@katoranger-Yes I have the title
@weldangrind-I do not have access to the original engine. The guy made a "junk run", with all the original parts he removed, the day before he remembered I was craving a bike.
I would love to source the original OHC 250 that went in it, but i can't get any Hensim specific info with my searches. As you said, I have found the crank and pistons and big bore kits ad nauseum. So plentiful are they, I wouldn't be totally opposed to snagging a burnt up 250 and doing the rebuild myself.
A side note, do any of you have any experience with these in high altitude? I'd love to make my way through some of these mountains with this thing.