SOHC.co.uk Forums > CB750

750 f1 fuel leak

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Spitfire:
Hope it's not the same as my F1, turned out my leak was caused by pin hole leaks on the bottom of the tank by the petrol tap, hence my bike has an F2 tank.

Cheers

Dennis

Skoti:
Thanks for the replies.

The petrol tap seems ok, but maybe it gradually seeps fuel over a couple of weeks or so?
It's a spring loaded cone type tap and does not have the usual rubber packing washer with the holes.

I'm also thinking of renewing the needle valves and seats, but not sure about the quality of the aftermarket replacements available.

blackeagles:
while you have the bowl off you need to check the brass pipe inside the bowl for any split

Skoti:
Last night I rigged up a plastic pipe and bottle connected to the fuel tap to check for seepage overnight and this morning I have maybe a tablespoon of petrol in the bottle.

So before I go and fork out the best part of 80 quid for new fuel tap is there a way to repair those cone type taps fitted to later K and F1 models?

thanks in  advance

Skoti

hairygit:
I've known a few people have a go at repairing them, BUT the tap cover plate is riveted on, and no internal parts or packing was ever sold separately by Honda. Only the filter sick and large rubber washer that seals the tank to tap join, and they are very pricey for what they are.

Sent from my POT-LX1 using Tapatalk

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