Motorcycle Crankshafts & Components
![Motorcycle Crankshaft & Components](https://ic.motorcycleid.com/motorcycle/pages/crankshafts-components/motorcycle-crankshafts-components_collage_0.jpg)
- Steahly Off Road®Flywheel Weight (719)Flywheel Weight (719) by Steahly Off Road®. Make your 125 power smoother and easier to control with a Steahly Flywheel Weight. Soften the hit and make it more chuggable. Most woods riders will benefit as well as all beginner and timid...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$140.02
- Steahly Off Road®Flywheel Weight (715L)Flywheel Weight (715L) by Steahly Off Road®. The RM has less flywheel than the other 250 MXers, which can make it stall easily and difficult to control when traction is not perfect. Gain tractability and stall resistance by adding a...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$147.92
- Steahly Off Road®Flywheel Weight (624)Flywheel Weight by Steahly Off Road®. The Steahly Flywheel will enhance the strong power of the KX 250 engine, making it more tractable and easier to ride. Several different sizes are available for all types of riding, whether it's MX,...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$147.92
- Steahly Off Road®Flywheel Weight (619L)Flywheel Weight (619L) by Steahly Off Road®. The Steahly Flywheel will enhance the strong power of the KX 250 engine, making it more tractable and easier to ride. Several different sizes are available for all types of riding, whether...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$157.76
- Steahly Off Road®Flywheel Weight (619)Flywheel Weight (619) by Steahly Off Road®. The Steahly Flywheel will enhance the strong power of the KX 250 engine, making it more tractable and easier to ride. Several different sizes are available for all types of riding, whether...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$157.76
- Steahly Off Road®Flywheel Weight (615)Flywheel Weight by Steahly Off Road®. Adding flywheel weight to the KX 500 will make the power smoother, more tractable, and more controllable. It will get the power to the ground better, making the bike easier to ride and less tiring....Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$157.76
- Steahly Off Road®Flywheel Weight (606L)Flywheel Weight (606L) by Steahly Off Road®. This easy mod will make it much easier to control the hard hitting power of the little KX. Most woods and trail riders will benefit. All beginner and timid riders will do better with the...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$147.92
- Steahly Off Road®Flywheel Weight (520)Flywheel Weight by Steahly Off Road®. This is a simple mod that will make it much easier to control the hard hitting power of the little CRF. Most woods and trail riders will benefit. All beginner and timid riders will do better because...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$157.76
- Steahly Off Road®Flywheel Weight (516)Flywheel Weight by Steahly Off Road®. Make your 125 power smoother and easier to control with a Steahly Flywheel Weight. Soften the hit and make it more chuggable. Most woods riders will benefit as well as all beginner and timid riders....Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$147.92
- Steahly Off Road®Flywheel Weight (514L)Flywheel Weight (514L) by Steahly Off Road®. Flywheel Weight For reduced stalling and a smoother, more controlled and tractable power delivery use a Steahly flywheel weight. Most riders will ride better and longer with Steahly Off Road...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$157.76
- Steahly Off Road®Flywheel Weight (514)Flywheel Weight (514) by Steahly Off Road®. Flywheel Weight For reduced stalling and a smoother, more controlled and tractable power delivery use a Steahly flywheel weight. Most riders will ride better and longer with Steahly Off Road...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$157.76
- Steahly Off Road®Flywheel Weight (509)Flywheel Weight by Steahly Off Road®. This simple mod will make it much easier to control the light switch like power delivery of the little CR. Most woods and trail riders will benefit. Beginner and timid riders will do better because...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$147.92
- Steahly Off Road®Flywheel Weight (506L)Flywheel Weight (506L) by Steahly Off Road®. For reduced stalling and a smoother, more controlled and tractable power delivery use a Steahly flywheel weight. Most riders will ride better and longer with Steahly Off Road flywheels, just...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$147.92
- Steahly Off Road®Flywheel Weight (505)Flywheel Weight (505) by Steahly Off Road®. A Steahly Flywheel Weight will transform this beast into a traction monster. The bike will be much easier to ride and will get the power to the ground. All woods riders will love it and many...Precision-machined from stainless steelBolt-on installation at end of crank no drilling or tapping required$147.92
