Question about Harley Davidson Motorcycles
Shut off valve leaks fuel
They do make rebuild kits for petcocks. Just going to depend on if they make one for your motorcycle or not. I did do a quick search for Harley petcock rebuild kits and they do make them.
Posted on Mar 23, 2014
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Posted on Jan 02, 2017
SOURCE: Fuel shut off valve
Recent shut off valves don't have an off position anymore it's been replaced with PRi which is prime..The petcock lever has a long side and a short side.w/long side pointed down that is ON..long side up that is RESERVE..halfway between is PRIME which is used when cycle has sat for a long time or has run out of gas...off is not used anymore cause the petcock is vacuum actuated and only lets gas flow when engine is running...except for PRIME, these should all be printed/stamped on your petcock...Good luck to you friend....Tim
Posted on May 11, 2009
Replace the petcock. The rubber diaphragm is ruptured. I'd also bet your fuel mileage dropped cause the ruptured diaphragm is allowing raw fuel to be sucked into the intake manifold.
Posted on Jul 23, 2009
Yes Rick, try a couple of tricks I know.First,open the carburettor drain screw located at the base of the carburettor,this lets fuel flow out of the carburettor drain located next to/under it.(To acces this drain screw look between the engine cylinders from the LEFT of the bike)While the fuel is draining out,tap the fuel bowl.Next re-tighten the carby drain screw and see how that goes.I would suspect your bike has a vacumatic fuel tap that has 3 positions on it.1 marked on, 1 marked res, 1 marked pri.If the fuel leaks occur when in the on or res position this means part of your problem is a leaking diaphram in the fuel tap.Replace this & when engine isn't running,no fuel can flow to the carby when it's in the on or reserve positions.After ensuring the tap is ok, and trying the first trick,if it still leaks,well then you'll have to pull off the carby and give the needle and seat a clean.
Hope this healps Regards Andy Porrelli
Posted on Nov 23, 2009
Sounds like the float is sticking, you can get card cleaner from motor shops that you spray inro the airbox (remove filter first)while running the engine, otherwise you will need to remove and clean the carb.
Examine idle and main mixture adjustment screws and O-Rings for cracks and damage. Check inlet needle and seat for condition and proper installation. For detail about carbs check here-->
Posted on Dec 22, 2009
Your model 95 or 96 VF750 Magna does not have a fuel pump. I believe the part you are talking about is the vacuum fuel petcock assembly. The part is only sold from Honda as an assembly.The part number is # 16970-MZ5-003 and runs about $120.
Posted on Apr 10, 2011
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