YAMAHA YZ250 Transmission & Drivetrain

Renthal Ultralight Rear Sprockets

Renthal Ultralight rear sprockets will withstand the rigors of supercross, motocross, and enduro racing. Manufactured to extremely tight tolerances, they are 66 percent lighter than steel, and yet incredibly durable. Renthal uses computer-aided design, high-strength specially enhanced 7075 T-6 aluminum alloy, and CNC-machining to produce sprockets that are high-strength, hard-wearing, and offer the maximum reduction of unsprung weight at the rear wheel for maximum power transfer. They've also added self-cleaning mud grooves between every tooth on both sides to prevent dirt buildup. Shouldn't you choose the sprockets chosen by more factory race teams? Join a winning team and install Renthal Ultralight rear sprockets.

5.0 out of 5 stars ( 2 )

$82.99

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$94.15

All Balls Racing Wheel and Carrier Bearing Seal Kits

All Balls Racing wheel and carrier bearing seal kits are hands-down the most complete line of bearing seal kits on the market! They are available in a wide variety of powersports applications, from ATV and off-road to street bikes. These All Balls Racing wheel and carrier bearing seal kits have premium high-speed bearings that feature low-drag, double-lip seals on both sides to provide superior exclusion of water and dirt and improved grease retention. High performance Chevron SRI-II grease features special rust inhibitors for the most demanding applications. Type TC nitrile elastomer wheel seals are specifically designed to keep out water and dirt. Their rubber coated outside diameter helps to create an optimum seal at the hub.

4.45 out of 5 stars ( 20 )

$14.36

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$36.31

Wiseco Clutch Pack Kits

Upgrade to Wiseco clutch pack kits for extreme powersports riding conditions. Your worn-out clutch plates and springs need a change. Wiesco clutch pack kits have everything you need for your off-road bike and/or ATV. Each kit comes with new frictions, steels, and clutch springs, all made from premium-grade materials. Their frictions and steels are made to exact OEM tolerances and specifications and produce the same feel and wear resistance as stock plates. Their clutch springs are 8-10 percent stiffer than stock to ensure a positive clutch lockup every time. Do you have a slipping clutch pack? Wiseco clutch pack kits are an easy solution!

5.0 out of 5 stars ( 1 )

$174.99

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$177.99

Renthal Twinring Sprockets

Renthal Twinring sprockets are truly unique hybrid sprockets that will keep you spinning around the track. Twinring off-road sprockets are made of long-lasting and durable material--a high-strength, ultra-light 7075 T-6 aluminum inner core and an electroless nickel coated steel outer ring are permanently bonded together. They are precision CNC-machined to tight tolerances and feature a flat face design that keeps weight to a minimum and makes them as narrow as regular sprockets! Self-cleaning mud grooves are added between every tooth on both sides to prevent dirt buildup, plus flat socket head screws add additional strength to the sprockets during side impacts. Try double durability with less weight on your dirt bike with the addition of Twinring sprockets from Renthal.

Not Yet Reviewed

$128.26

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$134.99

EBC Standard CK Series Clutch Friction Discs

EBC standard CK series clutch friction discs are almost identical to original equipment clutch plates. These discs are cork-based products impregnated with aluminum particles to increase wear life and heat resistance. These clutch plates are compressed to avoid swell and clutch drag and feature an ideal general-purpose replacement material for all grades and sizes of motorcycles. Springs and clutch plates are sold separately.

5.0 out of 5 stars ( 5 )

$87.50

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$102.81

All Balls Racing Chain Rollers

Powersports chain rollers are parts you know will eventually need to be changed out--simply because of the job they perform. All Balls Racing has a full line of direct replacement chain rollers for upper and lower-position OEM designs. Most feature inboard precision ball bearings with two rubber seals, and a double lip outer mechanical seal to protect the bearings from dirt and water. They're cast from 98 Durometer polyurethane for durability and come available in various dimensions to fit motorcycles and ATV/UTV makes, such as Kawasaki, Suzuki, Yamaha, Honda®, Arctic Cat, and Polaris. Color options on some All Balls Racing chain rollers include black, blue, red, and clear.

