I recently rebuilt my vacuum fuel valve. When I bought the bike it was gutted and stopped up. With the new parts it seems to work when the engine isn’t suppling vacuum but the bike will run for miles with the petcock set on off. I’m sure the valve is correctly assembled but cant figure out why it will allow fuel flow while on off with bike running. Any ideas anyone? Thanks
Check page 2 of this thread.... it might help. http://vfrworld.com/threads/replacing-needles-seats.54366/