Fuel pump hot wired.

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Muscrap
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Fuel pump hot wired.

Post by Muscrap »

I found my bike has a hotwired fuel pump. The hot lead is spliced off of the thermo switch. I ohm'd the line to the fuel pump and it ohms good. What reason would the PO hot wire the pump? Relay bad?


With it hot wired, the fuel pump "clicks" super fast when petcock is in off position, and clicks ~2 secs when in fuel on position.

thanks for the help!
The power of the Fiz compels me.
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trifgeorge
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Re: Fuel pump hot wired.

Post by trifgeorge »

that is also how my fuel pump is wired. never had a problem with the way it's wired since i purchased it. i also let the ignition set to ON only when i need to start the bike and when the bike runs, so i can avoid the pressure building up in the carbs.
1992 Yamaha FZR 600 3HE with:
GSX600F fully adjustable rebound forks
GSX600F front wheel with full floating disks
Sigma BC 1009 speedometer
YZF 600 Thundercat tank
Red Rizoma like grips
R6 pilot seat
Complete custom made tail with custom made rear seat
Led front and rear signals and tail light
Custom fiberglass electrics box
R6 Voltage regulator
Custom made rearset hangers
Custom made A123 LiFePO4 battery
KOSO mirrors
GSXR600SRAD swingarm-rear wheel assemby with 180/55/17 Michelin Pilot Power 2CT rear tyre
FZR1000 hydraulic clutch
H1 HID
Hand made mirror plates
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taggy
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Re: Fuel pump hot wired.

Post by taggy »

it'll click like mad when the fuel is off because there is no fuel there to turn off the pressure switch when the carb is full. The fuel acts a a sort of damper so without it will be able to click faster! I had to do this on the race bike but put an inline fuse there just incase as well as an on/off switch so that i could stop it if i needed to! the wires to my pump were rubbish and had intermittent power so it was the easiest thing to do!
Fzr400 3tj x2
fzr400 3en1 (17in conversion) now gone its way in parts!
'94 cbr 900rr
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