Modified cylinder block, 50 mm bore, 100 cm³ displacement, compatible with the GY6 engine upgrade kit, includes cylinder block, piston, piston rings and accessories for performance enhancement for sco

The GOOFIT 50mm bore cylinder block for 100cc engines is a performance kit specifically designed for GY6 series engines. Thanks to its precise 50mm bore, this kit allows for the upgrade or repair of standard small-displacement GY6 engines (e.g., 50cc) to achieve the performance of a 100cc engine, or the replacement of worn parts with the same displacement.