what do yuo guys think

[Adrenalinerush]

how would a 250r dirt bike engine be in a 400ex? do you guys think that it would wokr or do you think it would be a waste of time. if thta won't work i iwll proboaly go with a 426 or 450 but i was just wondering about a 250r engine

[Quadude32]

I m not really sure if it would fit or not and if you did manage to fit it. I think it would shake your fillings out do to its not counter balanced i d go with the 426 or 450 idea if i were you

[kruzofman]

well service honda make a kit for the 400ex that puts a 250r ingine in it i thinks it www.servicehonda.com not sure but it hauls *****:)

[CowsBitePeople]

there was a thread in the open forum on the service honda 250r's in the 400 frame, they said they were SICCKKKK!! do a search there were pics to