i do 80 km/h with a lot of headroom left, but vibration makes more than 90 km/h unpleasant. the power increase is very noticeable in acceleration.
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1971 Garelli Gulp 50cc with open ports and 16 mm Bing Carbie + 1980 Honda XL 223 ZS + 2007 Zongshen LZX200G + DR400SM
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