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S&S Cycle Royal Enfield 650 Twins 865cc Big Bore Kit
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Estimated Ship Date: Dec 17, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
920-0145
Part Type:
Product Line:
Summit Racing Part Number:
SSY-920-0145
Cylinder Included:
No
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:
No
Cam Chain Tensioner Gaskets Included:
No
Exhaust Gaskets Included:
No
Valve Cover Gaskets Included:
No
Quantity:
Sold as a kit.
Notes:
Cylinders require machining for sleeve installation.
S&S Cycle 865cc Big Bore Kits
S&S Cycle 865cc Big Bore kits are ideal for Royal Enfield 650 Twins. Designed for closed course racing competition, the kits include pistons, rings, pins, and sleeves. The high compression pistons feature a 7cc raised dome to achieve a compression ratio of 11:1 (from 9.5:1). Higher compression is a key factor in increasing performance.
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Some parts are not legal for use in California or other states with similar laws / regulations
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