There are three different engine they are advertised as 50cc, 60cc, and 70/80cc. The true displacement of the 70/80cc ones are actually 67cc! so the 50cc one must be even lower i think its around 48cc, plus theres no markings so you would easily get away with it! Yeah happy time is the term, not sure where it originated from but that is the name of the chinese two stroke frame engines.
That would explain why this site is the only place on the whole internet that uses it then! I like it though, sounds like the sort of name they would give it. The formal name of my one is the Yong Xing Machine Zone 80cc. Happy time sounds much nicer,
Cant wait to see the results on that bike!
Well, I finally got the engine kit ordered from Gaijin Productions (Turbo/Chaos on this board). It should be here next week. I'm certainly looking forward to it. Gas prices are eating my lunch...and starting to eyeball my dinner too.