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S&S Cycle 1200 cc Conversion Cylinder Kit for Harley Sportster Models - Silver, Part #910-0690
Regular price $1,077.95 USD
Cylinder Kit - 1200 cc Conversion - 11.2:1 Compression Ratio - Silver - XL Upgrade your Harley-Davidson Sportster with the S&S Cycle...
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Cylinder Kit - 1200 cc Conversion - 11.2:1 Compression Ratio - Silver - XL
Upgrade your Harley-Davidson Sportster with the S&S Cycle 1200 cc Conversion Cylinder Kit, designed to enhance performance and reliability for models from 1986 to 2021. This kit transforms your existing 883 cc and 1200 cc Sportster engines into a 1250 cc displacement setup, providing increased power and efficiency. Featuring forged pistons with larger-than-stock valve pockets capable of accommodating up to 2.00-inch valves, this kit is engineered for high-performance applications. The coated piston skirts include a measurement window and the iconic S&S logo, ensuring durability and visual appeal. Installation requires no machining or rebalancing, making it a straightforward upgrade for experienced mechanics and enthusiasts alike. The kit includes high-quality S&S 1250 cc pistons, rings, wristpins, 3-9/16-inch bore cylinders, MLS (Multi-Layer Steel) head, base and exhaust gaskets, assembly lube, and detailed instructions, all made in the USA. This conversion kit is not compatible with XR1200 models, and 883 models will need XL1200 cylinder heads to achieve the correct compression ratios. For optimal performance, it is recommended to pair this upgrade with CNC head porting, performance cams, and exhaust and intake modifications to maximize power gains and efficiency. Whether you're seeking increased horsepower or improved engine response, this kit provides a reliable foundation for a high-performance Harley Sportster engine upgrade.
Features:
- Transforms 883 cc and 1200 cc Sportster engines into 1250 cc displacement
- Forged pistons with larger valve pockets, accepting up to 2.00-inch valves
- Piston skirts coated with measurement window and S&S logo for durability
- No machining or rebalancing required for installation
- Includes pistons, rings, wristpins, cylinders, MLS head gasket, base and exhaust gaskets, and instructions
- Made in the USA for quality assurance
- Requires XL1200 cylinder heads on 883 models for proper compression
- Recommended with CNC head porting, performance cams, and exhaust/intake upgrades for maximum performance
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