Motorcycle Crankshafts & Components
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- ProX®Complete Crankshaft (10.6113)Complete Crankshaft by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Expertly crafted from premium materialsDesigned to match rigorous quality standards$260.97
- ProX®Complete Crankshaft (10.3405)Complete Crankshaft by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Expertly crafted from premium materialsDesigned to match rigorous quality standards$291.99
- ProX®Crankshaft Bearing and Seal Kit (23.CBS64003)Crankshaft Bearing and Seal Kit by ProX®. ProX crankshaft bearings and seals are manufactured at leading OEM factories, mainly in Japan. All bearings and seals are made to exact OEM specifications, to ensure maximum quality and...Carefully developed for the highest level of qualityReady to serve reliably for years to come$132.17
- ProX®Crankshaft Bearing and Seal Kit (23.CBS23088)Crankshaft Bearing and Seal Kit by ProX®. ProX crankshaft bearings and seals are manufactured at leading OEM factories, mainly in Japan. All bearings and seals are made to exact OEM specifications, to ensure maximum quality and...Carefully developed for the highest level of qualityReady to serve reliably for years to come$59.90
- ProX®Crankshaft Seal Kit (42.1402)Crankshaft Seal Kit by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Carefully developed for the highest level of qualityUnsurpassed in functionality and reliability$18.95
- ProX®Crankshaft Seal Kit (42.2218)Crankshaft Seal Kit by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Carefully developed for the highest level of qualityUnsurpassed in functionality and reliability$18.99
- ProX®Crankshaft Seal Kit (42.2225)Crankshaft Seal Kit by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Carefully developed for the highest level of qualityUnsurpassed in functionality and reliability$14.93
- S&S Cycle®106" Stock Bore Stroker Kit (320-0449)106" Stock Bore Stroker Kit (320-0449) by S&S Cycle®. Vast improvement over stock flywheels, which shift out of true under heavy loads. Heat-treated 4140 material is 114% stronger than stock, eliminates thrust washer. Larger 1.671"...Made in USAPrecise engineering ensures the latest in quality$1,711.95
- S&S Cycle®106" Stock Bore Stroker Kit (320-0459)106" Stock Bore Stroker Kit (320-0459) by S&S Cycle®. Vast improvement over stock flywheels, which shift out of true under heavy loads. Heat-treated 4140 material is 114% stronger than stock, eliminates thrust washer. Larger 1.671"...Made in USAPrecise engineering ensures the latest in quality$1,685.95
- S&S Cycle®3-Piece Flywheel Assembly (320-0403)3-Piece Flywheel Assembly (320-0403) by S&S Cycle®. Vast improvement over stock flywheels, which shift out of true under heavy loads. Heat-treated 4140 material is 114% stronger than stock, eliminates thrust washer. Larger 1.671"...Made in USAPrecise engineering ensures the latest in quality$1,658.95
- S&S Cycle®B Motors Flywheel Assembly with Sprocket Shaft Bearing Race (320-0356)B Motors Flywheel Assembly with Sprocket Shaft Bearing Race (320-0356) by S&S Cycle®. Stock pistons in 2007 and later engines require rods with tapered wristpin ends. All S&S® Flywheels for 2007 and later engines have 7.659" length...Made in USAPrecise engineering ensures the latest in quality$1,738.95
- S&S Cycle®Crank Pin Assembly (34-2102)Crank Pin Assembly (34-2102) by S&S Cycle®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Made in USAPrecise engineering ensures the latest in quality$156.95
- S&S Cycle®Flywheel Assembly (32-2230)Flywheel Assembly (32-2230) by S&S Cycle®. Stock bore stroker kits have always been an economical way to increase the displacement of your engine. This S&S 89" stock bore stroker kit upgrades carbureted 80" HD 80 Evolution big twin...Made in USAPrecise engineering ensures the latest in quality$1,497.95
- S&S Cycle®Flywheel Assembly (32-2235)Flywheel Assembly (32-2235) by S&S Cycle®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Use them to overhaul an S&S® engine or to build a custom engine using similar crankcases and pistonsMade in USA$1,497.95
- S&S Cycle®Flywheel Assembly (32-2239)Flywheel Assembly (32-2239) by S&S Cycle®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Made in USAPrecise engineering ensures the latest in quality$1,497.95
- S&S Cycle®Flywheel Assembly with Sprocket Shaft Bearing Race (320-0402)Flywheel Assembly with Sprocket Shaft Bearing Race (320-0402) by S&S Cycle®. All S&S® Flywheels for 1999-'06 engines have 7.667" length connecting rods. Flywheel assemblies supplied with sprocket shaft bearing race installed are...Made in USAPrecise engineering ensures the latest in quality$1,685.95
- S&S Cycle®Flywheel Assembly with Sprocket Shaft Bearing Race (320-0396)Flywheel Assembly with Sprocket Shaft Bearing Race (320-0396) by S&S Cycle®. All S&S® Flywheels for 1999-'06 engines have 7.667" length connecting rods. Flywheel assemblies supplied with sprocket shaft bearing race installed are...Made in USAPrecise engineering ensures the latest in quality$1,711.95
- S&S Cycle®Flywheel Assembly without Sprocket Shaft Bearing Race (320-0464)Flywheel Assembly without Sprocket Shaft Bearing Race (320-0464) by S&S Cycle®. Sprocket shaft does not have a stock style bearing race pressed on. This flywheel assembly is for crankcases with Timken® sprocket shaft bearing. Flywheel...Made in USAPrecise engineering ensures the latest in quality$1,685.95
- S&S Cycle®Flywheel Assembly without Sprocket Shaft Bearing Race (320-0469)Flywheel Assembly without Sprocket Shaft Bearing Race (320-0469) by S&S Cycle®. Sprocket shaft does not have a stock style bearing race pressed on. This flywheel assembly is for crankcases with Timken® sprocket shaft bearing. Pinion...Made in USAPrecise engineering ensures the latest in quality$1,685.95
