engine exchange

[jrb400ex]

I was wondering how hard and/or expensive it would be to exchange my 400ex engine with a Banshee or Raptor engine. Also which is better the raptor or banshee motor.

[ss440ex]

Or with like a yx engine??
yz426f??

[94F450SD]

have you done any mods to the 400 engine yet?if not do some first.i got a HMF slip on pipe,uni air filter,hot cams stage one and jetted it.and holy crap doe sit run now.especially after i put the cam in.it has almost the lowend power the 660 raptor has.besides my steering stabilizer the cam was another money well spent item

[JW450R1]

i had a 400ex with dome piston,cam,fmf,jet kit,rev.box,some port and polish,with sus.done.i was very happy with the honda.