jetting for my trx450r

[TRX450RKEN]

i have an 05 trx 450r i have a prodesign air kit with k/n filter no airbox lid where should i start with tuneing? thanks

[drider]

Stock jetting on TRX450r is 118 main jet. So with your upgrades get a 125 main jet. It'll run good.

[TRX450RKEN]

125 is big enough?...main jet change too?