trap of spending lots of time and money on the bike replacing components and sensors to see if I can find a culprit. I also dont want to disturb the wiring as it has been repaired in the past and everything is now quite brittle with age.


On another unrelated note under the tank I also found a few connectors with nothing plugged into them. Pictures are below. Could anyone please identify what they are for?

There are the two 2 pin connectors in the first picture and also a 3 pin connector held in place with the cable tie at the top left.






There is also this 4 pin connector towards the top of the second picture. Thanks again for your help people

    

6Back to top Go down    Re: hi there folks on Tue Feb 10, 2015 12:56 pm

Inge K.

avatar
VIP
VIP
fluffynat05 wrote: I also dont want to disturb the wiring as it has been repaired in the past and everything is now quite brittle with age.
Wiring repairs done by PO's isn't always that well done...........


fluffynat05 wrote:On another unrelated note under the tank I also found a few connectors with nothing plugged into them. Pictures are below. Could anyone please identify what they are for?

First pic: 3pin, hazard switch....spade connectors in T shape, heated grips....
the two connectors on top of the frame tube, no idea,,,former police?
whats the wiring colours?

Second pic: additional instruments.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

7Back to top Go down    Re: hi there folks on Tue Feb 10, 2015 2:02 pm

wibblewobble

avatar
active member
active member
On one of those the wires are brown and green/yellow
On the other the wires are brown and green/white


Ordered a replacement ecu from ebay and it should be here on thursday. Hopefully it will do the trick. I know the one that is in the bike at the moment was already replaced by the last owner as were the fuel injectors and some sensors.

Maybe these electrical parts are just getting to the age where failures are quite common, regardless of usage. On my old Hopnda NSR which was around the same age I went through 2 stators and 3 CDI's before getting components that worked properly

    

8Back to top Go down    Re: hi there folks on Tue Feb 10, 2015 4:11 pm

Dai

avatar
Life time member
Life time member
My guess is two unrelated problems that just want to plague you at the same time. The starter motor problem is most likely the starter motor relay. It won't be the starter switch because you've confirmed that the pump fires up. The other probability is a clogged-up fuel filter. If you don't know the provenance of the bike then changing the fuel filter should be high on your priority list anyway.

Someone else probably has additional ideas.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

9Back to top Go down    Re: hi there folks on Tue Feb 10, 2015 7:02 pm

Inge K.

avatar
VIP
VIP
fluffynat05 wrote:On one of those the wires are brown and green/yellow
On the other the wires are brown and green/white

The two last connectors is for additional (head)lights.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

10Back to top Go down    Re: hi there folks on Tue Feb 10, 2015 7:41 pm

Comberjohn

avatar
Life time member
Life time member
I would agree with Dai about the fuel filter.
Should be changed as soon as possible. Mine blocked on me, complete engine fail while overtaking. Brown trouser moment.
It wouldn't restart until it was changed. Was blocked with particles from the fuel pump rubber damper that was breaking up.
Other thought that occurred to me. Have you tried seeing if it will run longer with the fuel cap open?
I remember that if the vent on the fuel cap on some bikes is clogged up, air can't enter the tank and a vacuum develops stopping the engine until it sits for a while.
Easy to check for.
I live in Clough near Newcastle if you need a hand with anything.
I've had three bricks and can bluff my way around them a bit.


__________________________________________________
Life is not a rehearsal.
2010 VFR 1200F DCT
2010 R1200GS(gone)
1986 K100 Silver(gone)
2012 K1600GT(gone)
1984 K100RT Madison Silver(gone)
1989 K100LT Stratus Grey(gone)
1984 K100 Red(gone)
http://www.johnsdrivingschool.co
    

11Back to top Go down    Re: hi there folks on Tue Feb 10, 2015 8:53 pm

wibblewobble

avatar
active member
active member
There is loads of fuel flow from the tank when I pressed the starter button earlier with the fuel pipes disconnected. I will clean it out to be sure however.

