dragonforce

Hi. I'm new to this forum and my english is pretty bad so im sorry about it. I just bought a 2001 banshee last week ago and I have a question about winter jetting.The guy who sold me the bike told me that it was jetted (His bikeshop jetted it for him with a dyno)for summer and he never used it in cold weather. mod main jet is 360 needle on the 4th clip from the top(so its the 2nd richest setting) pilot jet: didnt check it yet (im assuming its 27,5) t5 pipe tors removed stock airbox with lid on but there is a hole on it. cool head from pro design porting: (dont know what kind) k&n filter the weather in winter is around -4 / 14 F or - 10 / -20 celscius and in summer its around 70 if you wanted to know. I dont know my elevation, but its not really high from sea level. I was thinking of trying 390 main jet or maybe 400. What do you think about it? And what about the needel. Do you think I need to move it to the richest setting? And what pilot jet should I be using? one size bigger or more than the one I have right now? Can I blow off my motor if the pilot jet is too small? thank you very much guys! oh and happy new year btw!