I have had more luck changing yamaha parts out with the chinese atvs like WITH 150-400cc engines. As for the 50cc-110cc i'm still trying different parts myself.I've used a starter from a 90cc honda on a 110cc chinese engine(lifan).

 

This is good stuff for people to know.
Maybe someone should start a thread about it and start lists of what parts are compatible from which manufacturers, etc...
I for one would like to know what other parts I can use for our 110's (in case I need to buy a part locally, or don't have time to wait for shipping)