ATV/UTV Drivetrain
ATV/UTV Drivetrain Parts at JJ Motorsports
Enhance your ATV or UTV's power transfer with rugged drivetrain components from JJ Motorsports. Our selection includes differential bearing/seal kits, drive shaft assemblies, reverse chains, and steel plates designed for superior strength, friction resistance, and easy installation in challenging off-road conditions. Compatible with Can-Am, Polaris, Kawasaki, and more, these parts exceed OEM specs for better traction, reduced wear, and reliable performance on trails or utility tasks.
Shop trusted brands like Moose Racing for precision kits. Explore related categories such as ATV/UTV engine parts for rebuilds or ATV/UTV braking for complete systems.
Top ATV/UTV Drivetrain Products
- MOOSE RACING Differential Bearing/Seal Kit - Can-Am - Front/Rear 25-2106 – High-speed EMQ bearings with advanced seals for optimal performance.
- MOOSE RACING Center Drive Shaft Bearing Assembly 25-1671 – Complete assembly with aggressive seals to keep out dirt and water.
- MOOSE RACING Transaxle Reverse Chain 25-8001 – Heat-treated for 4.5% stronger shear strength than OEM.
- MOOSE RACING Steel Drive Plates M80-7800-7 – 300% stronger than aluminum with increased flywheel effect for better traction.
- MOOSE RACING Differential Seal Kit - Front 25-2115-5 – High-quality rubber seals for leak-proof differential protection.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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On Sale
EPI Differential Seal Kit - Front WE290118
EPI
MSRP: $21.99Now: $19.79Was: $21.99A leaking differential is a silent performance killer—oil seepage compromises gear lubrication, increases friction, and accelerates wear on critical drivetrain components. The EPI Differential Seal Kit WE290118 provides a complete seal replacement...12050373- SKU:
- 12050373
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- DIFFERENTIAL
MSRP: $21.99Now: $19.79Was: $21.99Qty in Cart: 0Quantity:Price:MSRP: $21.99Now: $19.79Was: $21.99Subtotal: -
On Sale
EPI Differential Seal Kit - Rear WE290104
EPI
MSRP: $21.99Now: $19.79Was: $21.99Differential seal failure leads to oil leakage, contamination, and catastrophic gear damage—costs that far exceed preventative maintenance. The EPI Differential Seal Kit delivers OEM-quality seals engineered to withstand sustained pressure and...12050364- SKU:
- 12050364
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- DIFFERENTIAL
- RIDING STYLE:
- STREET
- UNITS:
- KIT
MSRP: $21.99Now: $19.79Was: $21.99Qty in Cart: 0Quantity:Price:MSRP: $21.99Now: $19.79Was: $21.99Subtotal: -
On Sale
EPI Differential Seal Kit - Front WE290109
EPI
MSRP: $16.99Now: $15.29Was: $16.99Differential seals are critical wear items that prevent costly oil leakage and contamination—neglecting them leads to gear damage and catastrophic failure. This EPI kit supplies all necessary seals for a complete differential rebuild, eliminating the...12050366- SKU:
- 12050366
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- TYPE:
- DIFFERENTIAL
- PRODUCT NAME:
- BEARING AND SEAL KIT
- UNITS:
- KIT
MSRP: $16.99Now: $15.29Was: $16.99 -
On Sale
EPI Differential Seal Kit - Front and Rear WE290112
EPI
MSRP: $19.99Now: $17.99Was: $19.99Differential seal failure compromises your drivetrain's oil integrity, leading to gear wear, noise, and potential catastrophic failure. The EPI Differential Seal Kit WE290112 gives you everything needed to rebuild your front or rear differential with...12050369- SKU:
- 12050369
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- BEARING AND SEAL KIT
- UNITS:
- KIT
- TYPE:
- DIFFERENTIAL
- RIDING STYLE:
- STREET
MSRP: $19.99Now: $17.99Was: $19.99 -
On Sale
EPI Differential Bearing/Seal Kit - Rear WE290128
EPI
