one more jetting question

[Justin330ex]

ok lol i asked what size main jet to use on my 300ex with pro ciruit t-4 pipe and i got a couple answers to go up 2 or 3 sizes
but what is stock for a 300ex

[TRX_Thumper]

stock is 122...a 130 or 132 would probably be a great starting point

[43atv]

122 is stock.my bike is bored 40 over 11.1 comp.a web cam,fmf exhaust,k&n filter and where i live is about 2000 feet above sea level and use a 130 main jet.