crf450 engine

[H-Bomb09]

I wanted to put a CRF450 engine in my 400ex but dont really know what work it has to have and how much its going to cost? Has anyone one does this and if so can you tell me how much you spent and if it was reliable or not? thanks

[blue416ex]

do a search i just saw a practically step by step guid eon here did it the y had whte fenders and a blue frame the frames for sale now n there ws a link in it to the step by step look there