Originally Posted by Thunderhead289
im not sure if your mocking me or not, but I notice that with the bottle I can have my carb idle speed on top adjusted way down and run a richer mixture more effectively which has resulted in better pull in the top end. just my observations over the last 1400 miles.
IMO the pipe detracts from the overall look of the bike, I boosted my compression by shaving my head down and drilled a few more holes inside the baffling of the exhaust for better flow due to the higher compression and experienced very good results while still retaining a good look. - I have replaced my needle bearing due to the extra beating though. . .
Replacing the upper bearing is always a good idea in my opinion, its one of the most common points of failure in the china girl engines, adding a few extra holes in stock pipe does help with flow and something tbat makes it even better is to grind a taper around inside of the gasket flange so that it is better matched to the exhaust port.
Glad your bike is doing so well, 1400 miles shows you have a good strong engine that is being well taken care of.