GL1000 ('76) Fuel Pump replacement - electric


Information and questions on GL1000 Goldwings (1975-1979)
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ned
Posts: 39
Joined: Thu Apr 29, 2010 10:32 am
Location: Sydney
Motorcycle: 1976 GL1000
1986 BMW K100RS
1998 BMW K1200RS

GL1000 ('76) Fuel Pump replacement - electric

Postby ned » Sun Apr 13, 2014 8:26 pm



Hi all,
I know that this is not a new topic, but I thought that a pic or two and a wiring diagram may help.

I screwed around with the original pump and failed to make the bike work well. I don't want to go through all the little problems, but suffice to say fuel starvation was the main problem especially when the heave throttle demand and low fuel (in the tank) was the underlying cause.

Replaced the thing with a CHEAP Ebay alternative with all parts and a spare pump cost was less than $100. The replacement pump can be changed in about 5min should the there be a pump problem.

Here is my solution:
a. It had to be wired through ignition circuit and not directly to the battery (simple solenoid so not shown on the diagram)
b. It had to be wired through the oil pressure switch to make the pump cut out when the motor stops (safety feature), and
c. It had to have a electric bypass switch (momentary) to prime the fuel system (cold starts).

Here is the solution. It looks a little messy because I didn't have the correct plug for the oil switch and the fuel filter was placed where I can see it (diagnostics). I will tydy this to replace connectors awitha single 4 way plug and move the filter where it belongs. :)

Happy to discuss and help if you want to build this. Hopefully you can see this.

https://drive.google.com/file/d/0B7_6gDPDREzKR3Zxenh5aWo3M3M/edit?usp=sharing
https://drive.google.com/file/d/0B7_6gDPDREzKV1VKMnhPZGhtdms/edit?usp=sharing



User avatar
ned
Posts: 39
Joined: Thu Apr 29, 2010 10:32 am
Location: Sydney
Motorcycle: 1976 GL1000
1986 BMW K100RS
1998 BMW K1200RS

Re: GL1000 ('76) Fuel Pump replacement - electric

Postby ned » Sun Apr 13, 2014 11:39 pm

ned wrote:Hi all,
I know that this is not a new topic, but I thought that a pic or two and a wiring diagram may help.

I screwed around with the original pump and failed to make the bike work well. I don't want to go through all the little problems, but suffice to say fuel starvation was the main problem especially when the heave throttle demand and low fuel (in the tank) was the underlying cause.

Replaced the thing with a CHEAP Ebay alternative with all parts and a spare pump cost was less than $100. The replacement pump can be changed in about 5min should the there be a pump problem.

Here is my solution:
a. It had to be wired through ignition circuit and not directly to the battery (simple solenoid so not shown on the diagram)
b. It had to be wired through the oil pressure switch to make the pump cut out when the motor stops (safety feature), and
c. It had to have a electric bypass switch (momentary) to prime the fuel system (cold starts).

Here is the solution. It looks a little messy because I didn't have the correct plug for the oil switch and the fuel filter was placed where I can see it (diagnostics). I will tydy this to replace connectors awitha single 4 way plug and move the filter where it belongs. :)

Happy to discuss and help if you want to build this. Hopefully you can see this.

https://drive.google.com/file/d/0B7_6gDPDREzKR3Zxenh5aWo3M3M/edit?usp=sharing

https://drive.google.com/file/d/0B7_6gDPDREzKV1VKMnhPZGhtdms/edit?usp=sharing




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