Changing the sprockets would be the first thing to try. If it cannot pull a higher gear the normal intake and exhaust mods might help. It says 15 HP!? that cannot be true as my
170cc fuel injected scooter only make 15 HP. Matching the tubes going into the engine and a mild port job might give you a touch more power. Use thin synthetic oil and a iridium spark plug will help too. Use what you got! Enjoy it!
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