now i have got my car on the road im building a monkey bike and i need a honda c90 engine
anyone got one or seen one going for not alot of money

This one?

Here

Cant help finding one, other than to suggest also looking at karting sites, great engine however.

use a pit bike engine, i have a stomp yx 140 which is pushing out a BIG 14hp!! but really goes great in such a small bike. be even better in a monkeybike, it revs like mad too!

HTH

Rob