Minarelli 2-Stroke 50cc Engine Rebuild Kit- 40mm

Factory Performance: 50cc Minarelli 2-Stroke Cylinder Rebuild Kit Restore the compression and smooth power delivery of your scooter with this Complete 50cc Cylinder Assembly . Specifically engineered for Minarelli-style 2-stroke engines, this kit provides a direct, OEM-equivalent replacement for riders looking to refresh a tired or seized engine. From the precision-honed 40mm bore to the high-tensile rings, every component is designed to provide a perfect bolt-on fit without the need for machining or complex modifications. Comprehensive Top-End Kit 40mm Precision Cylinder: Cast from high-grade iron for superior thermal stability and wear resistance, maintaining factory-correct tolerances. Complete Piston Set: Includes a lightweight aluminum alloy piston, two high-compression rings, a 10mm wrist pin, and secure circlips. Full Gasket Set: Comes with a cylinder head gasket and base gasket to ensure a leak-free seal and optimal combustion pressure. Direct Bolt-On: Calibrated to match original factory porting, ensuring your scooter maintains its original fuel efficiency and throttle response. Comprehensive Fitment Guide This kit is designed for the Minarelli (Horizontal or Vertical) 50cc 2-Stroke engine platform (1PE40QMB / 1E40QMB): Brand / Engine Compatible Model Series Genuine Scooter Co. Buddy 50, RoughHouse 50, Black Cat 50 Yamaha Zuma 50 (Pre-2012), Jog 50, Vino 50 Adly / Hammerhead Fox 50, Jet 50, Muddy Bug 50 Chinese Clones Most 50cc 2-Stroke "Jog" Clones and ATVs Technical Specifications Bore Size: 40mm (Stock 50cc) Wrist Pin Diameter: 10mm Cooling Type: Air Cooled Material: Cast Iron Cylinder / Aluminum Piston Mechanic's Note: Loss of power or difficulty starting is often a sign of worn rings or scored cylinder walls. Installation Tip: Before assembly, apply a light coat of 2-Stroke Oil to the cylinder walls and piston rings to prevent a "dry start." Pro Tip: Always verify your wrist pin size before ordering; while 10mm is the standard for most Minarelli engines, some high-performance cranks use a 12mm pin! SKU: 1100-1250 Vendor: Scooterworks Genuine Scooters: Buddy 50, RoughHouse 50, and Rattler 50. Yamaha: Zuma (YW50) '02–'11, Jog. Adly: Fox, Jet, Noble, Thunderbike. Eton: Beamer, Matrix, PN2B, PN2C, SF1A Daelim: Cordi, E-Five, S-Five *This product is intended as an OEM equivalent for listed models. Any misuse, alteration or alternative application is prohibited by law.