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
-
On Sale
SUPERSPROX Edge Rear Sprocket - Black - 47-Tooth RFA82947BLK
SUPERSPROX
MSRP: $54.95Now: $46.71Was: $54.95If you're running mid-range performance builds or looking to trim rotating mass without breaking the bank, the SUPERSPROX Edge 47-Tooth Rear Sprocket delivers measurable weight savings that translate directly to faster acceleration and easier engine...12102396- SKU:
- 12102396
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
- COLOR/FINISH:
- ZINC
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
- MODEL:
- EDGE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- LIGHTWEIGHT
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
MSRP: $54.95Now: $46.71Was: $54.95Qty in Cart: 0Quantity:Price:MSRP: $54.95Now: $46.71Was: $54.95Subtotal: -
On Sale
SUPERSPROX Edge Rear Sprocket - Black - 38-Tooth RFA846238BLK
SUPERSPROX
MSRP: $49.95Now: $42.46Was: $49.95If you're running a mid-range bike and looking to shed unsprung weight without breaking the bank, the SUPERSPROX Edge Rear Sprocket delivers measurable gains in acceleration and handling response. By reducing rotating mass by 5-15%, you'll feel the...12102397- SKU:
- 12102397
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- UNITS:
- EACH
- MODEL:
- EDGE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- STYLE:
- LIGHTWEIGHT
- TOOTH COUNT:
- 38
- COLOR/FINISH:
- ZINC
- MATERIAL:
- STEEL
MSRP: $49.95Now: $42.46Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.46Was: $49.95Subtotal: -
On Sale
SUPERSPROX Edge Rear Sprocket - Black - 44-Tooth RFA90544BLK
SUPERSPROX
MSRP: $49.95Now: $42.46Was: $49.95A lightweight rear sprocket is one of the most cost-effective upgrades for improving acceleration and reducing unsprung weight on mid-range bikes. The SUPERSPROX Edge reduces rotational mass by 5–15%, translating to sharper throttle response and faster...12102399- SKU:
- 12102399
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- MODEL:
- EDGE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 44
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- ZINC
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- LIGHTWEIGHT
MSRP: $49.95Now: $42.46Was: $49.95 -
On Sale
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-1590-13-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95Countershaft sprocket failures cost you races and rebuild time. The SUPERSPROX 13-tooth countershaft sprocket eliminates that risk with factory-grade engineering designed for professional racing teams—delivering the same durability and precision you need...12121343- SKU:
- 12121343
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 520
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 13
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
MSRP: $24.95Now: $21.21Was: $24.95 -
On Sale
SUPERSPROX Countershaft Sprocket - 17-Tooth CST-1902-17-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95Countershaft sprockets are the foundation of reliable power transfer in high-RPM applications—a weak link here means lost performance and costly downtime. The SUPERSPROX CST-1902-17-1 is engineered with the same material science and precision as...12121350- SKU:
- 12121350
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- TOOTH COUNT:
- 17
- TYPE:
- COUNTERSHAFT
MSRP: $24.95Now: $21.21Was: $24.95Qty in Cart: 0Quantity:Price:MSRP: $24.95Now: $21.21Was: $24.95Subtotal: -
On Sale
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-250-13-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95A countershaft sprocket is your direct connection between engine power and wheel acceleration—choose inferior materials and you're gambling with reliability under load. The SUPERSPROX CST-250-13-1 uses SCM-435 carbon-free steel with a hardened surface...12121352- SKU:
- 12121352
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MATERIAL:
- STEEL
- TOOTH COUNT:
- 13
MSRP: $24.95Now: $21.21Was: $24.95 -
On Sale
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-284-13-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95A worn or undersized countershaft sprocket kills acceleration and forces your chain to work harder than it should, draining power before it reaches the rear wheel. The SUPERSPROX 13-Tooth Countershaft Sprocket delivers the precision engineering and...12121356- SKU:
- 12121356
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- STEEL
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
MSRP: $24.95Now: $21.21Was: $24.95Qty in Cart: 0Quantity:Price:MSRP: $24.95Now: $21.21Was: $24.95Subtotal: -
On Sale
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-565-13-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95A countershaft sprocket is your direct connection to reliable power delivery, and this SUPERSPROX 13-tooth unit delivers the durability and precision that factory racing teams demand. Built from SCM-435 carbon-free steel with an ultra-hard surface layer,...12121388- SKU:
- 12121388
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 520
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- TOOTH COUNT:
- 13
- UNITS:
- EACH
MSRP: $24.95Now: $21.21Was: $24.95 -
On Sale
SUPERSPROX Countershaft Sprocket - 14-Tooth CST-565-14-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95A worn or inadequate countershaft sprocket will rob your engine of power before it ever reaches the chain—and on high-revving applications, chain slap and premature wear become expensive problems. The SUPERSPROX CST-565-14-1 is engineered with the same...12121389- SKU:
- 12121389
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- CHAIN SIZE:
- 520
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- TYPE:
- COUNTERSHAFT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 14
MSRP: $24.95Now: $21.21Was: $24.95 -
On Sale
SUPERSPROX Countershaft Sprocket - 15-Tooth CST-565-15-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95Chain drag and power loss plague riders pushing their machines to the limit—especially on technical terrain where every watt counts. The SUPERSPROX Countershaft Sprocket delivers factory-spec reliability with a hardened surface layer that cuts friction...12121390- SKU:
