Originally Posted by FFV8
Guys look closer, thom's bike is not a China Girl.
i would call it a "China Case" - that is basically a racing Moped engine stuffed in there. Moped reed valve cylinder (not a ching chong 3 port with bad timing) parked on top of the Moped crank with about 4mm more stroke. He is at 78cc's or so. Yes, it will spin to 13,000 rpm I would love to see the dyno sheet.
How about some actual specs on the engine thom?
The spec of this cylinder matched with the exhaust should be arround 16-18hp peak at 10.000rpm. I adjusted the squish 0.50mm (0.020inch), i removed about 0.005 inch from the head, and made a little bit of magic inside the port. I beleive it should be arround the 18hp.
dyno of similar setup with same cylinder are about 10whp (a lot of loss due to the belt of the scooter)