I bought my friends 2001 wr250f which ran great before it sat for over a year. Now it barely runs. The pilet jet was gummed up really bad and I replaced that. Bike still runs crappy though, even with new gas. I've noticed also that the accelerator pump doesn't squirt anymore either. My question is, what is the best way to totally clean a carb? Should I soak it in something? Do I need to remove the rubber and plastic parts before I do this? Any other tips?