RE: Zen G23LH Modify ???
NO,NO,NO!!
Mike, this ain't the same engine that zenoah makes for R/C...it's way down on power, about the same as the little echos and you already have some of those, no?
put that go-ped back together and you'll have a blast! the brake rotor is just steel plate and the engine doesn't need a pull starter if it has a spindle drive, you can push-start it no prob. over here i can get a nice pair of 12" pneumatic tires and wheels with ball bearings for under $40 so you should be able to find something similar too...
dave