The fuel cap is vented more than it would normally be anyway at the moment as I had to cut through the hinge to open it when the lock failed. Had a 50 mile ride like that with no problems.

to summarise:
1. hit starter button
2. bike fires up- runs perfectly
3. bike conks out a number of seconds later without warning
4. hit starter button again- fuel pump pumps, starter motor doesnt activate
5. leave bike for 30 mins
6. bike fires up again perfectly,starter working again, dies after a slightly shorter time period than before

7. leave bike for 18hours
8. Bike fires up and runs for a few minutes this time before cutting out
9. leave bike for 30 mins
10. bike runs for a second or two
11. the cycle repeats

after bike cuts out and starter motor doesnt work again it will not bump start either-suggesting that the whole injection system is offline too (unless these bikes cant be bumped)


why do all my bikes have to break at once? ARGHHHHHHHHHHHHH lol
the moped is currently off the road so I can fit some bearings into its final drive unit- the shafts normally run in the casings with only a bit of oil as lubricant. fine for a standardish or lightly modified one, not so good for mine which regularly sees 15000rpm and has around 5 times the original power output. Also the lack of a stand, instrumentation and any lights whatsoever scupper any ideas of using it as a daily ride in the mean time.

The ape (thats the van) is also off the road till I can replace a suspoected broken ignition pickup or source coil and trundle down to the local MOT station at a not so steady 4-25mph and get another years ticket on it.

The backup backup scoot is currently in my bedroom and I dont want to have to disassemble the thing to get it downstairs just to rebuild it again for a few days use.

    

12Back to top Go down    Re: hi there folks on Tue Feb 10, 2015 9:54 pm

Kyle10

avatar
Life time member
Life time member
Likely a clogged fuel filter &/or errant sludge lurking in the tank itself. Classic symptoms you're describing.
Allowing for time's inevitable toll I'd replace fuel lines, filter and give the tank an off-the-bike cleaning. Run Seafoam or such for a tank full or two afterwards.

Signed, One Who's Been There...


__________________________________________________
1985 K100rt 0052183
1983 Honda VF750 007713
    

13Back to top Go down    Re: hi there folks on Tue Feb 10, 2015 10:39 pm

Holister

avatar
Life time member
Life time member
fluffynat05 wrote:....

Lifted the tank, the ECU units pins are in perfect condition as are the pins in the connector block that attaches to it. The 4pin tank connector is in good condition also.

My dad suggested that something inside the ECU could be breaking down in use and providing the situation that I have. Does this seem like a likely diagnosis? If it is I can order a replacement unit and hope for the best. Im willing to go that far but dont want to get into the trap of spending lots of time and money on the bike replacing components and sensors to see if I can find a culprit. I also dont want to disturb the wiring as it has been repaired in the past and everything is now quite brittle with age.

....
The electronics come under suspicion quite a bit but are not often the cause of problems. FYI, there are 2 control units on the early Ks.
The Ignition Control Unit (ICU) is located under the tank just behind the headstock.
The Fuel Injection Control Unit (refered to as the ECU) is located under the seat accessible from behind the left side cover.
While the pins on both these may look ok it's a good idea to de-oxidised these and all other connectors and earth connections before doing any troubleshooting.
But I have to agree with suggestions above... sounds a bit like a fuel supply issue.

Questions:
1. When it dies, does it cough/splutter/hesitate first or does it just die like you turned the key off?
2. When its running for those few seconds, can you rev the engine smoothly above idle say around 2000 - 2500rpm

Cheers



Last edited by Kaptain Holister on Wed Feb 11, 2015 4:35 am; edited 1 time in total (Reason for editing : typo)


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

14Back to top Go down    Re: hi there folks on Tue Feb 10, 2015 11:03 pm

wibblewobble

avatar
active member
active member
I didnt realise there were two units. I ordered a replacement for the one behind the headstock.

1. when it dies its exactly the same way as if you turned the key off. NO coughing or spluttering or hesitation
2. when its running it revs and performs as smoothly as it always did. When I tested it earlier and it ran for 2-3 minutes the engine responded correctly and was still happy past 5k rpm.

