Motorcycle Drivetrain & Transmission Parts
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Drive Chains
Sprockets
Chain & Sprocket Kits
Drive Belts & Pulleys
Primary Chains & Belts
Clutches
Transmissions & Components
Variators
Driveshaft
Axles & Accessories
Wheel Hubs
Chain Guide, Protection & Sliders
Sprocket Guards
Transmission Covers
Chain & Belt Adjusters
Primary Chain & Belt Tensioners
Transmission Sensors & Switches
Clutch Lines
Transmission Gaskets, Seals & Bushings
Drivetrain & Transmission Bearings
Drivetrain & Transmission Mounts
Engine & Transmission Custom Covers
Drive Belt & Drive Shaft Covers
Chain Lubes & Cleaners
Transmission Fluids & Oils
Gear Oils
Greases
Drivetrain & Transmission Tools
Featured Brands
- Kuryakyn®Precision™ Inner Chrome Primary Cover (6413)Precision™ Inner Chrome Primary Cover (6413) by Kuryakyn®. Cover the wrinkle black inner primary with a smooth, contoured design that seamlessly forms to the contours and complements the factory outer cover. Includes hardware for easy...Die-cast aluminum construction with premium chrome or gloss black finishOne-piece design with replacement screws for easy installation$176.99
- Kuryakyn®Precision™ Inner Gloss Black Primary Cover (6451)Precision™ Inner Gloss Black Primary Cover (6451) by Kuryakyn®. Cover the wrinkle black inner primary with a smooth, contoured design that seamlessly forms to the contours and complements the factory outer cover. Includes hardware for...Die-cast aluminum construction with premium chrome or gloss black finishOne-piece design with replacement screws for easy installation$173.99
- Kuryakyn®Precision™ Satin Black Throttle Servo Motor Cover (9343)Precision™ Satin Black Aluminum Throttle Servo Motor Cover (9343) by Kuryakyn®. For use with Screamin' Eagle Heavy Breather Air Cleaner. Minimalist styling that gracefully conceals the exposed throttle servo motor and wiring for...Available for use with Kuryakyn and Crusher Air Cleaners, as well as H-D Screamin' Eagle™ Heavy BreathersMade from quality die-cast aluminum offered in chrome or satin black finish$83.59
- Kuryakyn®Precision™ Satin Black Throttle Servo Motor Cover (9341)Precision™ Satin Black Aluminum Throttle Servo Motor Cover (9341) by Kuryakyn®. For use with Kuryakyn Air Cleaners. Minimalist styling that gracefully conceals the exposed throttle servo motor and wiring for Milwaukee-Eight models....Available for use with Kuryakyn and Crusher Air Cleaners, as well as H-D Screamin' Eagle™ Heavy BreathersMade from quality die-cast aluminum offered in chrome or satin black finish$89.99
- Kuryakyn®Rear Chrome Cylinder Base Cover (8694)Rear Chrome Cylinder Base Cover by Kuryakyn®. One of Kuryakyn most popular dress-up items for Harley-Davidsons! Clean up the black hole behind the rear cylinder. Add Kuryakyn Transmission Shroud and the sparkle will be captivating!.Thoroughly developed for unbeatable quality and enduring valueMade with experience and proven by quality$81.99
- Kuryakyn®Rear Chrome Cylinder Base Cover (8274)Rear Chrome Cylinder Base Cover by Kuryakyn®. One of Kuryakyn most popular dress-up items for Harley-Davidsons! Clean up the black hole behind the rear cylinder. Add Kuryakyn Transmission Shroud and the sparkle will be captivating!.Thoroughly developed for unbeatable quality and enduring valueMade with experience and proven by quality$50.99
- Kuryakyn®Rear Chrome Oil Panel Accent (5644)Rear Chrome Oil Panel Accent by Kuryakyn®. The Rear Oil Panel Accent for Indian is a classic chrome cover that surrounds the oil filler cap and covers the wrinkle black base of the motor with gleaming chrome.Made from quality die-cast aluminumCan be installed by itself, but is styled for a cohesive look with the addition of the Inner Primary Cover (P/N 5643) or Starter End Cover (P/N 5642), both sold separately$89.99
- Kuryakyn®Scorpion Chrome Spark Plug/Head Bolt Covers (8323)Scorpion Chrome Spark Plug/Head Bolt Covers by Kuryakyn®. Add a classy touch to your engine. Held in position with set screws, ensuring rattle-free performance. This top-grade product is expertly made in compliance with stringent...Thoroughly developed for unbeatable quality and enduring valueMade with experience and proven by quality$60.99
- Kuryakyn®Scorpion Chrome Spark Plug/Head Bolt Covers (8315)Scorpion Chrome Spark Plug/Head Bolt Covers (8315) by Kuryakyn®. Add a classy touch to your engine. Held in position with set screws, ensuring rattle-free performance. This top-grade product is expertly made in compliance with stringent...Thoroughly developed for unbeatable quality and enduring valueMade with experience and proven by quality$58.99
