I have a 1986 honda 250r and a motor from a 2002 honda 929rr. I want to know if anyone here has done this sort of app and if so what are the main problems that you run into

 

i dont know of anyone who has done that, never heard of anything so crazy haha but if you get it to work, that thing is gonna be friggin nuts, you'll have fun killing yourself[img]i/expressions/face-icon-small-tongue.gif[/img] good luck

 

A 929 will probably shake that little 250 frame apart.

 

I have seen two other machines recently at the Beaverdale Hillclimb.One was a 87 lt 500 with a R1 motor the other was a 91 banshee with an r6 motor both machines were awesome allthough the r6 seemed to be a little harder to ride due to the no power bottem end of a 600.The R1 powered machine jumped the breaker of the hill further than any dirtbike including the crazy custom kz750 and kz 900 powered machines(If you dont know thats a two stroke tripple!)
Both machines seemed crazy smooth it looked as if there was little vibration.Those motors are counterbalanced.