
TOP PERFORMANCE Black Trophy Cylinder Kit - Big Bore (Manufacturer Ref: 9931310): a complete set designed to increase the displacement to 68 cm3 on your 50 cm3 scooter. Intended for urban use, this kit combines a cast iron "MINACROM" cylinder (with added chrome) with a wear-resistant treated piston, providing a reliable solution for big bore preparations.
The kit includes all necessary components for installation: Ø47 mm MINACROM cast iron cylinder, Ø47 mm piston with high silicon content and molybdenum disulfide surface treatment, rings (chrome for the top ring), piston pin, circlips, head, O-rings and base gaskets, screws, H2O sensor reducer, and cable ties. All materials are provided for a clean and secure installation.
Compatibility and target: ideal for big bore preparations on urban 50cc scooters. Common model examples: YAMAHA AEROX R (SA421) 2016, MBK NITRO 2016, APRILIA SONIC 50 GP 2015. Research carburation and ignition before installation for a durable setup.