Its worth noting that with with a 30min rest it ran only for a second or two, with an hours rest it ran for 10-20 seconds, and with an 18 hour rest it ran for 2-3 mins.

trying to start it within 30 minutes and no luck-no starter motor action but a yes to the fuel pump working. I removed the tank immediatly after one of the times it cut out and the lines underneath were still full of fuel.

    

15Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 5:33 am

Holister

avatar
Life time member
Life time member
It doesn't sound like its getting starved of fuel but that doesn't mean its not. Its puzzling???

I'm off on a different tack here... Try checking the battery. How's the electrolyte levels? Take a voltage reading with a multimeter set to DCv around 20v range with ignition key off then a reading under load... turn on anything that uses power like lights. Alternatively take the battery out and get it to a Battery shop and get them to test it.

Could be you're losing power to the ignition system somehow. Someone else might like to chime in at this point???

EDIT: Dai suggested the starter relay above. Would be worth taking a look at that. Its easy to open up. Its in the R/H rear corner of the elec box under the tank.



Last edited by Kaptain Holister on Wed Feb 11, 2015 5:41 am; edited 1 time in total (Reason for editing : added text)


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

16Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 5:42 am

92KK 84WW Olaf

avatar
Life time member
Life time member
When we had the problem with the K75 the guy thought it was a fuel supply issue too [which in a sense it was as it was an electrical connection]. But when I wriggled the unit under the seat the problem solved itself. I am not sure what was what but it was a bad connection from the multipin connector, it seemed to interrupt the fuel supply. The engine would stay running if we kept the starter button pressed which had told us we had a good fuel supply from the filter/fuel pump. It would also rev freely without spluttering. We cleaned up all the pins on the ECU under the seat and very slightly adjusted those we could not see a tell tale shiny line indicating a good electrical connection.

On the other hand when I had a problem on the LT there was no response when pressing the starter button and after changing relays and cleaning earths, connections etc it took a swap of the unit under the headstock to cure it. Oh, the fuel pump did work when this happened.


__________________________________________________
1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 58,645 now 60,500miles
    

17Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 6:13 am

fertilemind

avatar
active member
active member
Welcome from sweltering Johannesburg


__________________________________________________


1991 BMW K100LT | 1989 Suzuki GSX-R 750 K Slingshot
"duo sunt meliora quam quattuor rotarum"
http://www.robcochrane.com
    

18Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 6:19 am

Dai

avatar
Life time member
Life time member
Hi Olaf

Easily explained. Pin 8 on the ICU connects to pin 1 on the FICU; also pin 7 on the ICU connects to pin 85 on the Fuel Injection relay. Corrosion or a poor connection on either link will kill the system.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

19Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 9:36 am

Point-Seven-five

avatar
Life time member
Life time member
A clean shut down indicates an electrical issue. The fact that the longer the engine sits the longer it runs on the next start indicates it is probably temperature related. Hall effect sensor?

Just my $.02.


__________________________________________________
Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

20Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 10:22 am

Comberjohn

avatar
Life time member
Life time member
Maybe I've missed it in the thread but have you checked if there is a spark after it cuts out? Pull a plug cap off and hold a plug against the head and see if it sparks when cranked over.
Should rule out 50% of the potential problems.


__________________________________________________
Life is not a rehearsal.
2010 VFR 1200F DCT
2010 R1200GS(gone)
1986 K100 Silver(gone)
2012 K1600GT(gone)
1984 K100RT Madison Silver(gone)
1989 K100LT Stratus Grey(gone)
1984 K100 Red(gone)
http://www.johnsdrivingschool.co
    

21Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 8:17 pm

Jez

avatar
Gold member
Gold member
Just to throw another possibility into the ring......

I've recently had a few starter button issues. I've got to recognize it immediately now, but at first I was sure it was electrical. I have on a couple of occasions had the bike sit in a heavy down our, my rubber seal has long gone on the button. water and or road grime has got down into it and occasionally the starter button stays on (or worse comes on). It doesn't run the starter motor but suddenly enriches the fuel mix so it dies. if it happens under acceleration it can get quiet exciting and embarrassing.

