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Author Topic: fuel pump  (Read 1507 times)

jag75

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fuel pump
« on: December 12, 2015, 12:14:27 PM »
Ok guys got a head scratcher for ya. Was working on a rc51 cuz it was cutting out. While taking off plastics and tank to check fuel pump we noticed the regulator / rectifier plug was melted . Wires were crisp was amazed that it even ran at all. Got a new set up now bike won't start. It gets fire but fuel pump wont prime. Took the pump out and connected directly to the battery and it worked . Plug it back in and nothing. The plug that the pump plugs into has 3 legs . The middle leg is the only one that reads hot. However it's the leg that goes to the pump resistor. We've swapped relays and no change . Bas  / kickstand switch are good . Any ideas??

jag75

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Re: fuel pump
« Reply #1 on: December 16, 2015, 02:46:03 AM »
Ok a little update. Think maybe a ground issue . We bypassed the relay but the pump wont stop priming. Thinking we need to trace the wires to see if that's the problem.

Cluck46

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Re: fuel pump
« Reply #2 on: December 16, 2015, 01:01:47 PM »
Only thing I can think of is make sure you clean the earth wire good??.one and only problem with a Honda is them.my mate got a jelly mold old cbr 1000.his went regulators.he got told put a Yamaha 1 on.he did not a problem since.dont know what one it was tho?????
Matris steering damper bewolf radiatior guard.and a mad connection between the handlebars to the seat 🙄

jag75

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Re: fuel pump
« Reply #3 on: January 02, 2016, 12:51:26 PM »
We think prob is wire harness . There's gotta be a wire grounded so think the easiest thing is a new wire harness . Less headache then cutting open and try to find the bad wire.