Crankcase - 4.125" Bore w/Stock Bolt Pattern - Wrinkle Black - Dyna The S&S CYCLE 4.125-inch bore crankcase (Part 310-0856) is designed as a robust foundation for custom engine builds or replacement applications for T111, T124, and T143 models...

Engine Case - +4.000" Bore - Special Application - Evolution Big Twin Designed specifically for high-performance engines with large cylinder bores, the S&S Cycle Engine Case part number 31-0047 offers exceptional durability and precision engineering...

Engine Case - Super Stock® Generator Style - Stock Bore - Big Twin '65-'69 The S&S CYCLE Super Stock® engine case is designed for authentic vintage restoration and performance upgrades on Big Twin models from 1965 to 1969. Crafted with precision,...

Engine Case - Super Stock® Generator - Big Twin '48-'64 The S&S CYCLE Part 31-0008 engine case is designed for vintage Big Twin models from 1948 to 1964, delivering reliable performance and high-quality construction. Crafted with precision, this...

Engine Case - Super Stock® - 3.500" - Evolution Big Twin The S&S CYCLE Super Stock engine case, part number 31-0052, is a precision-machined component designed for Evolution Big Twin motorcycles with a 3.5-inch bore. Constructed to accommodate...

Nut - Crankpin - Black The S&S CYCLE Black Crankpin Nut (Part Number: 34-2104) is specifically designed for use with L81 through 1999 S&S® flywheels, ensuring a reliable and secure fit. Crafted in the USA, this high-quality nut provides...

Stroker Flywheel Kit - 106" - Twin Cam Upgrade your Twin Cam engine with the S&S Cycle Stroker Flywheel Kit designed for a 106-inch displacement. Built with precision, this kit features three-piece assembled flywheels with shafts that simplify...

Stroker Flywheel Kit - 106" - Twin Cam The S&S Cycle 320-0460 Stroker Flywheel Kit is designed to enhance the performance of your Twin Cam motorcycle engine by increasing displacement to 106 inches. This kit features a three-piece assembled flywheel...

Stroker Flywheel Kit - 106" - Twin Cam Upgrade your Twin Cam engine with the S&S CYCLE 320-0454 Stroker Flywheel Kit, designed to deliver enhanced performance and reliability. This kit features a three-piece assembled flywheel with shafts, ensuring...

Flywheel Assembly - 4.00" - with Sprocket Bearing Race - 88"/95"/100" Twin Cam "B" '03-'06 The S&S CYCLE 320-0396 flywheel assembly is a high-strength component designed for Harley-Davidson Twin Cam B engines from 2003 to 2006. Crafted from premium...

Flywheel Assembly - 4-3/8" - with Sprocket Bearing Race - 96"/103"/110" Twin Cam "A" '07-'16

Flywheel -

Flywheel Assembly - 4-3/8" - w/o Sprocket Bearing Race - Twin Cam "B" '99-'06 The S&S CYCLE 320-0355 flywheel assembly is engineered for high performance and durability in Twin Cam engines from 1999 to 2006. Crafted from 4140 steel, these 3-piece...

Flywheel Assembly - 4.250" Stroke - EFI Models - Evolution Big Twin '95-'98 The S&S CYCLE Flywheel Assembly (Part 32-2145) is engineered for high-performance Harley-Davidson Evolution Big Twin models from 1995 to 1998. Crafted from high-strength...

Flywheel Assembly - 4-5/8" - w/o Sprocket Bearing Race - Twin Cam w/124" S&S Motor '07-'17 The S&S CYCLE Flywheel Assembly, part number 320-0464, is specifically designed for Twin Cam engines from 2007 to 2017 with 124-inch displacement. Crafted...

Flywheel Assembly - 4-3/8" - with Sprocket Bearing Race - Twin Cam "B" '99-'06 (except '06 Dyna) The S&S Cycle Flywheel Assembly (Part 320-0354) is designed for 96, 103, and 106-inch big bore engines, as well as 110 and 117-inch engines equipped with...

Flywheel Assembly - 4-3/8" - with Sprocket Bearing Race - Twin Cam "A" '99-'06 (except '06 Dyna) The S&S CYCLE Part Number 320-0360 flywheel assembly is designed for 96", 103", and 106" big bore engines with 110" or 117" inch S&S or stock pistons...

Flywheel Assembly - 4-3/8" Stroke - Tapered Wrist Pin - 107" M8

Flywheel Assembly - 4-5/8" Stroke - Full Wrist Pin - 131" M8

Crankpin Assembly - Standard - Big Twin '41-E'81 The S&S CYCLE Crankpin Assembly (Part #34-2003) is designed for use with stock and S&S flywheels in Big Twin motorcycles from 1941 to 1981. This high-quality component is essential for maintaining...

Crankpin Assembly -Standard - XL '57-'E'81 The S&S CYCLE Crankpin Assembly (Part 34-2503) is designed for use in stock and S&S flywheels, ensuring reliable performance in classic Harley-Davidson models from 1957 through 1981. Crafted with...

Crankpin Assmebly - Standard - XL L'81-'85 The S&S CYCLE Crankpin Assembly (Part Number 34-2602) is designed specifically for use in stock and S&S flywheels in Harley-Davidson XL models from 1981 to 1985. This high-quality component is crafted in...

Connecting Rod - Evolution Big Twin '84-'99 Upgrade your Harley-Davidson Evolution Big Twin engine with the S&S Cycle Part 34-7013 connecting rod set, engineered for durability and performance. This heavy-duty set includes both front and rear rods,...

