I think they use the same kit but the 250 will just be like a 280 or something rather then a 330 becuz of the stroke, I have a 250x and was looking at doing that also but im putting to much money into my other quad to worry about that one now

 

Powroll.com has it listed, I can't remember what the cc is. I think it is 313, though.

 

Why dont you just do the 350x conversion, it would be like a 400 plus im guessing it would be more reliable then a 250 bored to 313.

 

I am doing this job for someone, Plus I wouldnt waste one of the rarest 3-wheelers on something like this.