When it first happened, I was sure it was either electrical interruption, or fuel starvation.

Just worth a look.

Jez.

Also, if you haven't looked at it. there are some great links in the portal.

So you bought a K bike, and the wiring diagrams.


__________________________________________________
84 K100 RS
Chassis number 0080546
    

22Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 8:23 pm

RicK G

avatar
VIP
VIP
It can only enrich the mixture if the neutral light is on or the clutch lever is pulled in.


__________________________________________________
If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

23Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 8:28 pm

Jez

avatar
Gold member
Gold member
Thanks Rick,

That'll explain why it gets me at the traffic lights. I imagine then also that an intermittently nutso gear position switch would only compound the issue?

jez


__________________________________________________
84 K100 RS
Chassis number 0080546
    

24Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 10:17 pm

Holister

avatar
Life time member
Life time member
@Comberjohn wrote:Maybe I've missed it in the thread but have you checked if there is a spark after it cuts out? Pull a plug cap off and hold a plug against the head and see if it sparks when cranked over.
Should rule out 50% of the potential problems.
I was thinking that also but ruled it out because the starter won't turn over till its good and ready. Then it starts and runs for a short time. Sounding more like the starter relay to me.


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

25Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 10:20 pm

Holister

avatar
Life time member
Life time member
@Jez wrote:Just to throw another possibility into the ring......

I've recently had a few starter button issues. I've got to recognize it immediately now, but at first I was sure it was electrical. I have on a couple of occasions had the bike sit in a heavy down our, my rubber seal has long gone on the button. water and or road grime has got down into it and occasionally the starter button stays on (or worse comes on). It doesn't run the starter motor but suddenly enriches the fuel mix so it dies. if it happens under acceleration it can get quiet exciting and embarrassing.

When it first happened, I was sure it was either electrical interruption, or fuel starvation.

Just worth a look.

Jez.

Also, if you haven't looked at it. there are some great links in the portal.

So you bought a K bike, and the wiring diagrams.
Jez. I had the same problem. Worth fixing that to avoid any problems on-the-road. Here's how I rigged a new cover button.
http://www.k100-forum.com/t8541-replacement-starter-button


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

26Back to top Go down    Re: hi there folks on Wed Feb 11, 2015 10:25 pm

Jez

avatar
Gold member
Gold member
Did it Kaptain,

I think it got down the back of the switch (crack in the housing at the top) have now lost my plunger and got silicone down the shaft of the switch. Nothing is very pretty there at the moment.


__________________________________________________
84 K100 RS
Chassis number 0080546
    

27Back to top Go down    Re: hi there folks on Thu Feb 12, 2015 6:35 pm

sidecar paul

avatar
Life time member
Life time member
@Jez wrote:Thanks Rick,

That'll explain why it gets me at the traffic lights. I imagine then also that an intermittently nutso gear position switch would only compound the issue?

jez
Hi Jez, here's another SCP clever idea (bodge?) that may help with your gear indicator.

http://www.k100-forum.com/t6936-gear-position-switch

Paul


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015)
....No CARS never ever!
    

28Back to top Go down    Re: hi there folks on Thu Feb 12, 2015 6:58 pm

Jez

avatar
Gold member
Gold member
That's fantastic,

Thanks again Paul.

Jez.


__________________________________________________
84 K100 RS
Chassis number 0080546
    

29Back to top Go down    Re: hi there folks on Fri Feb 13, 2015 12:14 pm

88

avatar
Life time member
Life time member
Hijackers!

Anyway, back to the business in hand.....Welcome to the Forum Fluffy. That's a nice clean K bike. Hope we'll see you out'n'about on it on one of our runs.


__________________________________________________
88....May contain nuts!

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

Bike: K100LT 1988. 0172363. AKA the Bullion Brick! Mods: k1100 screen and stands.
K1: 1990. 6374189. Custom Stealth Black paint.
    

30Back to top Go down    Re: hi there folks on Fri Feb 13, 2015 1:05 pm

sidecar paul

avatar
Life time member
Life time member
Duly admonished 88!

