The power plant is being donated by a 95 Yamaha Blaster that my dad got for me as a kid. I spent a lot of hours ripping it up on that thing and broke it more times than I can count. I was planning to rebuild it again at some point but realized that quads aren't really that cool and occupy way too much garage real estate.
I got as far as rebuilding the engine with all new top, bottom, and trans internals before I sold off the rest of the quad.
So now I have this super fresh aircooled engine waiting to drop into something fun and a beat up tiny motorcycle that needs a bunch of work.