Upgrade your motorcycle's performance with this complete cylinder kit assembly designed for EFI 170cc and 200cc 4-stroke GY6 engines. The precision-engineered cylinder features robust dimensions of 90mm height and 69mm width, with a 62mm bore diameter, ensuring optimal compression and power delivery. This comprehensive kit includes all essential components - cylinder head, piston, rings, gaskets, and mounting hardware - for a complete top-end rebuild. The durable aluminum construction with precision-machined cooling fins provides excellent heat dissipation during operation. Perfect for rebuilds or performance upgrades, this cylinder kit is manufactured to exact specifications for proper fitment and reliable operation. The kit's design incorporates advanced engineering to enhance engine performance while maintaining reliability. Installation requires mechanical knowledge, and proper torque specifications must be followed for optimal results. Compatible with various GY6-based motorcycles and scooters utilizing 170cc and 200cc engine configurations.