BMW K bikes (Bricks)

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1Back to top Go down   New battery, no power. Empty New battery, no power. on Mon May 04, 2015 5:27 pm

wheels149

wheels149
active member
active member
So Newbie here is working on a 85 K100RS that was stripped when I brought it. Basically the bike has no front end on it and no bodywork. I have everything connected except the headlight, taillight, heated grips and indicators. Tank is connected. This bike has sat in a shed near the coast for 3 years.

Put a new battery in and nothing. Nothing on the dash and fuel pump not working. There is power to the start relay, all fuses seem to be good and there is power to the ignition key. Have roughed up frame earth but the earth to the gearbox is seized so cannot get it undone. Is this earth important? I have been told it could be one of the relays! Any ideas?

    

2Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Mon May 04, 2015 7:30 pm

kioolt

kioolt
Silver member
Silver member
If my memory is correct the earth on the gearbox goes directly to the battery.  On a bike that hasn't had it's wiring altered this earth is the ONLY connection to the negative post of the battery.  So, yes it is important.


__________________________________________________
2004 R1150RT 186,800 miles 
1991 K100LT 128,700 miles
1982 R100RT 106,900 miles
Total 422,400 BMW miles

AMA,BMWRA,BMWMOA


The cheapest thing on a BMW is the nut that connects the handlebars to the seat.
    

3Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Mon May 04, 2015 7:51 pm

Holister

Holister
Life time member
Life time member
+1 that. If its seized its a good indication that its well corroded and not earthing at all.
Another important earth, besides the one you've cleaned on the frame under tank, is the starter motor. make sure the brushes are clean and in spec. Also, because the starter motor earths thru its casing, the bed it sits on (2 small bolts at the back) should be clean as well.

Use the Google search bar on the Forum or Portal tabs to search for key words on the forum. It works well for finding specific info.
Also, go to the Portal page and read You Just Bought a Used K100, What Now and also work thru the trouble shooting procedure on EFI/Electronic Ignition Troubleshooting


__________________________________________________

1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
  New battery, no power. Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

4Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Tue May 05, 2015 5:37 am

wheels149

wheels149
active member
active member
Well it must be the earth connection. Have spent many hours trying to get the bolt out. You guessed it stripped it! Now looking at drilling out the bolt. Oh the joy.

    

5Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Tue May 05, 2015 5:55 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
As a test just fit another earth to the battery and ground it to the engine near the one you are trying to undo. If it works then you know where you are at. Let us know what happens.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 100,380 miles
1983 K100RS 0011171 Fricka 606 29,495 miles Damn K Pox Its a Bat outta Hell No 33,600 miles
    

6Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Tue May 05, 2015 5:58 am

K75cster

K75cster
Life time member
Life time member
You could go to the wreckers and grab a longer and a little thicker battery cable from a car and hook it up to another bolt, Worth a try at least.


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

7Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Tue May 05, 2015 7:20 am

wheels149

wheels149
active member
active member
So drilled out the bolt and hooked to the cable to the case where the Alt cover  bolts up. Silence, nothing, zip, not a thing happening. Its go to be a connection somewhere? as mentioned I have everything connected except heated grips, headlight, taillight rear brake light switch and indicators!

    

8Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Tue May 05, 2015 7:26 am

Holister

Holister
Life time member
Life time member
The alternator cover is plastic and even tho the bolt goes thru to the casing, you may not be getting a connection because you wouldn't be able to tighten it enough on plastic.
Just attach it to one of the starter fixing bolts. Pretty sure its the same size bolt and the cable should easily reach. Make sure the bed the starter bolts to is clean.


__________________________________________________

1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
  New battery, no power. Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

9Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Tue May 05, 2015 8:52 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Are you sure the ignition switch is working properly?  You say you have power there, but can't get power to the rest of the bike.

I just had a similar problem with my bike, only it was intermittent.  On mine, even though there was no crud or corrosion in the switch the moveable contact had shallow grooves worn into it that did not make reliable contact.  Repaired the surface, and, knock on wood, problem solved. 