- Arlen Ness®10-Gauge 2-Hole Blue Point Cover (700-011)10-Gauge 2-Hole Blue Aluminum Point Cover (700-011) by Arlen Ness®. 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....Machined from 6061-T6 billet aluminumEach cover includes chrome hardware$59.45
- Arlen Ness®10-Gauge 2-Hole Red Point Cover (700-014)10-Gauge 2-Hole Red Aluminum Point Cover (700-014) by Arlen Ness®. 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....Machined from 6061-T6 billet aluminumEach cover includes chrome hardware$59.45
- Arlen Ness®10-Gauge 5-Hole Blue Point Cover (700-027)10-Gauge 5-Hole Blue Aluminum Point Cover (700-027) by Arlen Ness®. 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....Machined from 6061-T6 billet aluminumEach cover includes chrome hardware$59.45
- Arlen Ness®10-Gauge 5-Hole Orange Point Cover (700-029)10-Gauge 5-Hole Orange Aluminum Point Cover (700-029) by Arlen Ness®. 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....Machined from 6061-T6 billet aluminumEach cover includes chrome hardware$59.45
- Arlen Ness®10-Gauge Black Cam Cover (03-985)10-Gauge Black Cam Cover (03-985) by Arlen Ness®. 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...Machined from 6061 T-6 forged aluminumReplaces OEM die-cast cam cover$280.45
- Arlen Ness®10-Gauge Black Derby Cover (700-000)10-Gauge Black Aluminum Derby Cover (700-000) by Arlen Ness®. 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....Machined from 6061-T6 billet aluminumChrome hardware included and gasket$135.95
- Arlen Ness®10-Gauge Black Pushrod Covers (03-634)10-Gauge Black Pushrod Covers (03-634) by Arlen Ness®, 4 Pieces. 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....Machined from 6061 T-6 billet aluminumLower tubes allow easy access for adjustable pushrods$195.45
- Arlen Ness®10-Gauge Black Rocker Box Top Covers (18-266)10-Gauge Black Rocker Box Top Covers (18-266) by Arlen Ness®, 1 Pair. 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....Carved from 6061 T-6 forged billet aluminumDrastically changes the look of your engine$594.95
- Arlen Ness®10-Gauge Black Transmission Top Cover (03-864)10-Gauge Black Aluminum Transmission Top Cover (03-864) by Arlen Ness®. 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....Machined from billet aluminumReplaces OEM cast cover$178.45
- Arlen Ness®10-Gauge Blue Derby Cover (700-019)10-Gauge Blue Aluminum Derby Cover (700-019) by Arlen Ness®. 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....Machined from 6061-T6 billet aluminumChrome hardware included and gasket$144.45
- Arlen Ness®10-Gauge Chrome Derby Cover (700-001)10-Gauge Chrome Aluminum Derby Cover (700-001) by Arlen Ness®. 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....Machined from 6061-T6 billet aluminumChrome hardware included and gasket$135.95
- Arlen Ness®10-Gauge Contrast Cut Rocker Box Top Covers (18-253)10-Gauge Contrast Cut Rocker Box Top Covers (18-253) by Arlen Ness®, 1 Pair. 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...Carved from 6061 T-6 forged billet aluminumDrastically changes the look of your engine$467.45
- Arlen Ness®10-Gauge Left Side Black Stator Cover (I-1170)10-Gauge Left Side Black Stator Cover by Arlen Ness®. 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...CNC machined from billet aluminumReplaces factory stator cover on the left hand side of engine$116.95
- Arlen Ness®10-Gauge Lifter Block Covers (12-582)10-Gauge Lifter Block Covers by Arlen Ness®. Chrome. 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...Thoroughly developed for unbeatable quality and enduring valueMade with experience and proven by quality$224.95
- Arlen Ness®10-Gauge Red Derby Cover (700-022)10-Gauge Red Aluminum Derby Cover (700-022) by Arlen Ness®. 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....Machined from 6061-T6 billet aluminumChrome hardware included and gasket$144.45
- Arlen Ness®10-Gauge Titanium Cam Cover (03-986)10-Gauge Titanium Cam Cover (03-986) by Arlen Ness®. 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...Machined from 6061 T-6 forged aluminumReplaces OEM die-cast cam cover$280.45
- Arlen Ness®10-Gauge Titanium Lifter Block Covers (12-585)10-Gauge Titanium Aluminum Lifter Block Covers (12-585) by Arlen Ness®, 1 Pair. 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...Machined from 6061-T6 billet aluminumReplaces cast OEM lifter block cover$212.45
