Motocross/Dirt Bike Drivetrain & Transmission Parts
- Drive Chains
- Sprockets
- Chain & Sprocket Kits
- Clutches
- Transmissions & Components
- Variators
- Axles & Accessories
- Wheel Hubs
- Chain Guide, Protection & Sliders
- Sprocket Guards
- Transmission Covers
- Chain & Belt Adjusters
- Clutch Lines
- Transmission Gaskets, Seals & Bushings
- Drivetrain & Transmission Bearings
- Drivetrain & Transmission Mounts
- Engine & Transmission Custom Covers
- Chain Lubes & Cleaners
- Transmission Fluids & Oils
- Gear Oils
- Greases
- Drivetrain & Transmission Tools
Featured Brands
- QuadBoss®Rear Wheel Bearing and Seal Kit (5325-1364)Rear Wheel Bearing and Seal Kit by QuadBoss®. 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...Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques$31.32
- BikeMaster®Quick Connect Rings (150912)Universal Quick Connect Rings by BikeMaster®. Keep the bikes and batteries in your garage ready for a charge Alligator clip leads let you easily attach to any accessible battery while quick disconnect battery terminal leads allow you to...Quick disconnect battery terminal leads are protected with a replaceable fuseColor coded connections for safety$10.36
- OTC®Chain Master Link Plate Tool (4746)Universal Chain Master Link Plate Tool by OTC®. Tool will remove press-fit master link plates found on many standard and O-ring style roller chains. Will also break 40-60 series chains to add a master link or remove links.Made to high standards of qualityDesigned to provide the ultimate in practicality$33.72
- OTC®Chain Tension Puller (4758)Universal Chain Tension Puller by OTC®. Tool is designed to work on drive chains found on motorcycles and ATV's. Fits the following size chains: 428, 520, 525, 528, and 530. Tool jaws fit in chain link ends. Tightening the forcing screw...Made to high standards of qualityDesigned to provide the ultimate in practicality$28.05
- BikeMaster®Center Punch Tool (152179)Universal Center Punch Tool by BikeMaster®. A must-have tool for the shop or garage. With an ergonomic control handle, the Center Punch Tool centers your drill bit to help prevent "walking" across the face of your project. It is...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$18.22
- BikeMaster®Metric Thread Pitch Gauges (152515)Universal Metric Thread Pitch Gauges by BikeMaster®. BikeMaster Thread Pitch Gauges allow you to quickly identify what size replacement bolt you need by accurately measuring internal and external thread pitches. SAE Screw/Thread Pitch...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$12.34
- BikeMaster®Multipurpose Work Cart (152189)Universal Multipurpose Work Cart by BikeMaster®. 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...Ideal for any garage or shopThree levels for multiple project organization. Keeps your parts, hardware, and tools handy$116.76
- BikeMaster®Palm Ratchet Set (152220)Universal Palm Ratchet Set by BikeMaster®. Speed up assembly and disassembly on many of your projects. The BikeMaster® Palm Ratchet Set is made of high-quality chrome vanadium finish for a long life and features a knurled no-slip grip....Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$28.26
- BikeMaster®Replacement Inserts (M6 x 1.0 x 12 mm) (151784)Universal Replacement Inserts (151784) by BikeMaster®. 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...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$11.46
- BikeMaster®Replacement Inserts (M8 x 1.25 x 12 mm) (151785)Universal Replacement Inserts (151785) by BikeMaster®. 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...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$12.35
- BikeMaster®Replacement Inserts (M8 x 1.25 x 16 mm) (151786)Universal Replacement Inserts (151786) by BikeMaster®. 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...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$12.59
- BikeMaster®SAE Thread Pitch Gauges (152514)Universal SAE Thread Pitch Gauges by BikeMaster®. BikeMaster Thread Pitch Gauges allow you to quickly identify what size replacement bolt you need by accurately measuring internal and external thread pitches. SAE Screw/Thread Pitch...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$12.34
- BikeMaster®Seal Puller Kit (152506)Universal Seal Puller Kit by BikeMaster®. 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...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$62.07
- BikeMaster®Terminal Tool (152283)Universal Terminal Tool by BikeMaster®. Every toolbox should have one. Compact design for convenient storage, the Terminal Tool allows easy wire removal from terminal blocks and connectors. It prevents damage to wires and terminal...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$19.26
- BikeMaster®Wobble Extension Bars (1/4" Square) (151535)Universal Wobble Extension Bars (151535) by BikeMaster®. Lets you get to places you couldn't before. The BikeMaster® Wobble Extension Bars allows sockets to be driven at up to 15° off vertical. These 4-piece sets are made of hardened...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$20.03
