You are going to spend more money on getting this air cooled motor to work. You should just wait until you can afford a liquid cooled motor. The motor is better, and you won't have to worry about making the air cooled motor fit. You will have to figure out a custom pipe, and at the very least you will have to get a longer brake line to move the caliper to the other side.

 

I wouldnt have to get a custom pipe just a quad r pipe, I think the brake like will reach they are fastline steelbraded,I think I am going to sell it as a conversion and just buy a 400ex so I can trail ride and race

 

I have an 82 ATC250R and an 87 TRX 250R. The 82 has the sproket on the right side and the 87 is on the left side!