what size jetts for a white bros full system for a 300ex

[exrider360]

i just baught a white brother silencer nad im ordering a head piep waht size main jets should i get is there a difference between the winter and summer. IF so what sizes shoudl i get for teh wionter and summer maint jetts. for a 300ex

[sweet300ex]

try a 125 or 128 main

[josh]

one guy told me his 300ex was perfect with a 128 main in it on a full exhaust system, my 250x is about the same thing, start at 125, then try 128-130, shouldn't really be bigger than 130 depending on your elevation

[exrider360]

would a 132 main jett work

[hondarider2006]

put it in, and see if it works! You can only try and see what happens. If it's to rich, you will know it. I put a 170 in and I was to rich, and it ran like crap when I hit the gas.(this was for a 400)