Carb dumping fuel

AKV

AKV

XS650 Member
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Hi everyone all of the sudden my left side carb is spewing fuel. I have gas tank fuel valves so I can shut off both sides of the tank. However, when I turn the valve on, gas is spewing out of the tube that goes from the side of the carb down to the ground. Any ideas? Thank you!
 
Likely the float valve is stuck open, letting the carb overfill. It can be temporary as a spec of dirt, or stubborn from gummed fuel from storage, or even a worn valve. Aside from the obvious danger, there's also the possibility that the fuel can enter the crankcase oil and contaminate that too
 
I had this 3 months back. Tapping the bowl with the plastic handle of a screw driver solved the problem in a couple of seconds. When I restart my bike after a long Winter break I plan to routinely tap the bowls as a precaution.
 
I tried that but still no dice. Can I get access to the float bowl without removing the throttle body? And if I need to remove the throttle body to get the carb off the bike and take it apart to see what’s going on anyone know how to do that? Any videos out there? Thank you everyone!!!
 
If the bike has been sitting, it might be a gummed valve rather than a speck of dirt or rust, so carb removal is the only real way to deal with that. Assuming stock CV carbs: remove air cleaners and throttle cables, loosen intake clamps. Remove the cam chain adjuster cap. Wiggle and rotate carbs downward and out the left side of the frame - sorry no video.
 
I see from looking at a past post of yours that those carbs you have are the PWK knock-offs. They are nicknamed "pukes" and I see they are living up to that, lol.
 
There are a few upgrades around: PWKs like you have, Delortos and VM 34s are popular upgrades. Otherwise go back to stock and hunt around for some BS 38s/34s. VM 34s and Mikuni flat slides are a popular choice and being Mikuni spares are readilly available for both. However, it appears you don't know an awful lot about fixing things, so I'd take it to a bike shop or if motivated enough, start learning by doing it yourself. Just remember, it's a bike, not rocket science, quite simple really, and there's not too much around simpler than an XS650.
 

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