Re: 100cc Yamaha
I think "ruined" may be exaggerating a bit. There isn't a lot of demand for a 2 stroke 100cc motor with only a four speed tranny. The engine appears to be mounted in such a way that it is a stressed member, or part of the frame like on Indy cars.
“You're only young once, but you can be immature as long as you like" -Unknown