BMW K bikes (Bricks)

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1Back to top Go down   Brand new Fuel pump not working Empty Brand new Fuel pump not working on Tue Jan 08, 2019 2:49 am

JDiggamus

JDiggamus
active member
active member
Hello All, Need some help here, I'm a novice. I just bought a 1984 K100rs, the fuel pump was bad, at least so I was told, so I bought a new one and replaced it. However, nothing happens to the pump when I try turning the bike over. Disclaimer, I haven'tturned the bike on yet since I got it 5 days ago, been waiting on the fuel pump. I haven'treally checked anythingother than the fuses and there are 2 fuses missing from the slots. Anyoneknow what kind of fuses I need?

If its not a fuse problem what could it be?

thanks for your help in advance, I'mlearning as I go.

    

2Back to top Go down   Brand new Fuel pump not working Empty Re: Brand new Fuel pump not working on Tue Jan 08, 2019 3:07 am

MartinW

MartinW
Life time member
Life time member
Fuel pump fuse is # 6 from the top marked Kraffstoppe. The 4 pin connector that resides under the RH side of the fuel tank is a known source of problems. Cleaning with 2 part DeoxIT can sometimes restore connectivity. Once mine started to play up I cleaned it a couple of times then replaced it. I replaced it with a waterproof one from an electronics store. With the connector apart check for power when you hit the starter button.
Regards Martin.


__________________________________________________
K75s Hybrid
    

3Back to top Go down   Brand new Fuel pump not working Empty Re: Brand new Fuel pump not working on Tue Jan 08, 2019 7:29 am

Dai

Dai
Life time member
Life time member
Also: fuse #4 has a 12-volt feed on one side but isn't connected to anything.


__________________________________________________
'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)
    

4Back to top Go down   Brand new Fuel pump not working Empty Re: Brand new Fuel pump not working on Tue Jan 08, 2019 7:43 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
On 84 K the fuel pump plug connector is the front left of the tank and is even worse for trouble.

If you probe into the pins on the plug you can open them out a little to make a better connection with the receiver under the tank.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now91,850 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox
    

5Back to top Go down   Brand new Fuel pump not working Empty Re: Brand new Fuel pump not working on Tue Jan 08, 2019 9:22 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
I'm curious how you have an '84 K in the US. Is it a Euro model, or perhaps a build date of late 1984 which might make it an '85? The US didnt get K bikes until model year '85. Please post the last seven digits of the VIN as your signature so we know that we are looking at apples not tangerines.

Go to:
http://www.realoem.com - enter the BMW catalogue, then your VIN to see the model year, production date and intended market.


__________________________________________________

1987 K100RS, '89 K100 w/K1100RS engine, '93 Framed K11/K12 engine 'Big Block', '96 K1100RS, '09 K1300GT, '07 K1200R, '95 R100 Mystic & '77 R75/7.

    

6Back to top Go down   Brand new Fuel pump not working Empty Re: Brand new Fuel pump not working on Tue Jan 08, 2019 10:46 am

Laitch

Laitch
Life time member
Life time member
Please supply photos when describing problems. It is a help to respondents. Which fuses are missing?
Brand new Fuel pump not working K100_f10


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1995 K75T 68,000 miles
Brand new Fuel pump not working Usa-lo10
    

7Back to top Go down   Brand new Fuel pump not working Empty Re: Brand new Fuel pump not working on Tue Jan 08, 2019 10:53 am

duck

duck
Life time member
Life time member
First order of business is to make sure that the fuel pump is good. Put 12V to the smaller diameter terminal and ground to the other terminal.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

8Back to top Go down   Brand new Fuel pump not working Empty Re: Brand new Fuel pump not working on Wed Jan 09, 2019 2:34 am

JDiggamus

JDiggamus
active member
active member
@Two Wheels Better wrote:I'm curious how you have an '84 K in the US. Is it a Euro model, or perhaps a build date of late 1984 which might make it an '85? The US didnt get K bikes until model year '85. Please post the last seven digits of the VIN as your signature so we know that we are looking at apples not tangerines.

Go to:
http://www.realoem.com - enter the BMW catalogue, then your VIN to see the model year, production date and intended market.
Model K100rs
Production mo/yr- 08/1984
the intended market was Europe.

I got this beauty in Long Beach, CA

    

9Back to top Go down   Brand new Fuel pump not working Empty Problem Solved! on Wed Jan 09, 2019 2:39 am

JDiggamus

JDiggamus
active member
active member
Thanks for all the advice people, in the end, it was the 4 pin connectorthat was faulty. I also replaced all the fuses for good measure. The fuel pump is running. thanks again!

    

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