I am pretty sure it is a Chinese carb after looking at it some more. In one of the pictures I can see the other side of where the choke leaver comes through the carburetors body and its got that metal looking cover that Ive only ever seen on Chinese carbs. would a 30mm even work that good on a stock exhaust? I reckon ill give it a shot, if it works it works. if it don't, then I guess im out 75 bucks and I can just stick it on my brothers 200s that's in dire need of a spark advancer.