back in 99 my father got a brand new banshee he kept it stock all that year, during the winter he had the top end rebuilt at one of our local dealers. they also installed a set of FMF fatties, turbine core 2's,Pro Tech over size air filter adapto,K & N filter, modified drilled out air box cover, white bro's boost bottle, and FMF carbon fiber reeds for him during the rebuild. the bike was only riden during the summers of 1999 and 2000 so its been sitting up for a couple years. I decided to buy the bike off him I'm in the processes of rebuilding the topend and I noticed minor pinging on the left piston. I'm not 100% what the stock jetting was on this bike(because I never owned or worked on one.) but it has 240 main jets. my question is does different brand jets number differently? because everyone I hear have like 300+ mains so I wasn't sure what the deal was well I'm going to change out the mains but I'm not sure whats a good base line to start off with.. I live in michigan my area is around 500+ above sea level..