Well for the skinny.. I helped develpe the inner workings of the newer 4 stroke gearbox and ended up helping engineers of the Nantong Jiali Gasoline engine factory and have since helped them with US Precision refining in thier 2 stroke engines and kits and can say this they are the Factory that produced the Steel Sleeved 2 strokers and the only barrel cast they had was for a
49cc commonly known as the Starfire I know it was thier only steel sleeved engine barrell(49ccer) because I had to source a supplier of a 66 cc sleeve in order to get them to produce a steel sleeved 66, we have'nt gotten around to it. this is thee only factory I know of. Rick Shy (BGF) sourced WHAT SAID 66CC Orange or yellow labeled engine with the carb affixed directly to the cyclinder and it ran like a raped ape and by looking at the jug it looked to me to be a 49ccer But when it was ordered the customer had actually payed for in auction a 49cc sticker said 66 I remember thinking it was smalll. Anyway I think he is partially in bed with this Nantong Jiali but if He isn't there is a chance one of the 66cc ,if it actually was, could be had from him.
Plus, don't Quote me on this, bI do beleive the cast for the 49cc and the 49cc Starfire were the same but the cast had to bored out wider for clearance for the sleeve which are really thick but if you talk to wiseco send them a 66cc jug theyll tel you if you have clearance enough to bore for a sleeve. Youd need to use electrolysis process for removing the nickel (nikasil) or chrome. chrome