- 12121390
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- TOOTH COUNT:
- 15
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
MSRP: $24.95Now: $21.21Was: $24.95 -
On Sale
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-569-13-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95A countershaft sprocket is the direct link between your engine's power and your chain drive—so it needs to survive extreme loads without flex or wear. The SUPERSPROX 13-tooth countershaft sprocket delivers the durability of factory racing parts with a...12121391- SKU:
- 12121391
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- STEEL
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
MSRP: $24.95Now: $21.21Was: $24.95Qty in Cart: 0Quantity:Price:MSRP: $24.95Now: $21.21Was: $24.95Subtotal: -
On Sale
SUPERSPROX Countershaft Sprocket - 14-Tooth CST-569-14-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95A countershaft sprocket is your direct link to reliable power delivery—and a weak one costs you lap time and durability. The SUPERSPROX 14-tooth countershaft sprocket delivers the precision engineering of real factory racing teams, engineered to handle...12121392- SKU:
- 12121392
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- TOOTH COUNT:
- 14
- CHAIN SIZE:
- 520
- MATERIAL:
- STEEL
- UNITS:
- EACH
MSRP: $24.95Now: $21.21Was: $24.95Qty in Cart: 0Quantity:Price:MSRP: $24.95Now: $21.21Was: $24.95Subtotal: -
On Sale
SUPERSPROX Countershaft Sprocket - 15-Tooth CST-569-15-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95A countershaft sprocket that fails mid-race costs you more than money—it costs you position. The SUPERSPROX CST-569-15-1 is engineered with SCM-435 carbon-free steel and an ultra-hard surface layer to eliminate premature wear and chain drag that bleeds...12121393- SKU:
- 12121393
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- MATERIAL:
- STEEL
- CHAIN SIZE:
- 520
- TOOTH COUNT:
- 15
MSRP: $24.95Now: $21.21Was: $24.95Qty in Cart: 0Quantity:Price:MSRP: $24.95Now: $21.21Was: $24.95Subtotal: -
On Sale
SUPERSPROX Countershaft Sprocket - 14-Tooth CST-250-14-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95A countershaft sprocket is your direct mechanical link to engine power—wear it down with inferior steel, and you're losing efficiency with every shift. The SUPERSPROX 14-Tooth CST-250-14-1 uses SCM-435 carbon-free steel with a hardened surface layer that...12121425- SKU:
- 12121425
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TOOTH COUNT:
- 14
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
MSRP: $24.95Now: $21.21Was: $24.95 -
On Sale
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-430-13-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95A countershaft sprocket failure mid-race costs you time and money—this SUPERSPROX 13-tooth sprocket eliminates that risk with SCM-435 carbon-free steel engineered for zero breaking. The ultra-hard surface layer cuts friction and chain drag, translating...12121427- SKU:
- 12121427
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- STEEL
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
MSRP: $24.95Now: $21.21Was: $24.95Qty in Cart: 0Quantity:Price:MSRP: $24.95Now: $21.21Was: $24.95Subtotal: -
On Sale
SUPERSPROX Countershaft Sprocket - 14-Tooth CST-824-14-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95If you're pushing your machine hard on dirt or asphalt, sprocket failure isn't just an inconvenience—it's a DNF. The SUPERSPROX Countershaft Sprocket delivers factory team-grade durability and efficiency, engineered to handle the abuse that lesser...12121405- SKU:
- 12121405
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- CHAIN SIZE:
- 520
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 14
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
MSRP: $24.95Now: $21.21Was: $24.95 -
On Sale
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-827-13-1
SUPERSPROX
MSRP: $34.95Now: $29.71Was: $34.95A countershaft sprocket is only as good as its ability to handle sustained power transfer without degradation. The SUPERSPROX CST-827-13-1 is engineered with SCM-435 carbon-free steel and an ultra-hard surface layer to eliminate chain drag losses while...12121406- SKU:
- 12121406
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
MSRP: $34.95Now: $29.71Was: $34.95Qty in Cart: 0Quantity:Price:MSRP: $34.95Now: $29.71Was: $34.95Subtotal: -
On Sale
SUPERSPROX Steel Rear Sprocket - 44-Tooth RFE-808-44-BLK
SUPERSPROX
MSRP: $49.95Now: $42.46Was: $49.95A rear sprocket is fundamental to your drivetrain's efficiency and longevity. The SUPERSPROX 44-tooth steel sprocket delivers race-proven durability with measurable gains in chain wear reduction and power delivery consistency, whether you're pushing hard...12101919- SKU:
- 12101919
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- TOOTH COUNT:
- 44
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
MSRP: $49.95Now: $42.46Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.46Was: $49.95Subtotal: -
On Sale
SUPERSPROX Steel Rear Sprocket - 47-Tooth RFE-808-47-BLK
SUPERSPROX
MSRP: $49.95Now: $42.46Was: $49.95A quality rear sprocket directly impacts your chain drive efficiency, acceleration response, and overall drivetrain longevity. The SUPERSPROX 47-Tooth Steel Rear Sprocket delivers race-proven durability without sacrificing weight, making it an ideal...12101920- SKU:
- 12101920
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
MSRP: $49.95Now: $42.46Was: $49.95 -
On Sale
SUPERSPROX Steel Rear Sprocket - 50-Tooth RFE-808-50-BLK
SUPERSPROX
MSRP: $49.95Now: $42.46Was: $49.95A rear sprocket directly impacts your power delivery, acceleration, and overall drivetrain efficiency—making it one of the most critical components you can upgrade. The SUPERSPROX Steel Rear Sprocket delivers race-proven durability without the weight...12101923- SKU:
- 12101923
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- UNITS:
- EACH
MSRP: $49.95Now: $42.46Was: $49.95
