Dirt Bike Drivetrain
Dirt Bike Drivetrain Parts at JJ Motorsports
Enhance your dirt bike’s power transfer with premium drivetrain parts from JJ Motorsports. Find heavy-duty chains, front and rear sprockets, and clutch components designed to withstand intense riding demands. Combine these with other motocross gear and parts to maximize acceleration and ride efficiency on the track or trail.
Shop trusted brands like JT Chains for sealed chains and Renthal for ultralight sprockets. Explore related categories such as Dirt Bike Engine Parts for power upgrades or Dirt Bike Exhaust for complete tuning.
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
-
PARTS UNLIMITED Countershaft Sprocket - 12-Tooth 214-17461-20
PARTS UNLIMITED
$11.17A worn or damaged countershaft sprocket directly impacts power delivery and drivetrain efficiency, making replacement essential for maintaining peak performance. This PARTS UNLIMITED 12-tooth sprocket is manufactured to OEM specifications, ensuring...K222614- SKU:
- K222614
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 12
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RAW
$11.17 -
PARTS UNLIMITED Countershaft Sprocket - 11-Tooth 23804444-000-12
PARTS UNLIMITED
$12.19A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to costly chain wear and performance loss. The PARTS UNLIMITED 11-Tooth Countershaft Sprocket delivers OEM-spec reliability with precision-machined teeth...K222503R- SKU:
- K222503R
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- SPROCKET
- TYPE:
- COUNTERSHAFT
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 11
$12.19 -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 23800-041-000
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket will throw off your entire drivetrain geometry and compromise acceleration response across all gears. This OEM-spec replacement restores the precise 15-tooth engagement your transmission was engineered for,...K222504- SKU:
- K222504
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 15
- CHAIN SIZE:
- 420
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
$7.09Qty in Cart: 0Quantity:Price:$7.09Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 23801-429-000
PARTS UNLIMITED
$15.25A worn or damaged countershaft sprocket directly impacts your engine's power delivery and clutch engagement consistency—critical factors whether you're logging track time or maintaining reliable daily performance. This OEM-spec replacement ensures your...K222504B- SKU:
- K222504B
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- PRODUCT NAME:
- SPROCKET
- TYPE:
- COUNTERSHAFT
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 14
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$15.25 -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 23801-MC4-000
PARTS UNLIMITED
$16.27A worn or damaged countershaft sprocket directly impacts your engine's power delivery and drivetrain efficiency. This OEM-spec replacement ensures precise engagement with your chain, restoring the crisp throttle response and reliable acceleration your...K222504C- SKU:
- K222504C
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 15
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- TYPE:
- COUNTERSHAFT
$16.27 -
PARTS UNLIMITED Countershaft Sprocket - 12-Tooth 23800-045-671
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket compromises power transfer efficiency and accelerates wear on your entire drivetrain. This OEM-spec replacement restores precise engagement with your chain, ensuring reliable acceleration and consistent performance...K222505- SKU:
- K222505
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- TOOTH COUNT:
- 12
- CHAIN SIZE:
- 420
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 23800045-010-13
PARTS UNLIMITED
$8.11A worn or damaged countershaft sprocket will degrade power delivery and accelerate chain wear, creating a cascade of drivetrain problems. This 13-tooth replacement restores OEM performance geometry while the hardened steel construction ensures longevity...K222506- SKU:
- K222506
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- CHAIN SIZE:
- 420
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 13
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
$8.11 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 23801-107-76014
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket directly impacts your power delivery and acceleration responsiveness. This PARTS UNLIMITED 14-tooth sprocket is manufactured to OEM specifications, ensuring precise engagement with your chain and eliminating...K222508- SKU:
- K222508
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 428
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- TOOTH COUNT:
- 14
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 18-Tooth 23801-300-620
PARTS UNLIMITED
$26.47A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency, increasing wear on your chain and reducing power transfer to the rear wheel. This PARTS UNLIMITED 18-tooth sprocket restores OEM-spec engagement and precision,...K222520- SKU:
- K222520
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- CHAIN SIZE:
- 530
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 18
