I have had a big gun exhaust without a spark arrestor on it now for some time. I I dont have it jstted and it smokes like a hippie. I have the jet kit now I just bought the k&n filter and a new spark plug which from reading the threads is what i need ot do the job right. I am in PA at around 300ft. and im not sure which needle to set it on and which jet to use. I know what the instructions but it seems like alot of people are having alot of problems with the jetting. can enyone give me a good needle setting and main jet number for my elevation, exhaust mod, and aftermarket air filter without me having to go crazy trying alot of different things and probably breaking my quad or something on it. thanks for any help I would greatly appreciate it.