MSRP: $84.99Now: $76.49Was: $84.99Differential seals degrade over time, allowing oil to escape and contaminants to infiltrate—compromising gear lubrication and bearing longevity. The EPI Differential Bearing/Seal Kit delivers a complete OEM-quality rebuild solution, using NBR seals...12050380- SKU:
- 12050380
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- RIDING STYLE:
- ATV
- TYPE:
- DIFFERENTIAL
- PRODUCT NAME:
- BEARING AND SEAL KIT
- UNITS:
- KIT
- POSITION:
- REAR
MSRP: $84.99Now: $76.49Was: $84.99Qty in Cart: 0Quantity:Price:MSRP: $84.99Now: $76.49Was: $84.99Subtotal: -
On Sale
EPI Universal Joint - Kawasaki WE100210
EPI
MSRP: $32.99Now: $29.69Was: $32.99Universal joints are critical wear items that directly impact driveshaft performance, steering response, and overall drivetrain reliability. A worn or damaged U-joint introduces excessive play, vibration, and potential catastrophic failure under...WE100210- SKU:
- WE100210
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- PRODUCT NAME:
- UNIVERSAL JOINT
- TYPE:
- TYPE ONE (INSIDE SNAP RINGS)
- RIDING STYLE:
- ATV
- STYLE:
- WITH U-JOINT
- UNITS:
- KIT
MSRP: $32.99Now: $29.69Was: $32.99Qty in Cart: 0Quantity:Price:MSRP: $32.99Now: $29.69Was: $32.99Subtotal: -
On Sale
EPI Universal Joint - Yamaha ATV WE100395
EPI
MSRP: $31.99Now: $28.79Was: $31.99A failing universal joint compromises your entire drivetrain, leading to vibration, loss of power transfer, and potential catastrophic failure. The EPI Universal Joint WE100395 restores OEM-level performance and reliability without modification, ensuring...WE100395- SKU:
- WE100395
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- RIDING STYLE:
- ATV
- STYLE:
- WITH U-JOINT
- TYPE:
- TYPE ONE (INSIDE SNAP RINGS)
- UNITS:
- KIT
- PRODUCT NAME:
- UNIVERSAL JOINT
MSRP: $31.99Now: $28.79Was: $31.99 -
On Sale
EPI Clutch Kit WE391040
EPI
MSRP: $249.99Now: $224.99Was: $249.99If you're running oversized tires or regularly tackling varied terrain—from trails to work applications—you're likely experiencing power loss and sluggish throttle response. The EPI Clutch Kit WE391040 restores that lost performance by optimizing...WE391040- SKU:
- WE391040
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- FOR TIRE SIZE IMPERIAL:
- 27' - 28'
- RIDING STYLE:
- ATV
- TYPE:
- CENTRIFUGAL
- ELEVATION IMPERIAL:
- 0' - 3000'
- PRODUCT NAME:
- CLUTCH KIT
- RIDING STYLE:
- UTV
- UNITS:
- KIT
MSRP: $249.99Now: $224.99Was: $249.99Qty in Cart: 0Quantity:Price:MSRP: $249.99Now: $224.99Was: $249.99Subtotal: -
On Sale
EPI Economy Clutch Kit WE490400
EPI
MSRP: $119.99Now: $107.99Was: $119.99Trail riding demands consistent belt engagement and predictable shift characteristics across varying terrain and tire sizes. The EPI Economy Clutch Kit WE490400 delivers improved belt grip and smoother back shifts, letting you focus on the trail instead...WE490400- SKU:
- WE490400
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- PRODUCT NAME:
- CLUTCH KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- FOR TIRE SIZE IMPERIAL:
- ANY
- ELEVATION IMPERIAL:
- ANY
- RIDING STYLE:
- UTV
- TYPE:
- CENTRIFUGAL
MSRP: $119.99Now: $107.99Was: $119.99Qty in Cart: 0Quantity:Price:MSRP: $119.99Now: $107.99Was: $119.99Subtotal: -
On Sale
EPI Economy Clutch Kit WE497010
EPI
MSRP: $69.99Now: $62.99Was: $69.99If you're running a CVT-equipped machine and want predictable belt engagement across varying terrain and tire setups, this spring kit directly addresses drivetrain responsiveness. The tuned spring rates optimize your clutch's shift characteristics,...WE497010- SKU:
- WE497010
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- ELEVATION IMPERIAL:
- ANY
- FOR TIRE SIZE IMPERIAL:
- ANY
- RIDING STYLE:
- UTV
- TYPE:
- CENTRIFUGAL
- UNITS:
- KIT
- PRODUCT NAME:
- CLUTCH KIT
- RIDING STYLE:
- ATV
MSRP: $69.99Now: $62.99Was: $69.99Qty in Cart: 0Quantity:Price:MSRP: $69.99Now: $62.99Was: $69.99Subtotal: -