$26.47Qty in Cart: 0Quantity:Price:$26.47Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 16-Tooth 23801344-000-16
PARTS UNLIMITED
$18.31A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to costly chain wear and misalignment. This PARTS UNLIMITED 16-tooth replacement is manufactured to OEM specifications, ensuring perfect engagement with...K222525- SKU:
- K222525
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 16
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
$18.31 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 23801357-810-14
PARTS UNLIMITED
$18.31A worn or damaged countershaft sprocket directly compromises your power delivery and throttle response. This OEM-spec replacement restores precise engagement with your chain, eliminating slack and ensuring consistent acceleration across the entire RPM...K222531- SKU:
- K222531
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 14
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
$18.31 -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 23801357-810-15
PARTS UNLIMITED
$18.31A worn or damaged countershaft sprocket directly impacts your power delivery and overall drivetrain efficiency. This OEM-spec 15-tooth sprocket restores precise engagement with your chain, eliminating slack and ensuring consistent acceleration response...K222532- SKU:
- K222532
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 15
$18.31 -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 23804-360-810
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket robs your engine of efficient power transfer and creates costly drivetrain wear. This PARTS UNLIMITED replacement restores OEM performance specs with precision-machined teeth and splines that engage flawlessly with...K222534- SKU:
- K222534
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- CHAIN SIZE:
- 428
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- RIDING STYLE:
- STREET
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 23804360-810-15
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket will rob your bike of power transfer efficiency and create costly drivetrain wear. This OEM-spec replacement restores precise engagement between your primary and secondary clutches, ensuring consistent acceleration...K222536- SKU:
- K222536
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 15
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- CHAIN SIZE:
- 428
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 23801-329-000
PARTS UNLIMITED
$15.25A worn or damaged countershaft sprocket robs your engine of efficient power transfer and can leave you stranded mid-race or ride. The PARTS UNLIMITED 15-tooth countershaft sprocket restores OEM-spec precision to your drivetrain, ensuring reliable...K222544- SKU:
- K222544
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 15
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
$15.25 -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 23801-330-000
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to costly chain failure or erratic power delivery. This PARTS UNLIMITED 15-tooth sprocket restores OEM-spec performance with precision-machined teeth and...K222549- SKU:
- K222549
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- CHAIN SIZE:
- 428
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- TOOTH COUNT:
- 15
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 23801-348-690
PARTS UNLIMITED
$17.29A worn or damaged countershaft sprocket directly compromises your engine's power delivery and transmission efficiency. This OEM-specification replacement restores precise engagement between your primary and secondary chains, eliminating slack and...K222556- SKU:
- K222556
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- TOOTH COUNT:
- 15
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
$17.29 -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 23801-434-000
PARTS UNLIMITED
$16.27A worn or damaged countershaft sprocket compromises your drivetrain's efficiency and can lead to chain slippage or accelerated wear across your entire transmission system. This OEM-spec 13-tooth sprocket restores precise engagement with your chain,...K222564- SKU:
- K222564
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
$16.27 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 23801-KA4-000
PARTS UNLIMITED
$17.29A worn or damaged countershaft sprocket directly impacts your bike's power delivery and acceleration feel—and a quality replacement is essential for reliable performance. This OEM-spec sprocket ensures perfect mesh with your chain and transmission,...K222578- SKU:
- K222578
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MATERIAL:
- STEEL
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- TOOTH COUNT:
- 14
$17.29 -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 13144-053
PARTS UNLIMITED
$8.11A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to costly secondary failures. This 13-tooth replacement restores precise power delivery and engagement to your stock specifications, eliminating slack...K222711- SKU:
- K222711
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 428
- TOOTH COUNT:
- 13
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
$8.11
