View Full Version : Crf Yzf Kxf Difference?

01-23-2007, 05:21 PM
Whats the major difference in putting a yzf crf or kxf 450 motor into a 400ex frame modified for a crf motor but id like to maybe do a kawi or suzuki cuz its hardly ever done?

01-24-2007, 04:00 PM
in the newest dirtwheels, they put a kx450 engine in a yfz450 and said they only had to make new mounts...

01-24-2007, 04:33 PM
i sese that i bet that thing is unreal it looks real nice too. are all new bike engines 4 speed like that one is?