RE: A GLH for 2012
That's a really cool looking chopper project..!
The only "chopper" I ever built was out of a bicycle frame with a 31 cc Ryobi weed eater engine and spindle drive. It was something like 60:1 drive ratio out of a 7000 rpm IIRC.
I tried the same idea with a Husqvarna 55 cc and it shredded tires too often.