Mine used to have a scary buzz over 7,000 with the stock 20mm carb and intake. I put on a 24mm Nibbi and hogged out the intake manifold with a die grinder to match the gaskets. No more buzz and pulls strong past 8500. With the cat out (yes, there is one in that thick spot in the pipe--found it installing the bung for the AF meter) and the carb jetted to 13.5:1 at full power, it runs 69mph in a full tuck on a 1/2 mile flat straight-away with a 17-tooth sprocket.
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2021 Baodiao BD125-11: 17mm front sprocket, 24mm Nibbi, cat removed, air/fuel meter installed, Emgo travel trunk. Daily driver.
2014 Ninja 1000, 1979 Harley Roadster, 1984 GS450 and 2 TU250Xs in current stable.
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