- BikeMaster®Wobble Extension Bars (3/8" Square) (151536)Universal Wobble Extension Bars (151536) by BikeMaster®. Lets you get to places you couldn't before. The BikeMaster® Wobble Extension Bars allows sockets to be driven at up to 15° off vertical. These 4-piece sets are made of hardened...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$24.60
- Lang Tools®Front Axle Wrench (8598)Universal Front Axle Wrench (8598) by Lang Tools®. Size: 22 mm x 24 mm. 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....Reversible ratcheting wrench used to remove/install the front axle shaft on motorcycles equipped with a female six-point socket in the end of the axleVinyl grip prevents the wrench from scratching or marring the bike$58.84
- Lang Tools®Front Axle Wrench (8577)Universal Front Axle Wrench (8577) by Lang Tools®. Size: 17 mm x 19 mm. 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....Reversible ratcheting wrench used to remove/install the front axle shaft on motorcycles equipped with a female six-point socket in the end of the axleVinyl grip prevents the wrench from scratching or marring the bike$58.84
- COMP Cams®Engine Assembly Lube (104)Engine Assembly Lube by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...Crafted from the highest grade materialsWill deliver years of reliable service$16.95
- COMP Cams®Engine Assembly Lube (102)Engine Assembly Lube by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...Crafted from the highest grade materialsWill deliver years of reliable service$15.95
- CRC®White Lithium Grease 10 oz (05037)White Lithium Grease 10 oz by CRC®. Volume: 10 oz. Designed utilizing the latest technology, this product features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to...A high quality, multi-purpose grease for automotive, shop, and home useProvides long lasting lubrication with excellent water and heat resistance and film strength in any weather or temperature$5.79
- Liqui Moly®LM 48 Assembly Paste (20216)LM 48 Assembly Paste by Liqui Moly®. 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...Made to provide unmatched efficiency and winDesigned to help get the most out of your vehicle$8.39
- Livernois Motorsports®Extreme Assembly Oil (LPP790002)Extreme Assembly Oil by Livernois Motorsports®. Specifically formulated to lubricate the cylinder walls, piston rings, ring grooves, and pistons during engine assembly. Extreme assembly oil is filtered to a purity of 8 microns to ensure...High quality at an affordable priceExpertly made from premium materials$16.99
- Livernois Motorsports®High Pressure Lube (LPP790003)High Pressure Lube by Livernois Motorsports®. Livernois has been using this product in our engine builds for years being far superior to similar products, and we now offer it to you to assemble your engine. Industry has discovered that...High quality at an affordable priceExpertly made from premium materials$10.99
- Lubegard®Platinum Universal ATF Protectant (63032)Universal Platinum Universal ATF Protectant (63032) by Lubegard®. 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....Made with the finest materials to offer premium qualityUnique design to help you show off your personal style$33.88
- Lubegard®Platinum™ High Performance Automatic Transmission Fluid Protectant, 15 oz (63016)Platinum™ High Performance Automatic Transmission Fluid Protectant, 15 oz by Lubegard®. Volume: 15 oz. Quantity: 1 Tube. High Performance. PLATINUM® High-Performance Automatic Transmission Fluid ProtectantMade to provide the perfect lubricant solution for your needsDesigned with innovative manufacturing techniques$17.04
- Lucas Oil®Chain Lubricant (10393)Universal Chain Lubricant (10393) by Lucas Oil®. Lucas Chain Lubricant was developed to be a long lasting, all weather, all temperature lubricant and protectant for chains, sprockets, cables and open gears. It is water resistant and...Built to match your exact requirementsHigh quality you can rely on$7.18
- Lucas Oil®Chain Lubricant (10014)Universal Chain Lubricant (10014) by Lucas Oil®. Lucas Chain Lubricant was developed to be a long lasting, all weather, all temperature lubricant and protectant for chains, sprockets, cables and open gears. It is water resistant and...Built to match your exact requirementsHigh quality you can rely on$10.49
- Lucas Oil®Primary Chaincase Oil (10790)Universal Primary Chaincase Oil (10790) by Lucas Oil®. Volume: 1 qt. Quantity: 1 Piece. Lucas Primary Chaincase Oil is a blend of easy flowing base oils and a Lucas additive package designed to carry away more heat from the clutch...Cool & QuietsDesigned for heavy duty high performance situations$8.32
- Lucas Oil®SAE 75W-90 Synthetic Transmission and Differential Lube (10048)Universal SAE 75W-90 Synthetic Transmission and Differential Lube (10048) by Lucas Oil®. 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...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$50.56
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.