Filters
S&S Cycle offers 93 in. Sidewinder Big Bore Stroker kits for a variety of Harley-Davidson© street bikes from the 1970s and '80s. They're an economical route to a larger displacement engine. These kits contain nearly everything needed to take a stock 74 in. or 80 in. H-D© shovelhead engine up to 93 in. displacement. They include S&S 3 5/8 in. bore high tensile cast iron Sidewinder cylinders and forged pistons with wristpin and rings, a 4 1/2 in. stroke 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. Kits are available with 8.5:1 or 9.1:1 compression.
Not Yet Reviewed
$3,795.95
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.
Not Yet Reviewed
$4,399.95
The S&S Cycle 124 in. big bore/stroker Hot Set-Up kits transform a stock Harley-Davidson® engine into a 124 in. monster. It includes: 4 1/8 in. bore pistons; big bore cylinders finished in wrinkle black powdercoat; a dynamically balanced 4 5/8 in. stroke 3-piece flywheel assembly complete with heavy-duty connecting rods and integral mainshafts; 640 gear drive Easy Start camshafts; chromoly steel adjustable pushrods; premium tappets; and Super Stock 91cc cylinder heads. When installed, the kits yield a 124 in. engine with a compression ratio of 11:1. Although the engine is .960 in. taller than stock, there are no frame clearance problems—and a stock EFI throttle body will fit, because the manifold mounting surfaces of the heads have been specially machined to fit a stock length manifold. If you ride a 2006 HD Dyna model, or a balanced or non-balanced Big Twin from 2007-17, these top-end engine rebuild kits are for you. Note: No fuel or ignition system is included. However, for the best results, a larger EFI throttle body, performance intake, and performance exhaust are recommended. The EFI system must be recalibrated. Although not mandatory, S&S recommends adding an oil cooler to bikes ridden in warmer climates. S&S does not recommend compression ratios higher than 10:1 for Tri Glide or other 3-wheel models (including conversions) due to extra loads caused by the lugging nature of these bikes. Detonation and subsequent engine damage may result.
Not Yet Reviewed
$6,808.95
—
$6,999.95
Modal Header
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
