Rejetting after 426?

[FoxRacing81]

Hey guys.

Okay, before the 426, I only had
White Brothers R4 Slip-on, K&N Filter, Hotcam Stage 1, and Ported/Polished head. My carb was jetted for that.

Now my setup is this
White Brothers R4 Slip-on, White Brothers Filter, Ross 11:1 Comp. 426 piston, Hotcam Stage 1, and Ported/Polished head....

Will I need to rejet because of the piston? I believe I will I am not sure though.

Thanks
-Justin

[Colby@C&DRacing]

If your jetting was correct before you will need to go up one to two sizes

[jak1389]

would i have to rejet after a 416? i just ordered from you yesterday, je 10.8:1 comp piston, port and polish, 3 angle vavle job, hot cams stage 1, and some other parts but i think these might change the jeteting requiremnets. thanks

[FoxMxRiders]

you should check your spark plug and rejet it

[2004exrider]

since you ported and polished it i will have to say you probly will.