Not Yet Reviewed

$21.73

Renthal Ultralight Front Sprockets

Renthal ultralight front sprockets epitomize what a premium motocross sprocket should be. Renthal's iconic 'ultralight' lightening pattern reduces unnecessary weight and disperses chain load. Precision CNC-machining results in extremely close tolerances. These front chainwheels are made from case-hardened nickel chromoly steel and are then finished with surface coatings to reduce wear and increase drivetrain life. Furthermore, machined self-cleaning grooves in between each tooth resists dirt and mud build-up that would otherwise be trapped between the chainwheel and the chain. Renthal motocross front sprockets are simply the finest front chainwheels on the market today, and why they are the number one choice used by many of the world's premier athletes and race teams.

Not Yet Reviewed

$43.16

Renthal Grooved Front Sprockets

Renthal grooved front sprockets are simply the finest front chainwheels on the market today. They are designed to offer excellent durability with a lightweight design which delivers maximum power transfer. Each sprocket is CNC-machined from cased hardened and core refined 655M13 nickel chromium steel. Mud grooves are then CNC-machined into each tooth on both sides of these components to allow mud to flow away from the key contact points between the chain and the sprocket. This unique design helps reduce wear and can dramatically increase the lifespan of your drivetrain. Maximize your performance with the ultimate front sprockets from Renthal.

Not Yet Reviewed

$34.16

EBC CSK Clutch Springs

New EBC CSK clutch springs prevent damage from prolonged exposure to heat and wear. They are OEM upgrades and are 10 percent stiffer than stock. The lever will be slightly stiffer which can wear your hand out riding in heavy traffic, but in return the clutch engages smoother and faster with the stiffer springs making takeoff smooth and shifting faster and less effort to speed shift.

5.0 out of 5 stars ( 3 )

$12.98

Acerbis Chain Guide Inserts

Replace your worn-out chain guides with Acerbis chain guide inserts. These injection-molded polyurethane inserts are strong and use all OEM mounts and hardware. Acerbis chain guide inserts cost less and they look and wear better than stock.

Not Yet Reviewed

$28.01

EBC CKF Carbon Fiber Lined MX Race Clutch Plate Sets

EBC CKF carbon fiber lined MX race clutch plate sets are built tough to last longer, grip better, feel better, and drive better than stock cork-based units. Plus, the high-heat ability of EBC CKF carbon fiber-lined MX race clutch plate sets handle much higher stresses and temperatures encountered in racing yet feel gentle and smooth in everyday riding. One day, all Motocross bikes and ATVs will be built using a clutch like this, but for now the only way to get the best clutch in the game is to step up to EBC CKF carbon fiber-lined MX race clutch plate sets.

Not Yet Reviewed

$160.33

Wiseco Powersports Clutch Plates

Wiseco Powersports clutch plates are the ideal choice for your bike. Manufactured from premium-grade materials, they are machined to OEM tolerances and will hold up under extreme riding conditions. Choose the proper alloy or steel design for your motorcycle.

Not Yet Reviewed

$32.99

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$39.99

ProTaper Front Sprockets

Outlast and outperform the competition with ProTaper front sprockets! They are precision-broached and machined from case-hardened chromoly steel to the strictest standards. These sprockets feature self-cleaning mud grooves to prevent dirt and mud buildup, along with lightening holes that reduce sprocket weight. ProTaper front sprockets have a special wear-resistant coating that helps to retain strength and durability, with an etched tooth number for easy identification.

Not Yet Reviewed

$29.99

ProTaper MX RS Rear Sprockets

ProTaper MX RS (Race Spec) rear sprockets are the ultimate choice for motocross performance. Constructed from 7075 T-6 heat-treated aluminum, these sprockets are precision CNC-machined to the strictest quality standards. They feature a proprietary mud groove design that results in 44 percent more tooth surface area, which dramatically increases sprocket life. Their deep-penetrating anodized finish is durable and looks great, too! The number of teeth is laser-etched onto each MX RS sprocket for easy identification. Outlast the competition with ProTaper MX RS (Race Spec) rear sprockets!

Not Yet Reviewed

$96.99

Sunstar Powerdrive Countershaft Sprockets

Sunstar Powerdrive countershaft sprockets are long-lasting sprockets designed for exceptional durability and reliability. They are constructed from case-hardened chromoly steel and are specially treated to resist rust and corrosion. Sunstar has supplied the global market with the deepest range of sprocket options since 1946, and their Powerdrive countershaft sprockets are another example of their leading-edge design, testing, and technology. Always gear-up with Sunstar Powerdrive countershaft sprockets to maintain a top-performing bike.

