The motor is from the chinese bike. Electric start 72cc. I used it because a) it was brand new and b) it is a 12V engine rather than the original 6V so i can run modern lights, digital speedo etc if i want.
Hasn't cost too much i guess compared to my other projects, spent about $300 on that tank in the end though, just in materials... Then theres the seat, the donor bike, the original bike etc. All adds up!
Just put a Kitaco 25t rear sprocket on it so it goes much quicker now!
My brother did the exact same thing though his is yellow.
Cheers