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S&S Cycle 103 in. Sidewinder Big Bore Stroker Kits 91-9140
Part Number: SSY-91-9140
S&S Cycle 103 in. Sidewinder Big Bore Stroker Kits
S&S Cycle 70-84 BT 103in Sidewinder Big Bore Stroker Kit - Gloss Black
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Estimated Ship Date: Dec 17, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
91-9140
Part Type:
Product Line:
Summit Racing Part Number:
SSY-91-9140
Cylinder Included:
Yes
Cylinder Heads Included:
No
Bore (in.):
3.625 in.
Crankshaft Included:
Yes
Camshaft Included:
No
Connecting Rods Included:
Yes
Pistons Included:
Yes
Piston Rings Included:
Yes
Wrist Pin Included:
Yes
Wrist Pin Bearing Included:
No
Head Gaskets Included:
Yes
Base Gaskets Included:
Yes
Lifters Included:
No
Cam Chain Tensioner Gaskets Included:
No
Exhaust Gaskets Included:
Yes
Valve Cover Gaskets Included:
No
Quantity:
Sold as a kit.
Notes:
Cylinders feature a gloss black finish and stock cases must be bored.
S&S Cycle 103 in. Sidewinder Big Bore Stroker Kits
S&S Cycle offers 103 in. Sidewinder Big Bore Stroker kits for a variety of Harley-Davidson© street bikes from the 1970s and '80s. These kits are an economical route to a larger displacement engine. They contain nearly everything needed to take a stock 74 in. or 80 in. H-D© shovelhead engine up to 103 in. displacement. Kits include S&S 3 5/8 in. bore high tensile cast iron Sidewinder cylinders and forged pistons with wristpin and rings, a 5 in. stroke small diameter dynamically balanced S&S flywheel assembly, complete with S&S heavy-duty connecting rods and mainshafts, S&S stainless steel headbolts, base nut, S&S adjustable chromoly steel pushrods, head gaskets, base gaskets, exhaust gaskets, and an S&S heavy-duty top motor mount. Compression is 9.7:1.
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