On Sale
EPI Primary Spring PATV4
EPI
MSRP: $32.99Now: $29.69Was: $32.99Dial in your CVT engagement point and peak RPM with precision—the EPI Primary Spring PATV4 gives you direct control over clutch behavior without guesswork or expensive dyno tuning. Whether you're chasing track times or dialing in a custom build, this...PATV4- SKU:
- PATV4
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COMPRESSED LOAD METRIC:
- 82.5 KG
- INSTALLED LOAD METRIC:
- 54.5 KG
- RIDING STYLE:
- ATV
- TYPE:
- CLUTCH
- COLOR/FINISH:
- PURPLE
- COMPRESSED LOAD IMPERIAL:
- 182 LB
- MATERIAL:
- CHROME SILICON
- STYLE:
- PRIMARY (DRIVE)
- RIDING STYLE:
- UTV
- UNITS:
- EACH
- COMPRESSED LENGTH IMPERIAL:
- 1.25'
- COMPRESSED LOAD:
- 82,5 KG (182 LB)
- INSTALLED LENGTH IMPERIAL:
- 2.5'
- INSTALLED LOAD IMPERIAL:
- 120 LB
- PRODUCT NAME:
- SPRING
MSRP: $32.99Now: $29.69Was: $32.99Qty in Cart: 0Quantity:Price:MSRP: $32.99Now: $29.69Was: $32.99Subtotal: -
On Sale
EPI Clutch Kit WE437537
EPI
MSRP: $279.99Now: $251.99Was: $279.99If you're running oversized tires or tackling variable terrain, the EPI Clutch Kit WE437537 restores the low-end punch and responsive throttle feel your UTV loses in the process. This kit eliminates belt slip and heat buildup while delivering snappier...11400730- SKU:
- 11400730
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- ELEVATION IMPERIAL:
- 0' - 3000'
- FOR TIRE SIZE IMPERIAL:
- 27' - 28'
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- CLUTCH KIT
- RIDING STYLE:
- ATV
- TYPE:
- CENTRIFUGAL
- UNITS:
- KIT
MSRP: $279.99Now: $251.99Was: $279.99Qty in Cart: 0Quantity:Price:MSRP: $279.99Now: $251.99Was: $279.99Subtotal: -
On Sale
EPI Primary Spring - Polaris PATV11
EPI
MSRP: $32.99Now: $29.69Was: $32.99Fine-tuning your primary clutch engagement is essential for maximizing acceleration, top-end RPM, and overall driveline efficiency. The EPI Primary Spring for Polaris PATV11 gives you direct control over clutch behavior without compromising reliability...11400412- SKU:
- 11400412
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- COMPRESSED LENGTH IMPERIAL:
- 1.25'
- COMPRESSED LOAD:
- 66 KG (145 LB)
- COMPRESSED LOAD METRIC:
- 66 KG
- INSTALLED LOAD:
- 25 KG (55 LB)
- RIDING STYLE:
- ATV
- TYPE:
- CLUTCH
- COLOR/FINISH:
- GREEN
- COMPRESSED LENGTH:
- 32 MM (1,25')
- RIDING STYLE:
- UTV
- COMPRESSED LENGTH METRIC:
- 32 MM
- COMPRESSED LOAD IMPERIAL:
- 145 LB
- INSTALLED LOAD IMPERIAL:
- 55 LB
- INSTALLED LOAD METRIC:
- 25 KG
- MATERIAL:
- CHROME SILICON
- UNITS:
- EACH
- INSTALLED LENGTH:
- 64 MM (2,5')
- INSTALLED LENGTH IMPERIAL:
- 2.5'
- INSTALLED LENGTH METRIC:
- 64 MM
- PRODUCT NAME:
- SPRING
- STYLE:
- PRIMARY (DRIVE)
MSRP: $32.99Now: $29.69Was: $32.99Qty in Cart: 0Quantity:Price:MSRP: $32.99Now: $29.69Was: $32.99Subtotal: -
On Sale
EPI Clutch Kit WE437459
EPI
MSRP: $269.99Now: $242.99Was: $269.99If your riding demands versatility—whether you're tackling trails, occasional mud, sand, or hauling loads—belt slippage and delayed throttle response will cost you performance and increase clutch heat. The EPI Clutch Kit WE437459 is engineered to...11400670- SKU:
- 11400670
- Availability:
- Ships Same Business Day
- Weight:
- 1.18 LBS
- UNITS:
- KIT
- FOR TIRE SIZE IMPERIAL:
- STOCK
- PRODUCT NAME:
- CLUTCH KIT
- RIDING STYLE:
- UTV
- TYPE:
- CENTRIFUGAL
- ELEVATION IMPERIAL:
- 0' - 3000'
- RIDING STYLE:
- ATV
MSRP: $269.99Now: $242.99Was: $269.99Qty in Cart: 0Quantity:Price:MSRP: $269.99Now: $242.99Was: $269.99Subtotal: -
On Sale
EPI Clutch Kit WE437461
EPI
MSRP: $269.99Now: $242.99Was: $269.99If you're running oversized tires or frequently hauling loads, you're fighting against power loss and sluggish throttle response—the EPI Clutch Kit WE437461 solves both problems. This kit restores the low-end and midrange punch you've lost to tire weight...11400671- SKU:
