It's a vacuum-operated petcock, so when the engine stops, the fuel stops. Somewhere between the vacuum port on the carb or throttle body and the valve in the petcock, it's gone wrong. Plugged vacuum line, fuel valve, stuck diaphragm, and perhaps something else has stopped it working.
found the cap was plugged up good, opened the orifice with a drill.
Still stutters, but it seemed to help a bit.
Good idea with the open the cap thing! heh heh!
How about cracked carb boots? could that do it?
I might need to clean the carbs out with a tool...
wanted to post this pic of the paint job... it is gunmetal black and orange metal flake, over Canyon Brown Poly(obsolete). the rest of the bike is oxide red and yellow mix....I used the same flash on it, and is just looks bad!!!!
I think it looks wild
float level was off, so i pulled the carbs again today...
the manual says the bottom of the floats is supposed to be 1.01" from the throttle body without the bowl gasket... yep the floats were out exactly the way the fuel level was in the test before I pulled the carbs! bend the tang, fix the rich/lean prob.