5.0 out of 5 stars ( 1 )

$15.50

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$16.50

Wiseco Inner Clutch Hubs

Wiseco leads the clutch aftermarket with high performance inner hubs. OEM inner hubs are made from inexpensive die-castings that quickly wear out. Wiseco offers the only forged clutch components in the aftermarket for off-road bikes and ATV applications. If you're serious about performance and need new inner clutch hubs, get the best. Get Wiseco.

Not Yet Reviewed

$305.99

Rekluse Clutch Friction Disc Kits

Rekluse Clutch friction disc kits are available in several sizes to service numerous dirt bike models. These sets will replace worn friction discs to ensure proper clutch engagement and the efficient transfer of power from the engine to the wheels. Select the Rekluse friction disc kit designed for your bike.

Not Yet Reviewed

$139.00

Wiseco Clutch Components

Wiseco is known for their craftsmanship and high performance products. These clutch components will help you get that clutch rebuilt and keep your ride shifting smoothly through the entire race. You're sure to find what you need here, with various gears, screws, and parts available to complete your clutch project. Find the right match for your application and get your ride back on the track.

Not Yet Reviewed

$0.69

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$131.99

Motion Pro Standard Black Vinyl Clutch Cables

Motion Pro standard black vinyl clutch cables provide smooth and precise control of your clutch. Affordable alternatives to OEM cables, these replacements are designed to meet or exceed OE quality. They feature a coil wound housing and an inner nylon sleeve for longer life and smooth operation. Motion Pro standard black vinyl clutch cables are available in a wide variety of applications.

4.57 out of 5 stars ( 7 )

$8.49

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$31.89

Pro-X Racing Parts Clutch Cables

Pro-X Racing Parts clutch cables are high-quality products that meet or even exceed OEM quality, and are manufactured to exact OEM specifications to offer maximum performance and the perfect fit. Pro-X Racing Parts clutch cables are equipped with pre-lubricated nylon inner sleeves and tightly coiled inner casings, along with a flexible PVC outer jacket and strong steel inner cable for high durability and smooth control. They are easy to assemble thanks to the appropriate length with all necessary mounting parts supplied. Choose the clutch cables designed for your dirt bike application. Features: * Black PVC outer jacket for maximum flexibility and durability * Steel inner casing that is tightly coiled for low compression * Pre-lubricated nylon inner sleeve for smooth operation and long life * All wire ends are bird caged prior to terminal casting for superior pull-out resistance

Not Yet Reviewed

$19.99

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$29.99

EBC DRC Dirt Racer Clutch Kits

By far the best way to go, EBC DRC Dirt Racer clutch kits are total rebuild options, including all-driven lined plates and new springs to completely reset your clutch to the all-important original stack height from when the bike was new. DRC Dirt Racer clutch kits give smooth clutch take-up, using anti-swelling, alloy-impregnated, heavy-duty, cork-based facing for long-lasting and reliable clutch kits.

4.5 out of 5 stars ( 2 )

$126.40

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$227.26

Pro-X Racing Parts Clutch Spring Kits

ProX heavy-duty clutch spring kits feature an approximately 10 percent stiffer design than OEM springs and will reduce clutch slippage under extreme conditions for maximum control and instant drive. They help ensure a positive clutch lockup, while also providing a high-performance feel and durability. Find out for yourself why Pro-X Racing Parts clutch spring kits are a top replacement option, especially for professional drivers, when you order the kit designed to fit your application. Other features, items, and specifications include: * Made from the toughest materials available * Pre-set, shot-peened, heat-treated, and designed to exceed OEM performance and durability * Sold in complete kits for each application * Full range of spring kits for MX and ATV models available from ready stock

Not Yet Reviewed

$35.99

Acerbis 2.0 Chain Guide Inserts

Acerbis offers 2.0 chain guide inserts for a wide range of off-road motorcycles—including models from Kawasaki, Yamaha, and Honda®. These two-piece OEM quality replacement wear blocks (for the stock chain guide) facilitate easy mounting without chain removal. They're constructed of PA6 nylon polymer for high resistance to chain wear and shock; the material will not bend in the event of a collision or contact with roost. Order the inserts recommended for your bike.

Not Yet Reviewed

$22.06

Motion Pro Terminator LW Clutch Cables

Motion Pro Terminator LW clutch cables deliver a precise, positive, non-mushy feel for enhanced performance. Their longitudinally wound (LW) housings resist compression under heavy loads, offering smooth and precise clutch operation. Outfit your motorcycle with Motion Pro Terminator LW clutch cables.

Not Yet Reviewed

$46.19