- 11400671
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- ELEVATION IMPERIAL:
- 0' - 3000'
- RIDING STYLE:
- UTV
- FOR TIRE SIZE IMPERIAL:
- 30' - 32'
- PRODUCT NAME:
- CLUTCH KIT
- RIDING STYLE:
- ATV
- TYPE:
- CENTRIFUGAL
- UNITS:
- KIT
MSRP: $269.99Now: $242.99Was: $269.99Qty in Cart: 0Quantity:Price:MSRP: $269.99Now: $242.99Was: $269.99Subtotal: -
On Sale
EPI Clutch Kit WE437339
EPI
MSRP: $374.99Now: $337.49Was: $374.99If you're running a workhorse machine that handles everything from trail riding to hauling and plowing, you need a clutch kit engineered for versatility without compromise. The EPI WE437339 eliminates belt slippage, reduces clutch heat, and sharpens...11400620- SKU:
- 11400620
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- PRODUCT NAME:
- CLUTCH KIT
- UNITS:
- KIT
- TYPE:
- CENTRIFUGAL
- FOR TIRE SIZE IMPERIAL:
- STOCK
- RIDING STYLE:
- UTV
- ELEVATION IMPERIAL:
- 0' - 3000'
MSRP: $374.99Now: $337.49Was: $374.99Qty in Cart: 0Quantity:Price:MSRP: $374.99Now: $337.49Was: $374.99Subtotal: -
On Sale
EPI Clutch Kit WE437341
EPI
MSRP: $374.99Now: $337.49Was: $374.99If you're running oversized tires or regularly tackling trail, mud, and sand terrain, the EPI Clutch Kit WE437341 restores the low-end and midrange acceleration that larger tires naturally suppress. This bolt-on upgrade delivers quicker backshifts and...11400621- SKU:
- 11400621
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- UNITS:
- KIT
- ELEVATION IMPERIAL:
- 0' - 3000'
- FOR TIRE SIZE IMPERIAL:
- 27' - 28'
- PRODUCT NAME:
- CLUTCH KIT
- RIDING STYLE:
- UTV
- TYPE:
- CENTRIFUGAL
MSRP: $374.99Now: $337.49Was: $374.99Qty in Cart: 0Quantity:Price:MSRP: $374.99Now: $337.49Was: $374.99Subtotal: -
On Sale
EPI Clutch Kit WE436926
EPI
MSRP: $249.99Now: $224.99Was: $249.99If your UTV sees action across multiple terrains and riding styles, the EPI Clutch Kit WE436926 is engineered to keep up without compromise. This all-around performer reduces belt slippage and heat buildup while sharpening low- and mid-range...11400433- SKU:
- 11400433
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- ELEVATION IMPERIAL:
- 0' - 3000'
- RIDING STYLE:
- UTV
- TYPE:
- CENTRIFUGAL
- FOR TIRE SIZE IMPERIAL:
- STOCK
- PRODUCT NAME:
- CLUTCH KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
MSRP: $249.99Now: $224.99Was: $249.99Qty in Cart: 0Quantity:Price:MSRP: $249.99Now: $224.99Was: $249.99Subtotal: -
On Sale
EPI Clutch Kit WE437102
EPI
MSRP: $354.99Now: $319.49Was: $354.99If your riding duties span everything from trail work to hauling and plowing, you need a clutch kit engineered for versatility without compromise. The EPI WE437102 delivers improved low- and mid-range acceleration while actively reducing belt slippage...11400522- SKU:
- 11400522
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- ELEVATION IMPERIAL:
- 0' - 3000'
- RIDING STYLE:
- ATV
- FOR TIRE SIZE IMPERIAL:
- STOCK
- PRODUCT NAME:
- CLUTCH KIT
- RIDING STYLE:
- UTV
- TYPE:
- CENTRIFUGAL
- UNITS:
- KIT
MSRP: $354.99Now: $319.49Was: $354.99Qty in Cart: 0Quantity:Price:MSRP: $354.99Now: $319.49Was: $354.99Subtotal: -
On Sale
EPI Clutch Kit WE437095
EPI
MSRP: $239.99Now: $215.99Was: $239.99If you run your UTV for multiple purposes—from trail riding to hauling and plowing—a one-size-fits-all clutch setup leaves performance on the table. The EPI Clutch Kit WE437095 is engineered to deliver responsive low- and mid-range acceleration across...11400530- SKU:
- 11400530
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- FOR TIRE SIZE IMPERIAL:
- STOCK
- PRODUCT NAME:
- CLUTCH KIT
- RIDING STYLE:
- ATV
- ELEVATION IMPERIAL:
- 0' - 3000'
- RIDING STYLE:
- UTV
- TYPE:
- CENTRIFUGAL
- UNITS:
- KIT
MSRP: $239.99Now: $215.99Was: $239.99Qty in Cart: 0Quantity:Price:MSRP: $239.99Now: $215.99Was: $239.99Subtotal:
