need some motor help

[bikebuilder]

i have a 02 crf450r that is going into a 2002 400ex frame. i am rebuilding the motor rite know, and was thinking of going with +2 piston that is 12.5:1. need help with what valve parts to go with and what stage cam to use?

[kodymx13]

depends on how much you want to spend. i personally run stock sized stainless valves. and have gotten a year+ out of them and still look fine. TI valves are lighter and quicker revving but more pricey. and the cam.. some will disagree with me but id leave it. the earlier model crf cams were great. for a long time if you called up sparks or baldwin theyd send you a early stock honda crf cam.