I have a 2001 Banshee.i bought it at the end of june. it is not only my first banshee, it is also my first quad. my friend convinced me to get it. when i got it, it was very hard to start and ran like crap. i read posts on banshee hq and did research to find out i was running lean. my banshee is mostly stock except for a boost bottle and k&n air filter, i don't think anything else was done to it. the original main jets were 200, pilot jets 25 and the needle at the third position and the air screws 2 turns out. i bought a k&n power lid. it came with 340 and 350 main jets. i followed the instructions and installed the 350 and put the needle to the fifth position all according to the instructions with the power lid.i ran it after that and it ran really good. no bogging or hesitiation when i opened it up. there was still some hesitiation on take off, like 1/4 throttle and hard to start. adjusting the air screws didn't have any effect. i have now installed 35 pilot jets and a tors elimination kit. the machine starts on the first kick without giving it any throttle and idles fine. i haven't had the chance to run it yet, i will this coming week end. my question after all this is why does my machine run good with the 350 main jets? i don't have aftermarket pipes. i read on banshee hg guys with lots of engin mods are running 300 or less.it seems that my machine should be running way too rich, but was running great. i ride in fosterdale ny which i think can't be more than 1500 altitude and the temp has been 85 or better. any information would be greatly appreciated. keep in mind i have only ridden it three times so far but my friend has had a banshee for years so he has a base to compare my performance against. thanks.