best frame?

[woodsracer144]

ok whats the best frame to run with like a yz426f or a yzf450, if the 400 was cheap i would get that but im leaning more on the 426,
i know the 400 and the 426 mount up the same, but whats the best frame to run it in?
the 400ex? 250r?

what are the max Hp. that you would get our of a 426? and what would a ESR 265PV put out? lookin to racing this year....


thanks!

[250x_kyle]

an aftermarket 250r geometry frame is a good place to start. the 250r out handles the 450s nodoubtedly but is a two stroke. this is part of the reason why so many people built hybrids. walsh,leager, realy any aftermarket frame would be good. the yz 400 and 426 motors are basicaly the same other than bore size.