1978 fuel tap problems

[Michaelheyes]

If the engine is off or running I’m having fuel pass through the right carb breather, it doesn’t matter what position the tap is in… 1978 GS1000   Is this a fuel tap replacement required? Thanks

[Isleoman]

Based on your description that it occurs when off or when running.    My guess (and that's all it is).... is the carb needle valve o-ring or the float is stuck.   The float moves the needle valve up and down and if the tip of the needle is gummed up or misshapen the fuel won't be cut off when enough has entered the bowl.  You can try lightly rapping on the side of the bowl of the offending carb.    It could un-stick it.

 

There may also be something wrong with your tap.   If you leave it in the run position it shouldn't flow fuel when off.  You didn't say how long it flows fuel when engine off 

 

    

[wraith]

Welcome to OSS.

You may need both a tap rebuild kit and a carb o'ring kit/flot valve, as above.

One way of maybe finding out which one is need attention, is to take the fuel pipe off, with the tap on ever on or rec, if fuel keeps coming out of the tap, the tape need a new rebuild kit.

You may find you need to do the carbs as well but start with one thing and take it from there 

Edited June 23, 2022 by wraith