Cases, Rods & Cranks

Bottom-end parts for serious Big Twin builds. S&S Cycle MK-Series engine cases for Harley-Davidson® builds, motor sprocket shaft kits and Timken sprocket shaft bearings for 1936-up Big Twins, wrist pin bushings for 1941-1999 engines, plus the keys, fittings and thread reducers that go with them. If you’re assembling a stroker or replacing cracked cases, this section has the S&S pieces to do it right.

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S&S Cycle Timken Sprocket Shaft Bearings Fits Harley-Davidson Big Twin Evolution 1984-2017
$99.95
This Timken bearing fits 1984-2017 Evolution Big Twin as an OEM replacement and 2000-2017 Twin Cam Big Twin as a Timken conversion. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Fitting
$15.95
A single S&S Cycle 45-degree elbow fitting at 1/4-18 NPTF x .375 inch, used on the Big Twin crankcase flywheel cavity breather line and other oil and breather line connections.
S&S Cycle MK-Series Engine Case Fits Harley-Davidson
$2,499.95
This engine case fits the following Harley-Davidson Milwaukee-Eight Touring models. Made in the U.S.A. by S&S Cycle for service-replacement use. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle 84 Inch Stock Bore Stroker Kit Fits Harley-Davidson Big Twin 1970-1984
$1,580.95
A genuine S&S Cycle 84 Inch Stock Bore Stroker Kit, supplied as a complete stock-bore stroker conversion Compatible with Harley-Davidson 1970-1984 Big Twin Shovelhead engines, lifting displacement to 84 cubic inches.
S&S Cycle Special Application Crankcase Fits Harley-Davidson Big Twin 1984-1999
$1,995.95
This crankcase fits Harley-Davidson 1984-1999 models with Evolution Big Twin engines. Made in the U.S.A. by S&S Cycle for service-replacement use. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Sprocket Shaft Assembly Fits Harley-Davidson
$163.95
This sprocket shaft assembly is designed to fit use with S&S SE and SL flywheels on the following Harley-Davidson Big Twin platforms. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Cylinder Stud Kit Fits Harley-Davidson Milwaukee-Eight 2017-2023
$99.95
This stud kit fits Harley-Davidson Milwaukee-Eight engines from the 2017-2023 production run. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Motor Sprocket Shaft Kit Fits Harley-Davidson Big Twin 1936-1951
$183.95
This shaft assembly fits Harley-Davidson 1936-1951 Big Twin engines, including Knucklehead and early Panhead models. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Thread Reducer
$11.95
This thread reducer is required for installing S&S carburetor support brackets on 1992 Big Twin motors and can also be used on 1993-1999 Big Twin motors with breather relocated to the crankcase.
S&S Cycle T-Style O-Ring Manifold Fits Harley-Davidson Big Twin 1955-1965
$122.95
This manifold fits Harley-Davidson 1955-1965 Panhead Big Twin engines with stock cylinder length and O-ring cylinder heads. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Right Main Pinion Shaft Bearing Fits Harley-Davidson Big Twin Twin Cam 2000-2017
$125.95
This bearing fits Harley-Davidson 2000-2017 Twin Cam Big Twin engines and is the standard specification for S&S T2 crankcases. Made in the Czech Republic for S&S Cycle for service-replacement use.
S&S Cycle Rod Race And Bushing Set Fits Harley-Davidson Big Twin Twin Cam 1936-1999
$224.95
This rod race and bushing set is designed to fit use with S&S and stock Harley-Davidson Big Twin connecting rods, excluding Twin Cam. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Crankcase Oil Passage Drilling Jig
$70.95
This jig is designed to fit use when installing S&S oil pumps on early-style motor cases that require oil passage drilling. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Lower Connecting Rod Assembly Bearings Fits Harley-Davidson Big Twin 1941-1999
$105.95
These lower rod assembly bearings fit Harley-Davidson 1941-1999 Big Twin engines. Made in the U.S.A. by S&S Cycle for service-replacement use. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Inner Right Main Bearing Race Fits Harley-Davidson Twin Cam 2000-2017
$65.95
This bearing race fits the right side of 2000-2017 Harley-Davidson Twin Cam engines and S&S 3-piece flywheel assemblies. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Crankpin Nut For S&S Flywheels Fits Harley-Davidson Big Twin 1941-1999
$14.95
This crankpin nut fits Harley-Davidson 1941-1999 Big Twin OEM flywheels and 1981-1999 S&S Cycle 5-piece flywheel sets. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Wrist Pin Bushing Fits Harley-Davidson Big Twin 1941-1999
$11.95
This bushing fits Harley-Davidson Big Twin engines from 1941 through 1999, and S&S Cycle V96, V107, and V113 engines. Made in the U.S.A. by S&S Cycle for service-replacement use.
S&S Cycle Parallel Key
$9.95
This outer cam gear key is designed to fit use with S&S Gear Drive Cam sets and is not model-specific. Made in the U.S.A. by S&S Cycle for service-replacement use.