100cc Big Bore Cylinder Kit for Eton Viper 90 90R RXL-90 AXL-90 2-Stroke ATV - Piston Gasket Set

This 100cc big bore cylinder kit provides a substantial performance upgrade for Eton Viper 90 series 2-stroke ATVs. The complete kit includes a precision-machined cylinder, high-compression piston, piston rings, wrist pin, and full gasket set - everything needed for a complete top-end rebuild. By increasing displacement from 90cc to 100cc, this kit delivers noticeable improvements in torque and horsepower throughout the powerband. The plated cylinder bore offers excellent heat dissipation and wear resistance, while the forged piston withstands high-RPM operation. Installation is straightforward for those with mechanical experience, requiring only basic tools and approximately 2-3 hours. This upgrade is ideal for riders seeking increased power for trails, dunes, or recreational riding while maintaining reliability.