GY6 Scooter Engine Long Case - 50cc, 80cc or 100cc

You have the option of getting this engine in 50cc or 80cc or 100cc with the big bore racing engine.  This is the 4-Stroke complete engine, short crankcase.  For the 80cc big bore engine we install a 47mm cylinder and piston.  For the 100cc big bore engine we install the 50mm big bore cylinder and piston.