So, to the World's best forum Fluffy, enjoy your time here.

Paul.


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015)
....No CARS never ever!
    

31Back to top Go down    Re: hi there folks on Fri Feb 13, 2015 4:59 pm

Jez

avatar
Gold member
Gold member
Indeed.

Welcome aboard the K Bike express Fluffy, there's nothing about your bike you won't find here.

Jez.



Last edited by Jez on Fri Feb 13, 2015 4:59 pm; edited 1 time in total (Reason for editing : so I'd make sense for a change.)


__________________________________________________
84 K100 RS
Chassis number 0080546
    

32Back to top Go down    Re: hi there folks on Fri Feb 13, 2015 5:30 pm

wibblewobble

avatar
active member
active member
Just a quick update. Fitted a replacement ecu today and fired the bike up and it ran great. I got my hopes up and left it running, unfortunately 10mins later it cut out again.

This time the starter worked immediatly afterwards however unlike the last time. I tried a few times with the starter and it coughed a bit. Gave it a rest for 30 mins and went back to it. It cranked over but showed no signs of life. I unplugged one of the ht leads and stuck a known good spark plug in it from another bike and rested it on the cylinder head- cranked it a few times and no spark.

So the ecu replacement sorted whatever was originally wrong and now something else has gone wrong. I dont have the time to diagnose further issues or replace any more bits as all money is tied up in the scoot and the van. I think im just going to sell it,save the money up for a bit and pick up something else that will do as a runaround. Not too bothered about engine size so long as its greater than 125cc and can ferry me and a passenger all round the country this summer.

Its a real pity but I did get an enjoyable 6months out of a nice to ride bike with no hassle which was good. If anyone on here is interested in it let me know. There is 6 months MOT remaining on it.

Thanks again for all your help so far.

Nathan

    

33Back to top Go down    Re: hi there folks on Fri Feb 13, 2015 6:14 pm

Born Again Eccentric

avatar
Life time member
Life time member
Nathan,

That's a real shame. They are great bikes and when things go wrong they usually can be fixed relatively inexpensively.
There's a huge wealth of experience both here on the forum and very close to you in Northern (and Southern) Ireland and with a little time and patience, I'm sure you'd find the fault affecting your running and get her going once again.

However, totally understand conflicting priorities and limited funds - space can be an issue too. It's always a hard decision.

Best of luck with selling on. Hope she goes to a good home.


__________________________________________________

Paul

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurancewrite-off rebuild Feb 17
"Donor" K100LT 1990 (Red) (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike). June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

34Back to top Go down    Re: hi there folks on Sat Feb 14, 2015 1:10 am

Holister

avatar
Life time member
Life time member
You'll not find a more enjoyable motorcycle to "ferry a passenger around the country this summer" and you know it! And you'll lose money on it by selling it not running. Worth sticking at it imo.

Definitely electrical but I think buying another ICU was premature (don't thro the old one away just yet). The K-beast electrics are a little quirky so I don't think "something else has gone wrong". Likely there's a couple of issues in the mix.

  • Contacts on the ICU and ECU. You've not said if you had cleaned these. They BOTH really need deoxidising. You should be able to buy something like Deoxit locally.
  • If there is no spark and it won't even try to start without even a cough then it's not likely to be the coils. Both coils going at once is unlikely. The coils rely on a good earth so well worth taking the earth connections apart, cleaning well and deoxidising also. The main one is under the tank on the left of the main spar and another on the GB just above the left foot peg


Failing that, I would be testing coils and HT leads. There's a good thread here to walk you thru that.

These things together would take less than an hour and the cost of some electrical cleaner.

Hang in there fluffy :albino:


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

35Back to top Go down    Re: hi there folks on Sat Feb 14, 2015 2:04 pm

wibblewobble

avatar
active member
active member
The bike went away today, buyer is going to spend some time doing it up.
Quite handy really as yesterday my angle grinder exploded,and the inner tubes on the van disintegrated and rims were rotten from the inside when I went to change the back tyres. The money will be handy for sorting that out and saving up for a replacement bike.....or some more go faster parts for the scooter Very Happy

    

36Back to top Go down    Re: hi there folks on Sat Feb 14, 2015 2:17 pm

Born Again Eccentric

avatar
Life time member
Life time member
Well, I hear that she has gone to a good home...ride safe and hope to see you back on here when you've had enough scooting about and fancy a bigger bike again.


