I have a 68mm piston kit with fmf pipe open air box stage two reeds mikuni carb when I'm in let's say 3rd gear and I smash the gas to make a jump it bogs down bad I have a 290 main in now is that my problem am I running it to rich and basically flooding the carb when this happens?? Also the tune is not as specified fuel air screw has to be al.ost 3 turns out for a higher idle then I adjust my idle screw to slow the idle down....it's been making a pinging sound and it can't be right?? Not knocking pinging is this all due to running rich and main jet size? Please words of knowledge please