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  1. FDChappy

    CT90 Lifan 140 needs more top speed

    Hello I built a CT90 with a Lifan 140 from DrATV. The engine is bone stock except for a kevlar clutch upgrade. It is still using the carb that came with it which is a Sheng Wey pd17 also PZ-26. The main jet was a bit rich so it is now running a 93 instead of the 94.5 that came with it. The plug...
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