Engine Case - Super Stock® Big Bore - 3.625" - Big Twin The S&S CYCLE Super Stock® Big Bore Engine Case is designed for high-performance Harley-Davidson Big Twin applications, offering a 3.625-inch bore size suitable for strokes up to 5 inches and...

Connecting Rod - Big Twin '41-E'81 The S&S CYCLE Connecting Rod Set (Part No. 34-7004) is a high-quality, heavy-duty component designed for optimal performance in Big Twin applications from 1941 to 1981. Crafted with precision, these rods are...

Engine Case - Super Stock® Big Bore - 3.625" - Evolution Big Twin The S&S CYCLE Super Stock Big Bore Engine Case is designed for high-performance Harley-Davidson Evolution Big Twin engines. Featuring a 3.625-inch bore, this case provides increased...

132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/o Highlighted Fins - M8 Upgrade your motorcycle's performance with the S&S CYCLE 132" High Compression kit, designed specifically for 114" and 117" motors equipped with 4-1/2" stroke...

Pinion Shaft Gear Kit - Middle Size - '77-'99 The S&S CYCLE Pinion Shaft Gear Kit (Part 33-4148) is designed for easy installation on Harley-Davidson big twin engines from 1977 to 1999, including S&S flywheels. This comprehensive kit features a...

Flywheel Assembly - 4-3/8" - w/o Sprocket Bearing Race - 96"/103"/110" Twin Cam "B" '07-'16 The S&S CYCLE Flywheel Assembly, part number 320-0359, is a robust 3-piece flywheel designed for Twin Cam 'B' models from 2007 to 2016. Crafted from...

Flywheel Assembly - 4.00" - w/o Sprocket Bearing Race - 88"/95"/100" Twin Cam "A" '99-'02 The S&S Cycle 320-0403 flywheel assembly is engineered for durability and performance, designed specifically for 1988-2002 Twin Cam engines. Constructed from...

Flywheel Assembly - 4.00" - with Sprocket Bearing Race - 88"/95"/100" Twin Cam "A" '03-'06

Flywheel Assembly - 4-3/8" - with Sprocket Bearing Race - 96"/103"/110" Twin Cam "B" '07-'16

Flywheel Assembly - 4.625" Stroke - Carbureted Models - Evolution Big Twin '84-'98 This S&S CYCLE flywheel assembly is designed for carbureted Evolution Big Twin models from 1984 to 1998, delivering reliable performance for stock and high-performance...

Flywheel - 4-1/4" - Big Twin The S&S Cycle 32-2235 flywheel is a precision-engineered component designed for use in 70-84 Big Twin engines with alternator style crankcases. CNC machined from heat-treated, closed die steel forgings, this flywheel...

Flywheel Assembly - 4-5/8" - w/o Sprocket Bearing Race - Replacement for SE 120R 124" Motor The S&S CYCLE Flywheel Assembly part number 320-0523 is engineered for high performance and durability in large displacement motorcycle engines. Crafted from...

Flywheel Assembly - 4-5/8" - 124" Big Twin '84-'99 Upgrade your Harley-Davidson Big Twin engine with the S&S Cycle Flywheel Assembly designed specifically for 124" engines from 1984 to 1999. Crafted from heat-treated, closed die steel forgings, this...

Crankpin Assembly - +0.002" Oversize - Big Twin L'81-'99 (except '99 Twin Cam) The S&S CYCLE Crankpin Assembly, part number 34-2105, is designed for use in stock and S&S flywheels in Big Twin models manufactured from 1981 to 1999, excluding the...

Crankpin Assembly - +0.001" Oversize - Big Twin 41-E'81 The S&S CYCLE Crankpin Assembly, part number 34-2007, is designed for use in stock and S&S flywheels for Big Twin models from 1941 to 1981. This high-quality component is crafted in the USA...

Crankpin Assembly - +0.001" Oversize - Big Twin L'81-'99 (except '99 Twin Cam) The S&S CYCLE Crankpin Assembly part number 34-2103 is designed for use in stock and S&S flywheels on Big Twin motorcycles manufactured between 1981 and 1999,...

Pinion Shaft - Big Twin '36-'53 The S&S CYCLE Pinion Shaft (Part No. 33-2021) is a high-quality replacement component designed for classic Big Twin models manufactured between 1936 and 1953. Crafted in the USA, this pinion shaft ensures durability...

Flywheel Assembly - 4-250" Stroke - Carbureted Models - Evolution Big Twin '84-'98 The S&S CYCLE Flywheel Assembly (Part 32-2239) is engineered for high-performance Harley-Davidson Evolution Big Twin engines from 1984 to 1998. Crafted from...

Engine Case - 3.750" Bore w/Stock Stud Pattern - Wrinkle Black - Twin Cam Upgrade your Harley-Davidson with the S&S CYCLE Twin Cam 310-0367A engine case, designed for stock H-D chassis with carbureted or EFI systems. Crafted for strength and...

Sprocket Spacer - Big Twin The S&S Cycle Sprocket Spacer (Part Number: 31-4011) is designed specifically for use with S&S Super Stock® and special application crankcases in Big Twin motorcycles. This high-quality spacer ensures proper alignment...

Engine Case - 4.125" Bore w/Stock Stud Pattern - Wrinkle Black - Twin Cam The S&S CYCLE Twin Cam 310-0369 engine case is designed for Harley-Davidson stock chassis, compatible with both carbureted and EFI systems. Crafted for durability, this...