Does anyone make a kit to switch engines?

[cummins]

Just wondering if anyone made a kit with all of the stuff needed to put a crf 450 engine in a 400ex or 250r frame. Is this even possible? If anyone has done this or knows of a kit out there let me know post pics if you have any.

[bradley300]

there are tons of 400ex/250r's with 450 dirtbke motors. i'm not sure if anyone makes a kit but there are a few aftermarket frames made to accept 400ex componets and a 450 dirtbike motor

[mini mouse]

yeah I no someone has them. maybe not full kits but motor mount and pipes and stuff. don't remember there names tho.

[400EXracer74]

ive heard of full kits that include the engine and all the mounts for like 3000$ i just forget what companies make em. maybe call around to a few aftermarket quad shops like K and K or walsh or some big company like that maybe they can help ya find out. but im looking into that too. hey do you know if the CRF engine is liquid cooled or air?

[cummins]

I think it is liquid cooled

[mini mouse]

yeah liquid cooled