So, I have an 05cbr600RR that quit running at a gas station. Given I heard no priming of the fuel pump and such I bought a quantum fuel pump replacement, read forums, took pictures, did all the necessary things to have the job completed right. I am no stranger to wrenching on her, but this issue is baffling. When the fuel tank is at an odd angle, the bike will run perfectly fine but more often than not the fuel reading bars are blinking in sequence and the bike will start and quickly die. I've moved the connection to the fuel pump around (where it branches from the harness) and haven't noticed a short and my voltmeter has told me all is fine. Now I'm at a loss as to what to do. Has anyone else had a similar issue or any advice??

 

Hi and welcome!

Don't replace perfectly-working parts with brand-new perfectly-working parts. Nothing will change and symptoms will persist. You'll want to test and measure to narrow down problem-area to specific component that's actually identified as bad from numbers you've measured. Then replacing that one part will fix problem.

So measure:

1. BAS output at various bike-angles
2. fuel-level sender at various bike-angles

 

I'd be leaning towards troubleshooting the operation of the BAS. The fuel sensor might give you funny readings if it's not working properly, but it won't prevent the Fuel Pump from priming or the engine from running.

 

Ah good point. I had wonky BAS that would freeze up (literally) in winter. No fuel-pump prime.

Well, winter in S.F. Bay Area is 25-30F. Something would happen to BAS if I left bike outside. So I'd have to take it off, warm up under my arm-pits, and shake it around. Then plugging it back in and bike would be able to start.

 

I'm in South Florida. I'm not really sure what winter is, but I've read about it.