Ok, I know it can be done, I have seen it. I have narrowed the engine down to these years 89,90 and 91. These units were air cooled with a oil cooler, no more water cooling. They were rated at about 110 horse power. The one I saw was at st. anthonys, and it killed choke cherry hill like nothing. The guy said there was a person that did these conversions, but I dont know if he is around any more. What am I up against and how hard would these be...

 

It pretty much involves cutting the thing in half and re fabbing the middle around the engine. Four strokes are just taller, on my KZ/ zilla conversion I had to raise the top and lower the bottom of the frame.