Checking should be easy, just hot wire the switch.  Corrosion, wear, dirt and a crappy design make that switch a weak point.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

10Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Tue May 05, 2015 9:04 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
Ignition switch next port of call. They are known to go wrong with age.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 100,380 miles
1983 K100RS 0011171 Fricka 606 29,495 miles Damn K Pox Its a Bat outta Hell No 33,600 miles
    

11Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Tue May 05, 2015 7:18 pm

wheels149

wheels149
active member
active member
yep was ignition, I hot wired it and now the dash is now alive. However no starter and no fuel pump. Thanks to the Kaptain's trouble shooting link I will continue.

Thanks for all your suggestions. this site is invaluable.

    

12Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Wed May 06, 2015 2:11 am

Holister

Holister
Life time member
Life time member
@wheels149 wrote:yep was ignition, I hot wired it and now the dash is now alive. However no starter and no fuel pump. Thanks to the Kaptain's trouble shooting link I will continue.Thanks to Crazy Frog for put all the time and effort he has put into compiling all that information for the benefit of members.  New battery, no power. 112350

Thanks for all your suggestions. this site is invaluable.


__________________________________________________

1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
  New battery, no power. Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

13Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Wed May 06, 2015 9:39 pm

wheels149

wheels149
active member
active member
It turns! So I bridged the clutch cut off switch and she turns. Now it won't fire! I have fuel pressure, spark and when I pump the throttle bodies I get a wet plug but no go! I suspect injectors?

    

14Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Wed May 06, 2015 9:57 pm

RicK G

RicK G
VIP
VIP
The only way to get fuel into your engine is via the injectors. Have you put fresh fuel into it and cleaned the old fuel out.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

15Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Wed May 06, 2015 9:58 pm

Holister

Holister
Life time member
Life time member
Pumping the throttle bodies won't do anything. If you have wet plugs then the injectors are probably working ok.
Make sure you have the HT leads connected in the correct order. The coils are labeled 1&4 , 2&3

Follow the troubleshooting procedure.


__________________________________________________

1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
  New battery, no power. Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

16Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Wed May 06, 2015 10:27 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
How wet are the spark plugs?  If the injectors are stuck open they could be flooding the engine. 

If you haven't already, get the old fuel out and get 2 gallons of fresh gas with a good cleaner in there.  Mix the cleaner with the gas before putting it in and run the starter to circulate the fuel for 5-6 seconds.  Do that five or six times and if the engine doesn't start let it sit overnight with a battery charger on it.  Next day try again after the overnight soak.  Check the plugs again to see how wet they are.  

It might take a couple days to get enough varnish out to let the injectors work.  If not, you will have to take them to a shop that cleans fuel injectors. 

It is also possible that the air flow sensor is stuck open and calling for more fuel than the engine can take and causing it to flood.  Can't tell you how to check that, but I am sure there is someone here who can.  Mostly I suspect bad gas or stuck injectors from sitting for three+ years.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

17Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Thu May 07, 2015 12:08 am

Holister

Holister
Life time member
Life time member
I'd agree that bad fuel could be the problem and best to clean it out. As for the injectors, I think it's more likely that they would stick shut than open if they've been left to sit and less likely that all of them would be stuck open imo.
Best to take them out if they're suspect and clean and check them properly. Read up about this first as there is dirt, o-ring, filters etc to consider before removal.

You say you "get a wet plug" but have you checked that all SPs are wet? and that you have spark on each one?

Make sure you don't crank it for too long. You can damage the starter. 5-10 sec at a time is enough. Also keep your battery charge maintained while you go thru this process. 12.5V (70% charge) and above.


__________________________________________________

1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
  New battery, no power. Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

18Back to top Go down   New battery, no power. Empty Re: New battery, no power. on Tue May 12, 2015 6:10 am

wheels149

wheels149
active member
active member
Update. Sorry should have said the tank and rail where empty so no fuel at all. I put premium ULP in and tried all of the above mentioned. Anyway a mate of mine is an ex-BMW merchanic and we agree injectors. So have got them out and off for a pro cleaning (ultrasonic). Will put new orings on and put em back in to see what happens.

    

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