Bye Bike 47mm "70cc" Engine and Swing Arm

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  • Regular price $ 849.99
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New old stock 70cc engine for the Bye Bike series of mopeds. This is an excellent candidate for engine swapping onto another moped.

This engine has a factory 47mm cylinder kit which has the same port map as the popular Derbi Airsal kit.

Tecnigas used Top Racing parts for the scooter style transmission and Airsal reeds that are the same pattern as Tomos A35 with a pretty generous intake. These engines make excellent power as they are.

Engines are complete except for the carburetor and CDI box. We'd recommend a 19-21mm Dellorto PHBG. These engines can use most of the common Yamaha style boxes.

The swing arm needs a wheel with an axle that is 12mm in diameter and at least 200mm long. This is the version that can accept a pedal shaft but is not included.

Comes with engine, swing arm, and swing arm bolts.

These engines carry no warranty. They are sold as-is and for off-road use only. Please ask any and all questions prior to purchase.