S&S Cycle 910-0690 1250 cc Conversion Cylinder Kit for Harley Sportster - Silver

Cylinder Kit - 1200 cc Conversion - 11.2:1 Compression Ratio - Silver - XL

Upgrade your Harley Sportster with the S&S Cycle 910-0690 1250 cc conversion cylinder kit, designed to enhance engine displacement from 883 cc or 1200 cc to a robust 1250 cc. Crafted with precision, this kit features forged pistons that include larger valve pockets capable of accommodating valves up to 2.00 inches, ensuring optimal airflow and performance. The coated piston skirts with measurement windows and the S&S logo facilitate easy inspection and reliable operation. Installation is straightforward, as no machining or rebalancing is required, allowing for a hassle-free upgrade that minimizes downtime.
Included in the kit are the S&S 1250 cc pistons with rings and wristpins, along with 3-9/16 inch bore cylinders, MLS head gaskets, base and exhaust gaskets, assembly lube, and detailed instructions. These components are manufactured in the USA with high-quality materials to ensure durability and longevity. Please note that this kit is incompatible with XR1200 models. Additionally, 883 models will need to utilize XL1200 cylinder heads to achieve the proper compression ratio for optimal performance.
For maximum gains, consider pairing this kit with CNC ported heads, performance cams, and upgraded exhaust and intake systems. The 11.2:1 compression ratio provides a significant boost in power and torque, making this upgrade suitable for riders seeking enhanced performance and responsiveness. Whether you're restoring an older model or building a high-performance custom, the S&S Cycle 1250 cc conversion kit is a reliable choice for serious Harley enthusiasts.

Features:

• Converts 883 cc and 1200 cc Sportster models to 1250 cc displacement

• Forged pistons with larger valve pockets accommodating up to 2.00 inches valves

• Pistons feature coated skirts with measurement windows and S&S logo

• No machining or rebalancing required for installation

• Includes pistons, rings, wristpins, 3-9/16 inch bore cylinders, MLS gaskets, assembly lube, and instructions

• Made in the USA for quality and durability

• Requires XL1200 cylinder heads for 883 models to achieve correct compression ratio

• Recommended to pair with CNC head porting, performance cams, and upgraded exhaust and intake systems for best results