- Arlen Ness®10-Gauge Titanium Pushrod Covers (03-635)10-Gauge Titanium Pushrod Covers (03-635) by Arlen Ness®, 4 Pieces. 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....Machined from 6061 T-6 billet aluminumLower tubes allow easy access for adjustable pushrods$195.45
- Arlen Ness®10-Gauge Titanium Rocker Box Top Covers (18-267)10-Gauge Titanium Rocker Box Top Covers (18-267) by Arlen Ness®, 1 Pair. 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...Carved from 6061 T-6 forged billet aluminumDrastically changes the look of your engine$594.95
- Arlen Ness®10-Gauge Titanium Transmission Top Cover (03-865)10-Gauge Titanium Aluminum Transmission Top Cover (03-865) by Arlen Ness®. 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...Machined from billet aluminumReplaces OEM cast cover$178.45
- Arlen Ness®10-Gauge™ Primary Cover (I-1173)10-Gauge™ Primary Cover by Arlen Ness®. Chrome. 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...10-Gauge® primary cover for Scout® enginesCNC machined from forged billet aluminum$144.45
Motorcycle transmission and drivetrain systems have their own peculiarities. Most bikes are equipped with a manual sequential transmission. Rather compact and lightweight, it perfectly transfers power and typically has five or six gears to shift using a foot lever. Meanwhile, such renowned companies as Honda and Aprilia try to change the game by offering models with a dual-clutch gearbox or a CVT, and they achieved considerable success. However, all the abovementioned systems are quite complex mechanisms that require regular maintenance or even repairs from time to time.
Most manual assemblies are robust enough, but over time, moving parts may start giving you trouble due to friction, corrosion, or mechanical damage. Problems with a lever, shift forks, and other components of the shifting mechanism can be accompanied with a worn-out clutch, gears, and bearings, giving the bike's owner a strong reason to make a total rebuild. In CVTs, belt replacement is arguably the most common procedure; besides the belt itself, a clutch holding/removing tool is needed, and such a job requires certain experience and skills.
When it comes to final drive, engine output can be transferred to the rear wheel in three ways – via the chain, belt, or shaft. The first way is the most widespread; it's efficient and reliable enough, although the chain tends to stretch, and sprockets also gradually wear out. Such a setup needs to be periodically tightened, cleaned, and lubed to last long; fortunately, there are plenty of corresponding tools and chemicals allowing you to easily and effectively remove old dirty grease and protect metal parts from moisture and rust. As for the belt, corrosion is not an issue at all. Considered to be a decent alternative to the chain, the belt needs almost no maintenance and works quieter and smoother.
The very early bikes used leather drive belts that didn't last long. Modern belts are way stronger and use special hydrogenated nitrile rubber (HNBR) mixtures resistant to oil and heat, polyamide fabric for reinforcement, wear-resistant polyethylene coating, and other materials enabling these parts to last almost as long as the bike itself, though you may need to check and adjust the belt's deflection. Meanwhile, chains and sprockets are considered stronger than belts & pulleys and better withstand hard acceleration. Most high-performance and superpowerful motorcycles still use them, along with some custom two-wheelers where chains allow for installing different sprockets to match the output of a modified motor.
As for shaft drive, this mechanism is extremely durable and virtually maintenance-free, under the condition that you regularly change gear oil. While refilling the case, check for the presence of metal shavings in old oil, which can be the first sign of run-down gears. Also, there must be no leaks caused by faulty seals. In terms of performance, approximately 20-25 percent of torque is lost in this kind of drive, and the system is heavier than other setups, so there is no sense to install it in small-displacement and supersport motorcycles in which extra weight is undesirable. We carry quality aftermarket parts, chemicals, and tools for any of the abovementioned systems. While many components are factory-style replacements, others have a custom finish and are used for various upgrades.