__________________________________________________

Paul

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurancewrite-off rebuild Feb 17
"Donor" K100LT 1990 (Red) (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike). June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

37Back to top Go down    Re: hi there folks on Sat Feb 14, 2015 6:49 pm

Dai

avatar
Life time member
Life time member
Yeah - it's crash-landed about four hundred yards from me!!


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

38Back to top Go down    Re: hi there folks on Sat Feb 14, 2015 8:21 pm

wibblewobble

avatar
active member
active member
spotted a little honda vt500 today, it looks promising. Never had a v before so would quite like to try one and see what they are like Smile

    

39Back to top Go down    Re: hi there folks on Sat Feb 14, 2015 8:55 pm

RicK G

avatar
VIP
VIP
Hope it works out well for you Nathan but any older bike is going to have issues and from experience you would find getting parts for an older Honda far harder.


__________________________________________________
If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

40Back to top Go down    Re: hi there folks on Sun Feb 15, 2015 7:50 am

Born Again Eccentric

avatar
Life time member
Life time member
fluffynat05 wrote:spotted a little honda vt500 today, it looks promising. Never had a v before so would quite like to try one and see what they are like Smile
My first bike after passing my test was a Honda VT500. Nice enough bike to ride and considerably lighter than the K's (but what would you expect - it's half the size).

The V twin arrangement works well, I don't recall any vibration problems but is a right PITA to change the spark plugs etc because of the orientation.

Sadly mine started burning more oil than fuel (only did about 20 miles/day on it) and in my enthusiastic ignorance, I decided to strip her down and fix her. Long story short, the price of the bits exceeded the value of the bike and while saving up for these bits, I had a work bench malfunction that resulted in all my carefully arranged (but not bagged and tagged) components and engine crashing to the garage floor and getting thoroughly mixed up and confused. A few months later, I had to move house for work and I knew that the box of assorted VT500 pieces was never realistically going to ever become a bike again. A local bike breaker rudely offered me a few pence for the bits, so I took the whole lot to the council tip and chucked it in the metal recycling bin!!


__________________________________________________

Paul

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurancewrite-off rebuild Feb 17
"Donor" K100LT 1990 (Red) (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike). June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

41Back to top Go down    Re: hi there folks on Sun Feb 15, 2015 9:03 am

Comberjohn

avatar
Life time member
Life time member
Think that might have been the ultimate fate of this particular brick.
Gave it a quick wash this morning. What a difference!
Far from mint, but I can see a bike there now.
If you're still dipping into this thread, Nathan, you may have regrets about selling it. Too late!
Jap bikes are generally so unsatisfying.
They used to call British built cars from the 50's and 60's 'gray poridge' because they were so dull. You could call a lot of the Jap stuff from the last 30 years the same.


__________________________________________________
Life is not a rehearsal.
2010 VFR 1200F DCT
2010 R1200GS(gone)
1986 K100 Silver(gone)
2012 K1600GT(gone)
1984 K100RT Madison Silver(gone)
1989 K100LT Stratus Grey(gone)
1984 K100 Red(gone)
http://www.johnsdrivingschool.co
    

42Back to top Go down    Re: hi there folks on Sun Feb 15, 2015 7:37 pm

Dai

avatar
Life time member
Life time member
When I was writing for most of the (UK) monthly bike mags back in the Nineties we referred to any bike built in the 50s and 60s and under 500cc as 'grey porridge'. I wonder who originated the term?


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

43Back to top Go down    Re: hi there folks on Mon Feb 16, 2015 3:28 pm

sidecar paul

avatar
Life time member
Life time member
@Dai wrote:When I was writing for most of the (UK) monthly bike mags back in the Nineties we referred to any bike built in the 50s and 60s and under 500cc as 'grey porridge'. I wonder who originated the term?
Dai, I think it was 'One Track' who used to write for Motorcycle Sport (and MPH, the Vincent OC magazine).

