Modified cylinder block assembly 50 mm bore 100 cm³ compatible with the GY6 engine upgrade kit, including cylinder block/piston/rings for performance enhancement accessories for scooters and motorcycl

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.