Bad fuel valve?
I just got a call from Carbworx. Steve said my carbs looked good and only found that they had the incorrect main jets in them. I'm not sure that addresses all my issues though. What I'm seeing is
1) Very inconsistent idle. Sometimes I'll come to a stop sign and get 1500 RPM, sometimes 800, sometimes 400 and sometimes it won't idle.
2) If I run the throttle open for a bit just standing I'll blow black smoke and then it will idle ok for a couple seconds
3) I can't take the choke off when the bike is running. It sounds odd but even once its warmed up taking the choke off will kill the engine. So I take the choke off, then restart and it fires up and runs fine.
4) I can't add any throttle with the choke on. Cold or warm if I increase the throttle at all the bike will die.
So Steve suggested I might have a bad fuel valve. Anyone seen this before? I've thought about perhaps replacing the valve with one that has a "prime" position so I can discount issues with the vacuum diaphragm. Suggestions??