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1Back to top Go down   K1100LT sidecar Empty K1100LT sidecar Sun Nov 21, 2021 10:28 pm

Rockman

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I'll restart this thread here because I'm chasing info on why it doesnt go..

I have a 1994 K1100LT sidecar. I got it as a non-runner. Yesterday I drove down and picked it up, a 1100km round trip. Pissed down with rain all the way down and all the way back but thats by the way.

The previous owned said it got progressively harder to start over a couple of months, then wouldnt go at all. He tells me he replaced the fuel pump and filter and some hoses, then gave up. Old pump, filter and other bits are in the top box so I believe him.

About all I noted this morning is that the fuel pump isnt running and is obviously the reason it doesnt go. Now I'm looking for reasons the fuel pump doesnt work. I expect there are some cutouts to check - neutral, clutch, sidestand etc. Tank connector. Fuses. Any other suggestions?

    

2Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Sun Nov 21, 2021 10:41 pm

RicK G

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Does the pump run for 1.5 seconds when the key is turned on. If it does then the problem isn't the pump if not the problem is the pump or connections.
I have come across a hall sensor plate that was flooded with oil that caused a problem that was much the same.


__________________________________________________
"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 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

3Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Mon Nov 22, 2021 1:58 am

Rockman

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@RicK G wrote:Does the pump run for 1.5 seconds when the key is turned on. If it does then the problem isn't the pump if not the problem is the pump or connections.
I have come across a hall sensor plate that was flooded with oil that caused a problem that was much the same.
No the pump doesnt run at all so its likely connections. The starter motor turns over ok and all the rest of the electrics work.

    

4Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Mon Nov 22, 2021 5:04 am

Arlina

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Start with the connector of the tank/fuelpump. That's the easy one.
Try to clean the contacts, and bend the females a bit inside.

Next is the fuelpump relay, in the relaybox, swap it with the horn relay.


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K1100LT sidecar Eu-log10  K1100RS/LT - R1200RT - R1100RS (RIP) - Cagiva SST 350 Ala Verde - K75LT project - K75 Schurgers - K75S
    

5Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Mon Nov 22, 2021 8:03 am

92KK 84WW Olaf

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Side stand is high on the list. Been there. Just to clarify although you need either neutral light on [neutral on itself is not enough, must have the light on] or clutch in to start, you also need the side stand. Also, side stand cut out stops the pump priming so if pump is not priming, start there.

Fuel pump relay can go faulty too, I think the horn relay can be changed over.

Fuses can look good but can also still be faulty so a change of fuses is a good idea.

I have been victim of diy pump jobs by 2 previous keepers on my last 2 Ks that I bought. The reinstall not done correctly and the pick up not placed correctly meaning its not actually getting fuel despite the tank being half full- fuel starvation.


__________________________________________________
1992 K100LT 0193214 Bertha 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 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 40,490 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

6Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Tue Nov 23, 2021 12:12 am

Rockman

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A little more progress of the one step forward two back variety. I located the tank connector. There are 4 wires, green, brown and a couple of others (Fuel & Temp gauges). I worked out that the green and brown run the pump. With the ignition on. the bike side (male) of the connector gives me 12v on the green and white and about 7.5 on the other, zero on the brown. Brown is earthed. So, I rigged up a positive connection to the green and an earth to the brown on the tank side (female) with the connector disconnected. The pump went for about the required 15 sec then stopped. I tried cranking it but the bike didnt go.

Now for the odd bit - I bared the green wires either side of the connector to check the voltage. With the connector disconnected I get ~12v on the male side. With the connector connected this drops to 0.25v and is the same on the tank side. This seems a bit strange to me. Should this happen??

    

7Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Tue Nov 23, 2021 5:22 am

Gaz

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Hi Phil, do you have the K1100LT wiring diagrams? If not I still have my manuals with the K1100 diagrams and can copy and forward to you.

What year is your bike?

Cheers


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Gaz
1990 K75 6427509; 1987 R80G/S PD 6292136; 2010 G650GS ZW13381; 95 K1100LT 0232224
    

8Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Tue Nov 23, 2021 5:06 pm

Rockman

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@Gaz wrote:Hi Phil, do you have the K1100LT wiring diagrams? If not I still have my manuals with the K1100 diagrams and can copy and forward to you.

What year is your bike?

Cheers
Hi Gaz - I have a manual on a stick that came with the bike. I assume it has wiring diagrams but havent checked, so thanks but I think I'll be right. The bike is a 1994 ex the UK (Imported as a sidecar outfit)

    

9Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Tue Nov 23, 2021 6:20 pm

charlie99

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@Rockman wrote:A little more progress of the one step forward two back variety. I located the tank connector. There are 4 wires, green, brown and a couple of others (Fuel & Temp gauges). I worked out that the green and brown run the pump. With the ignition on. the bike side (male) of the connector gives me 12v on the green and white and about 7.5 on the other, zero on the brown. Brown is earthed. So, I rigged up a positive connection to the green and an earth to the brown on the tank side (female) with the connector disconnected. The pump went for about the required 15 sec then stopped. I tried cranking it but the bike didnt go.

Now for the odd bit - I bared the green wires either side of the connector to check the voltage. With the connector disconnected I get ~12v on the male side. With the connector connected this drops to 0.25v and is the same on the tank side. This seems a bit strange to me. Should this happen??
dropping voltage whilst under load , ?

i would go back to the fuel pump relay and measure there  as you are getting the voltage drop either side of the connector 

or just put in a new relay and measure again

dont forget the corroded fuse holders issue , may just need a little cleaning and a new fuse in there  (one with clean blades etc )


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OK1100LT sidecar Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

10Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Wed Nov 24, 2021 1:19 am

RicK G

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A voltage drop like that is classic of a bad connector, possibly a broken wire, bad relay contacts.


__________________________________________________
"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 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

11Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Wed Nov 24, 2021 5:34 pm

Rockman

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@RicK G wrote:A voltage drop like that is classic of a bad connector, possibly a broken wire, bad relay contacts.
It'll be the weekend before I can get back to it. I'll need to remove some of the tupperware to get into it properly.

Edit - I found 1/2 hr and swapped the pump and horn relays. The pump now runs for the required ~15 sec but with a horrible graunching noise, and the bike doesnt run of course. It could just be vibration against the side of the tank, but I think I should pull everything out of the tank and check whats going on. I'll also pull an injector or 2 to see if they are working, and check if there is spark.

    

12Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Sun Nov 28, 2021 1:58 am

charlie99

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yeah, new pump by the sound of it 

an injector clean would also be a good move , after changing the hoses 

good luck


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OK1100LT sidecar Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

13Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Sun Nov 28, 2021 5:34 pm

Rockman

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Yesterday I pulled one of the plugs out - no spark, so there is another issue to investigate. I also noticed that the plug was dead dry, so probably the injectors arent going either. Both could be related.

    

14Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Sun Nov 28, 2021 7:42 pm

RicK G

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Hall sensors would be a good place to start looking. They control the spark and injection timing.


__________________________________________________
"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 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

15Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Sun Nov 28, 2021 8:02 pm

Rockman

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@RicK G wrote:Hall sensors would be a good place to start looking. They control the spark and injection timing.
G'day Rick, how do I go about testing the sensors?

Incidentally, I did pull the cover off on your suggestion that the housing might be full of oil, but it was dry.

    

16Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Sun Nov 28, 2021 9:44 pm

RicK G

RicK G
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__________________________________________________
"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 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

17Back to top Go down   K1100LT sidecar Empty Re: K1100LT sidecar Mon Nov 29, 2021 1:28 am

Rockman

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