- S&S Cycle®Flywheel Assembly without Sprocket Shaft Bearing Race (320-0475)Flywheel Assembly without Sprocket Shaft Bearing Race (320-0475) by S&S Cycle®. Sprocket shaft does not have a stock style bearing race pressed on. This flywheel assembly is for crankcases with Timken® sprocket shaft bearing. Flywheel...Made in USAPrecise engineering ensures the latest in quality$1,658.95
- S&S Cycle®Idler Gear Assembly (33-4216)Idler Gear Assembly by S&S Cycle®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Precise engineering ensures the latest in qualityExpertly manufactured from highly reliable materials$229.95
- S&S Cycle®Oversize Pinion Gear (33-4142)Oversize Pinion Gear (33-4142) by S&S Cycle®. High-quality gears precision-machined, heat-treated and finish ground to different sizes for optimum gear lash. This top-grade product is expertly made in compliance with stringent industry...Each size is color-coded to match a stock equivalent gearGears from the middle of the range are recommended for building from scratch$125.96
- S&S Cycle®Pinion Gear (33-4166)Pinion Gear (33-4166) by S&S Cycle®. High-quality gears precision-machined, heat-treated and finish ground to different sizes for optimum gear lash. This top-grade product is expertly made in compliance with stringent industry standards...Each size is color-coded to match a stock equivalent gearGears from the middle of the range are recommended for building from scratch$225.95
- S&S Cycle®Pinion Gear (33-4164)Pinion Gear (33-4164) by S&S Cycle®. High-quality gears precision-machined, heat-treated and finish ground to different sizes for optimum gear lash. This top-grade product is expertly made in compliance with stringent industry standards...Each size is color-coded to match a stock equivalent gearGears from the middle of the range are recommended for building from scratch$241.95
- S&S Cycle®Pinion Gear for Gear Drive (33-4160Z)Pinion Gear for Gear Drive (33-4160Z) by S&S Cycle®. High-quality gears precision-machined, heat-treated and finish ground to different sizes for optimum gear lash. This top-grade product is expertly made in compliance with stringent...Precise engineering ensures the latest in qualityExpertly manufactured from highly reliable materials$126.95
- S&S Cycle®Pinion Gear for Gear Drive (33-4160X)Pinion Gear for Gear Drive (33-4160X) by S&S Cycle®. High-quality gears precision-machined, heat-treated and finish ground to different sizes for optimum gear lash. This top-grade product is expertly made in compliance with stringent...Precise engineering ensures the latest in qualityExpertly manufactured from highly reliable materials$126.95
- S&S Cycle®Pinion Gear for Gear Drive (33-4160XX)Pinion Gear for Gear Drive (33-4160XX) by S&S Cycle®. High-quality gears precision-machined, heat-treated and finish ground to different sizes for optimum gear lash. This top-grade product is expertly made in compliance with stringent...Precise engineering ensures the latest in qualityExpertly manufactured from highly reliable materials$126.95
- S&S Cycle®Pinion Shaft Assembly (33-2024)Pinion Shaft Assembly by S&S Cycle®. Fits S&S L, AL, SE or stock flywheels. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...Made in USAPrecise engineering ensures the latest in quality$176.95
- S&S Cycle®Sprocket Shaft Assembly (33-2004)Sprocket Shaft Assembly by S&S Cycle®. Fits S&S® or stock flywheels. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Includes motor sprocket nutMade in USA$149.95
- S&S Cycle®Standard Pinion Gear (33-4144)Standard Pinion Gear (33-4144) by S&S Cycle®. High-quality gears precision-machined, heat-treated and finish ground to different sizes for optimum gear lash. This top-grade product is expertly made in compliance with stringent industry...Each size is color-coded to match a stock equivalent gearGears from the middle of the range are recommended for building from scratch$106.95
The crankshaft is the mechanical part of your motorcycle engine that is responsible for its proper operation. The purpose of the crankshaft is to convert the linear movements of pistons into rotational motion, which is then transferred to the wheels. The pistons are attached to the crankshaft with the help of offset shafts. When the pistons move up and down, they push the offset shaft, which in turn leads to crankshaft rotation. One end of the crankshaft is attached to the camshaft by means of a belt or chain, while the other end is connected to the flywheel, which reduces the pulsation characteristic of the four-stroke cycle and thus regulates the power coming out of the engine.
The crankshaft spins at a very high speed. To rotate freely yet to be properly secured in the engine block and reduce vibration, it comes with a bearing on each end. Bearings allow the crankshaft to rotate at high revs while staying firmly attached. Crankshaft bearings also help reduce friction between the rotating crankshaft and stationary engine block and thus sustain a lot of damage. Plus, they are mainly made from copper and lead compounds which are more fragile than the materials used to manufacture the engine block and the crankshaft, so the bearings may wear out prematurely and need an urgent replacement.
You can upgrade your bike’s exhaust, fuel or air intake system but to squeeze maximum performance out of your iron horse, you should retrofit its engine. One of the most effective ways to do that is to install a high-performance crankshaft. Such crankshafts are made from lighter yet no less durable materials and demand less power to spin. Designed with precise engineering using advanced technologies and sophisticated equipment, they deliver superior operation and feature impeccable quality. Such crankshafts along with all necessary parts and components for their proper installation, including seal kits, bearings, crankshaft pins, and many more, are available on our website.
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