- Wiseco®Complete Bottom End Rebuild Kit (WPC175)Complete Bottom End Rebuild Kit by Wiseco®. Multi-cylinder applications come complete with main bearings (unless specified otherwise). Pre-assembled and precision trued to OEM specifications. Ready for installation. Every Wiseco...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$573.76
- Wiseco®Complete Bottom End Rebuild Kit (WPC153)Complete Bottom End Rebuild Kit by Wiseco®. Multi-cylinder applications come complete with main bearings (unless specified otherwise). Pre-assembled and precision trued to OEM specifications. Ready for installation. Every Wiseco...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$479.83
- Wiseco®Crankshaft Bearing Kit 28x72x18mm (BK5024)Crankshaft Bearing Kit 28x72x18mm by Wiseco®. 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...Expertly crafted from premium materialsDesigned to match rigorous quality standards$116.46
- Eastern Performance®Engine Woodruff Keys (A-23985-12)Engine Woodruff Keys (A-23985-12) by Eastern Performance®. Eastern Performance® has a huge selection of the best motorcycle parts & accessories for your Harley Davidson Touring, Softail, Dyna, Sportster, and V-Rod models. With over 20...Crafted with precision using leading innovationsDesigned specifically for Harley-Davidson motorcycles$26.58
- Eastern Performance®Engine Woodruff Keys (A-23985-18)Engine Woodruff Keys (A-23985-18) by Eastern Performance®. Eastern Performance® has a huge selection of the best motorcycle parts & accessories for your Harley Davidson Touring, Softail, Dyna, Sportster, and V-Rod models. With over 20...Crafted with precision using leading innovationsDesigned specifically for Harley-Davidson motorcycles$11.38
- Eastern Performance®Engine Woodruff Keys (A-23985-54)Engine Woodruff Keys (A-23985-54) by Eastern Performance®. Eastern Performance® has a huge selection of the best motorcycle parts & accessories for your Harley Davidson Touring, Softail, Dyna, Sportster, and V-Rod models. With over 20...Crafted with precision using leading innovationsDesigned specifically for Harley-Davidson motorcycles$11.38
- Hot Rods®Counter Balancer Bearing Kit (HR00138)Counter Balancer Bearing Kit by Hot Rods®. Hot Rods counterbalance kits repair leaking countershaft seals. A must-have, these replacement kits include trusted Hot Rods bearings for the counterbalancer shaft for most modern 4-stroke...Made with dedication to forward-thinking design and high qualityUnique, dependable, and functional$19.76
- Hot Rods®Crankshaft Assemblies (HR00047)Crankshaft Assemblies by Hot Rods®. Are you looking to replace a broken, worn-out crankshaft assembly? Hot Rods complete crankshaft assemblies are sold with Hot Rods connecting rods and wrist pin bearings. These crankshafts are factory...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$336.56
- Hot Rods®Crankshaft Main Bearing and Seal Kit (K095)Crankshaft Main Bearing and Seal Kit by Hot Rods®. 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...Stringently tested with the highest quality standardsBuilt for long-lasting dependability and unmatched quality$63.86
- Hot Rods®Crankshaft Main Bearing and Seal Kit (HR00059)Crankshaft Main Bearing and Seal Kit by Hot Rods®. 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...Stringently tested with the highest quality standardsBuilt for long-lasting dependability and unmatched quality$45.86
- ProX®Crankshaft Bearing (23.6307C3)Crankshaft Bearing by ProX®. ProX offers a wide range of crankshaft bearing of well known brands like Koyo, NTN, etc in C3 and C4 graduations. The high quality bearings will fit perfectly to OEM and aftermarket crankshafts. ProX...Made with dedication to forward-thinking design and high qualityUnique, dependable, and functional$31.68
- ProX®Crankshaft Bearing and Seal Kit (23.CBS14002)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$97.27
- ProX®Crankshaft Seal Kit (42.2008)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$28.36
- ProX®Crankshaft Seal Kit (42.1301)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$11.39
- S&S Cycle®M-Eight M-Eight Flywheel Assemblies with Tapered Rods & w/o Balancer Gear (320-0616)M-Eight M-Eight Flywheel Assemblies with Tapered Rods & w/o Balancer Gear (320-0616) 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...Made in USAPrecise engineering ensures the latest in quality$1,599.95
- S&S Cycle®M8 Flywheel Full 4-1/2" (320-0603)M8 Flywheel Full 4-1/2" (320-0603) 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$1,818.95
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.
Featured Brands
Related Categories
Complete Engines
Timing Gears & Chains
Valves & Valve Train Parts
Pistons, Rings & Connecting Rods
Camshafts
Engine Blocks & Parts
Cylinder Heads
Push Rods & Lifter Blocks
Cylinders
Turbochargers & Superchargers
Cam Chain & Belt Tensioners
Oil Filters
Oil Pumps
Timing Pulleys & Belts
Oil Cooling Systems
Oil Pans, Dipsticks & Drain Plugs
Oil Lines
Auxiliary Belts
Oil Tanks
Engine Case Covers
Engine Rebuild Kits
Engine Vents
Engine Sensors & Switches
Engine Gaskets & Seals
Engine Mounts & Hardware
Engine Bearings
Engine Oils & Additives
Chemicals
Engine Tools