$1,077.95

S&S Cycle 86-21 Sportster Models High Compression 1250cc Conversion Kit - Silver
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S&S Cycle 1250cc Conversion Cylinder Kits 910-0690

S&S Cycle 1250cc Conversion Cylinder Kits 910-0690

SSY-910-0690

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Part Number: SSY-910-0690

Estimated Ship Date: Dec 16, 2026

$1,077.95

Estimated Ship Date: Dec 16, 2026 Would you rather pick it up?

Overview

Brand:
Manufacturer's Part Number:
910-0690
Part Type:
Product Line:
Summit Racing Part Number:
SSY-910-0690
Cylinder Included:
Yes
Pistons Included:
Yes
Piston Material:
Forged aluminum
Piston Rings Included:
Yes
Wrist Pin Included:
Yes
Wrist Pin Bearing Included:
No
Head Gaskets Included:
Yes
Base Gaskets Included:
Yes
Cam Chain Tensioner Gaskets Included:
No
Exhaust Gaskets Included:
Yes
Valve Cover Gaskets Included:
No
Quantity:
Sold as a kit.
Notes:
Kit features silver cylinders with a 3 9/16 in. bore and 5.5cc dome pistons.

S&S Cycle 1250cc Conversion Cylinder Kits

The S&S Cycle 1250cc conversion cylinder kits are suitable for a range of Harley-Davidson® models, including the Sportster, which can benefit significantly from the added power. These cylinder conversion kits provide a significant increase in engine power and torque compared to the stock engine, making the bike significantly faster with a more noticeable acceleration, especially on smaller models like the Sportster, while often being a relatively cost-effective upgrade that can be done without major engine modifications or requiring a complete engine rebuild. This is particularly beneficial for riders seeking more power without drastically changing their bike's character. Each kit is tailored with the necessary components for your specific bike model. Many 1250cc conversion kits are designed to be installed without requiring major engine modifications, making them a good option for DIY mechanics. In most cases, you can use your stock cylinder heads, cams, and other engine components with a 1250cc conversion kit. Select the kit designed specifically for your HD® model and engine to ensure proper fitment.

Applications

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