Join Date: Jun 2008
Location: Cincinnasti, Ohio, USA
With the petcock, you want to make sure the fuel is shutting off when youturn the bikeoff.Look down inside the carbs to see if there is still fuel squirting in. It opens with vacuum and closes without so the pressure from the tank doesn't keep forcing it through.There was no sign of external leakage this time. Just saw the fuel continue to run into the carbs. At first, I thought I had dirty float syndrome whichboggled me since I just rebuilt the carbs, new fuel lines, cleaned the tank, new fuel pump and filter.
I'm sure someone will correct me if I'm wrong, but the petcock regulates the fuel pressure while your riding depending on the throttle/vacuum. At idle, you have less vacuum so the petcock is not completely open slowing the fuel down. If it's not working properly, you're getting too much fuel bogging it down and possibly giving you the problem your having.
Start with the easy stuff first. Like you said, seafoam, fuel filter.......
You may want to check your battery too. A bad battery will cause the bike to run rough. I learned that the hard waytoo. I did all the above, and believe it was my dead dry battery. I'll never know, just suspect.