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
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SUPERSPROX Countershaft Sprocket - 12-Tooth CST-284-12-1
SUPERSPROX
$24.95A countershaft sprocket is your direct connection to power delivery—choose one engineered for reliability, and you eliminate premature wear, chain slippage, and mid-race failures. The SUPERSPROX CST-284-12-1 delivers factory racing durability with a...12121355- SKU:
- 12121355
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TOOTH COUNT:
- 12
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
$24.95Qty in Cart: 0Quantity:Price:$24.95Subtotal: -
SUPERSPROX Countershaft Sprocket - 14-Tooth CST-284-14-1
SUPERSPROX
$29.95Chain slippage and premature sprocket wear can cost you races and rebuild budgets. The SUPERSPROX 14-tooth countershaft sprocket delivers the durability and precision of factory racing specification parts, engineered to survive extreme loads without...12121357- SKU:
- 12121357
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- TOOTH COUNT:
- 14
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal: -
SUPERSPROX Countershaft Sprocket - 15-Tooth CST-284-15-1
SUPERSPROX
$29.95If you're running a countershaft sprocket that can't handle the demands of aggressive riding or racing, you're leaving performance on the table and risking catastrophic failure mid-ride. The SUPERSPROX CST-284-15-1 delivers the durability and efficiency...12121358- SKU:
- 12121358
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- TOOTH COUNT:
- 15
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
$29.95 -
SUPERSPROX Countershaft Sprocket - 15-Tooth CST-1309-15-1
SUPERSPROX
$29.95If you're running a countershaft sprocket that's letting you down with chain drag losses and premature wear, you're leaving performance on the table. The SUPERSPROX 15-tooth countershaft sprocket is engineered with the same specifications trusted by...12121360- SKU:
- 12121360
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- CHAIN SIZE:
- 520
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- TOOTH COUNT:
- 15
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal: -
SUPERSPROX Countershaft Sprocket - 16-Tooth CST-546-16-1
SUPERSPROX
$24.95If you're running a countershaft sprocket that's holding back your power delivery, a lightweight, precision-engineered replacement is non-negotiable. The SUPERSPROX 16-tooth countershaft sprocket eliminates chain drag losses and resists tooth wear...12121387- SKU:
- 12121387
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 420
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 16
- TYPE:
- COUNTERSHAFT
- MATERIAL:
- STEEL
- UNITS:
- EACH
$24.95 -
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-1442-13-1
SUPERSPROX
$24.95If you're pushing your bike hard on track or trail, sprocket wear translates directly to power loss and premature chain failure. The SUPERSPROX Countershaft Sprocket eliminates that risk with factory-grade materials and precision engineering that...12121423- SKU:
- 12121423
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- MATERIAL:
- STEEL
- TOOTH COUNT:
- 13
- UNITS:
- EACH
$24.95Qty in Cart: 0Quantity:Price:$24.95Subtotal: -
SUPERSPROX Countershaft Sprocket - 15-Tooth CST-1902-15-1
SUPERSPROX
$29.95Countershaft sprockets are the foundation of reliable power delivery—a weak link here means lost acceleration, premature chain wear, and potential mid-race failure. The SUPERSPROX CST-1902-15-1 is engineered with the same uncompromising standards that...12121424- SKU:
- 12121424
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- CHAIN SIZE:
- 520
- TOOTH COUNT:
- 15
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal: -
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-1565-13-1
SUPERSPROX
$24.95Countershaft sprockets are a critical wear item in high-demand racing and off-road applications—running a compromised sprocket invites chain slip, power loss, and catastrophic drivetrain failure. The SUPERSPROX 13-tooth countershaft sprocket delivers the...12121335- SKU:
- 12121335
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MATERIAL:
- STEEL
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- TOOTH COUNT:
- 13
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
$24.95 -
SUPERSPROX Countershaft Sprocket - 14-Tooth CST-1565-14-1
SUPERSPROX
$24.95A countershaft sprocket is your direct connection to power delivery—wear or friction here means lost horsepower and premature chain failure. The SUPERSPROX 14-tooth delivers factory racing durability with a hardened surface layer that cuts friction and...12121336- SKU:
- 12121336
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 14
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
$24.95 -
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-824-13-1
SUPERSPROX
$29.95If you're running a countershaft sprocket that can't handle aggressive acceleration or sustained high RPM demands, you're leaving performance on the table—and risking catastrophic failure mid-race or ride. The SUPERSPROX 13-Tooth Countershaft Sprocket is...12121404- SKU:
- 12121404
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal: -
SUPERSPROX Countershaft Sprocket - 14-Tooth CST-827-14-1
SUPERSPROX
$34.95If you're running a countershaft sprocket that can't handle sustained power delivery or extended race sessions, you're leaving performance on the table and risking catastrophic failure mid-ride. The SUPERSPROX CST-827-14-1 is engineered with the same...12121407- SKU:
