I am very frustrated t this point I sealed up the carb just the way Norm describes. The bike is hard to start once its started it runs great. I tested with WD40 and no changes in idle, when I open the choke completely it does not stall immediately in fact sometime it does not stall at all with the choke open all the way I have been running the engine at mixture of 32 to 1, I was about to change to 20 to 1. I looked at my plug and it was black and oily I just changed my carb and intake manfolld to new ones, the old carb was defective. I will not use the bike to drive to work untill I am sure this is not a vapor leak. Does anyone have any ideas ? of what is going on with my bike?