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Upgrade your Harley Davidson engine with the S&S Cycle 4-inch Big Bore Sidewinder® Cylinder Kit, model 910-0650. Designed for ease of installation, this bolt-in kit requires no machining, balancing, or splitting of the crankcases, allowing for a straightforward upgrade with the engine still in the frame. The kit features a cast ductile iron sleeve embedded in cast aluminum, which provides superior heat transfer and durability under demanding riding conditions. When installed on 88-inch engines, it boosts displacement to 100 inches, while 96-inch and 103-inch engines are increased to 110 inches, delivering a significant performance increase without sacrificing reliability. The high-performance engine features a compression ratio of 10.5:1, optimized for streetability and dependability, especially when paired with stock 85cc heads. This setup ensures smooth power delivery and responsiveness, making it suitable for daily riding and spirited performance. The complete kit includes cylinders, forged pistons, rings, piston pins, clips, and gaskets, providing all necessary components for a comprehensive upgrade. Note that this kit is not compatible with S&S 79cc heads, so compatibility should be verified prior to installation. Whether you're looking to enhance your bike's power or improve its durability, this kit offers a professional-grade solution that balances performance and reliability for Harley Davidson enthusiasts.
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