Engine Kits & Rotating Assemblies

S&S Cycle 84-99 BT w/ Stock Heads 3-5/8in Bore Cylinder Set - Natural

Part Number: SSY-91-7000

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

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• $10 Summit Bucks
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2006 Dyna 91cc w/ .032in Manifold Surface Rear Head Assembly

Part Number: SSY-106-3411

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

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• $10 Summit Bucks
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S&S Cycle Royal Enfield 650 Twins 750cc Big Bore Kit

Part Number: SSY-920-0144

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

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• $10 Summit Bucks
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S&S Cycle Royal Enfield 650 Twins 865cc Big Bore Kit

Part Number: SSY-920-0145

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

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• $10 Summit Bucks
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ENGINE PERFORMANCE, 99-06 BIG TWIN 124" 4-1/8" BORE, CYLINDER SET 4-1/8" BORE 124"

Part Number: SSY-910-0255

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

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• $10 Summit Bucks
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ENGINE PERFORMANCE, 124" 4-1/8" BORE, CYLNDR ST 4-1/8" BR 124"

Part Number: SSY-910-0401

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

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• $10 Summit Bucks
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ENGINE PERFORMANCE, 17-18 M8 MODELS, BIG BORE CYLINDER SET BLK

Part Number: SSY-910-0682

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

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• $10 Summit Bucks
• Special Order

ENGINE PERFORMANCE, 17-18 M8 MODELS, BIG BORE CYLINDER SET BLK

Part Number: SSY-910-0683

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order