Paul.


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015)
....No CARS never ever!
    

44Back to top Go down    Re: hi there folks on Mon Feb 16, 2015 4:26 pm

92KK 84WW Olaf

avatar
Life time member
Life time member
A number of years back a new magazine came out, called Mercedes Enthusiast. I took to it and was mighty impressed to be taken back to the great road tests of the early seventieswhen I opened it toread some very well writtenroad testsby none other than LJK Setright. Unfortunately some years later he passed away.

Now I wonder would Dai and more of us remember his rides on Honda fours, Suzuki Kettles etc etc.....



Last edited by 92KK 84WW Olaf on Mon Feb 16, 2015 4:28 pm; edited 1 time in total


__________________________________________________
1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 58,645 now 60,500miles
    

45Back to top Go down    Re: hi there folks on Mon Feb 16, 2015 4:27 pm

Dai

avatar
Life time member
Life time member
SC: I thought it might have been Radco, but on reflection he was too much of a gentleman to turn a phrase like that.

Olaf: I never met LJK because I was a freelancer rather than an employee, so we (effectively) moved in different circles.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

46Back to top Go down    Re: hi there folks on Sat Mar 07, 2015 7:32 pm

Comberjohn

avatar
Life time member
Life time member
Just a quick update on the fate of Nathan's K100.
Also, I know he has been dipping into the forum now and again.Cool
There's no known cure Y'know.
Haven't done much to it but it is now a reliable runner in the true spirit of a K100. Starts first time, every time.
The problem?
It had a home made immobilizer consisting of a key switch in the tail unit and a series of wires to a rather damp, metal clad relay.
Cut it all away and no more running problems.
Seeing as it still has an MOT, I'm thinking of giving it a service and a tart up and maybe putting it on the road now and again this year.
There's always next winter for a rebuild.sunny


__________________________________________________
Life is not a rehearsal.
2010 VFR 1200F DCT
2010 R1200GS(gone)
1986 K100 Silver(gone)
2012 K1600GT(gone)
1984 K100RT Madison Silver(gone)
1989 K100LT Stratus Grey(gone)
1984 K100 Red(gone)
http://www.johnsdrivingschool.co
    

47Back to top Go down    Re: hi there folks on Sun Mar 08, 2015 10:54 am

Holister

avatar
Life time member
Life time member
Good to hear it's been saved John.


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

48Back to top Go down    Re: hi there folks on Sun Mar 08, 2015 4:38 pm

JGT

avatar
Gold member
Gold member
Dai, I think it was 'One Track' who used to write for Motorcycle Sport (and MPH, the Vincent OC magazine).


Was/Is 'One Track' Ted Davis? John


__________________________________________________
1987 K75s 1969 Bultaco Matador
    

49Back to top Go down    Re: hi there folks on Sun Mar 08, 2015 6:29 pm

wibblewobble

avatar
active member
active member
excellent, good to hear its working again and will get a bit of use. Dont think I would have been able to diagnose that immobiliser issue myself.

    

50Back to top Go down    Re: hi there folks on Sun Mar 08, 2015 6:58 pm

Comberjohn

avatar
Life time member
Life time member
Hi Nathan. Knew you couldn't stay away!
Decided to go ahead with the rebuild anyway.
It's a bit lighter than it was this morning.

" />


__________________________________________________
Life is not a rehearsal.
2010 VFR 1200F DCT
2010 R1200GS(gone)
1986 K100 Silver(gone)
2012 K1600GT(gone)
1984 K100RT Madison Silver(gone)
1989 K100LT Stratus Grey(gone)
1984 K100 Red(gone)
http://www.johnsdrivingschool.co
    

Sponsored content


    

View previous topic View next topic Back to top  Message [Page 1 of 2]

Go to page : 1, 2  Next

Permissions in this forum:
You cannot reply to topics in this forum