ya those bikes are great, but when you put in an atv frame the vibration gets reeaal bad. im not sure where 1 saw it but with a little modifying you can bolt the cr500 jug rite up to a 250r bottom end, i think.
it might hve been atvsport mag or dirtwheels.

o ya i forgot to say that the 250r bottom end is used because it has a counter balancer and that gets rid of most pf the vibration

 

i've heard of guys doing the same thing before w\ the 250r bottom end
but back to the bike my friend owned one and on 1100 ft ice drags he was doing 96mph

 

I got one ia a 250r chassis

 

and its very nice

 

thanks Eric . the bad thing about mounting a cr500 cilinder on a 250r is that the clutch and trannie never hold up (and its very costly). The 250r trannie and clutch is actully from a 125 dirt bike motor and the cr500 is from a 250r dirt bike. There is a new power valve 500 cilinder kit being tested that bolts on to the 250r bottom end.

 

so doing what you did what would the average coast you think would be? hey maby ill try and get one in my 400ex..lol or not

 

If you do it your self it would be cheap. Like a coulpe hundred bucks, but I had to get a custom tank wich cost $550.

 

I have a cr500 motor in my suz lt250 frame also. They make awesome power but do have some vibration. Mines not as bad as everyone says though I can ride it all day long without any problems