They should but why? They are sized for a 49cc engine. Yes the same applies to shift levers, intake & carb... You are looking at 2.25 the displacement so you need to plan to feed and exhaust it accordinily or it will run like crap. If you would like Lifan parts for a 125 such as big bore performance exhaust, big intake & carb etc... I can supply them as can some other site if you shop around.
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