- 12121407
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- TOOTH COUNT:
- 14
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
$34.95 -
SUPERSPROX Steel Rear Sprocket - 40-Tooth RFE-853-40-BLK
SUPERSPROX
$44.95A worn or undersized rear sprocket limits your engine's ability to transfer power efficiently to the wheel, causing sluggish acceleration and increased drivetrain wear. The SUPERSPROX 40-tooth steel sprocket combines race-proven durability with a...12101932- SKU:
- 12101932
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 40
- TYPE:
- REAR
- UNITS:
- EACH
$44.95Qty in Cart: 0Quantity:Price:$44.95Subtotal: -
SUPERSPROX Stealth Rear Sprocket - 48-Tooth - Gold - Yamaha RST-245-48-GLD
SUPERSPROX
$119.95Supersprox-Stealth rear sprockets deliver the durability of steel teeth with the weight savings of an aluminum core—a combination that extends drivetrain life while maintaining responsive handling. If you're serious about sustained performance without...12101980- SKU:
- 12101980
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- COLOR/FINISH:
- GOLD
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- REAR
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- ALUMINUM
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
$119.95 -
SUPERSPROX Stealth Rear Sprocket - 48-Tooth - Gold - Kawasaki RST-808-48-GLD
SUPERSPROX
$119.95Rear sprocket wear is one of the fastest wear items on any motorcycle, and choosing the wrong material means replacing it every season. The SUPERSPROX Stealth combines a lightweight aluminum core with hardened steel teeth, giving you the durability of a...12102043- SKU:
- 12102043
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- CHAIN SIZE:
- 520
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- GOLD
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- REAR
$119.95 -
SUPERSPROX Stealth Rear Sprocket - 51-Tooth - Gold - Kawasaki RST-808-51-GLD
SUPERSPROX
$119.95Rear sprocket wear is one of the fastest-wearing drivetrain components, and stock aluminum options can leave you stranded mid-season. The SUPERSPROX Stealth 51-tooth sprocket combines a steel-tooth design with a lightweight aluminum core, delivering four...12102046- SKU:
- 12102046
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- COLOR/FINISH:
- GOLD
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- CHAIN SIZE:
- 520
- MATERIAL:
- ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 51
$119.95 -
SUPERSPROX Stealth Rear Sprocket - 52-Tooth - Gold - Kawasaki RST-808-52-GLD
SUPERSPROX
$119.95If you're running a high-displacement Kawasaki and tired of replacing worn sprockets every season, the SUPERSPROX Stealth delivers the durability of steel without the weight penalty. The hybrid steel-tooth, aluminum-core design gives you four times the...12102047- SKU:
- 12102047
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- MATERIAL:
- ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- STEALTH
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 52
- COLOR/FINISH:
- GOLD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$119.95 -
SUPERSPROX Stealth Rear Sprocket - 50-Tooth - Gold - Husaberg RST-990-50-GLD
SUPERSPROX
$119.95The Supersprox Stealth 50-tooth rear sprocket delivers a rare balance of lightweight performance and exceptional durability—steel teeth that outlast aluminum by 4x while the forged aluminum core keeps rotational mass minimal. If you're running a...12102058- SKU:
- 12102058
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- UNITS:
- EACH
- COLOR/FINISH:
- GOLD
$119.95 -
SUPERSPROX Stealth Rear Sprocket - 51-Tooth - Gold - Husaberg RST-990-51-GLD
SUPERSPROX
$119.95If you're running a high-displacement bike and want sprocket durability without the weight penalty, the SUPERSPROX Stealth delivers a rare combination: steel teeth that outlast aluminum by 4x, paired with a 70% lighter aluminum core. This is the...12102059- SKU:
- 12102059
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- COLOR/FINISH:
- GOLD
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MATERIAL:
- ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 51
$119.95 -
SUPERSPROX Stealth Rear Sprocket - 52-Tooth - Gold - Husaberg RST-990-52-GLD
SUPERSPROX
$119.95If you're running a high-displacement bike and want sprocket longevity without sacrificing performance, the SUPERSPROX Stealth delivers. Steel teeth that outlast aluminum by 4x mean fewer replacements and more time on the track. This hybrid design...12102060- SKU:
- 12102060
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- COLOR/FINISH:
- GOLD
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- MATERIAL:
- ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 52
- UNITS:
- EACH
$119.95 -
SUPERSPROX Stealth Rear Sprocket - 49-Tooth - Orange - Husaberg RST-990-49-ORG
SUPERSPROX
$119.95If you're running a high-displacement bike that demands reliability without sacrificing handling, the SUPERSPROX Stealth Rear Sprocket delivers the durability of steel with the weight savings of aluminum—a rare combination that extends your drivetrain...12102063- SKU:
- 12102063
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- COLOR/FINISH:
- ORANGE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- TOOTH COUNT:
- 49
$119.95Qty in Cart: 0Quantity:Price:$119.95Subtotal:
