05 450r pipe

[Foxracer37]

i got a 450r stock pipe on and and if i take out the spark arrestor what should i change my main jet to? it comes with a main jet of 118 stock i beileve

[honda300EXtreme]

i dont belive that would require a main jet change, because your not increasing the breathing capabilities that greatly,
and a 118 main jet sounds way small

[CDCHONDAS]

if you let your airbox stock it wont change much, maybe 1-2 size up if any