I have an 04 trx 450 with a stage two hot cam white brothers full exhaust, open air w/ K&N and of course been jetted, i am looking into boreing it out, how high should i go with the comp? also what are the power gains with a athina kit? is there a core return with cylinder? also is it worth puting in a new/ stroker kit compaired to a just a high comp pistion. i race flattrack and i know i am already at a disadvantage with it already not being a true 450. Thanks a lot!!

 

It is a true 450!
I have the Athena 480 kit and I love it.
Stage II Hotcam, full Yosh system and ported and polished head.
Love all the power