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
-
PROX Inner Clutch Hub 18.4392
PROX
$77.95A worn or damaged clutch hub directly compromises your primary clutch's engagement and response characteristics, robbing you of consistent power delivery on the track or trail. The PROX Inner Clutch Hub 18.4392 restores OEM-spec performance with...11320070- SKU:
- 11320070
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CLUTCH HUB
- TYPE:
- INNER
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$77.95 -
PROX Inner Clutch Hub 18.4334
PROX
$71.95The PROX Inner Clutch Hub 18.4334 is your direct replacement for worn or damaged OEM clutch components, restoring precise engagement characteristics and reliable power transfer. Manufactured to OEM specifications using precision-cast aluminum, this hub...11320071- SKU:
- 11320071
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- PRODUCT NAME:
- CLUTCH HUB
- TYPE:
- INNER
- RIDING STYLE:
- OFF-ROAD
$71.95 -
PROX Inner Clutch Hub 18.4408
PROX
$95.95The PROX Inner Clutch Hub 18.4408 is a precision-cast aluminum replacement hub engineered to OEM specifications, ensuring reliability and consistent engagement across both stock and high-performance primary clutch baskets. Whether you're rebuilding a...11320072- SKU:
- 11320072
- Availability:
- Ships Same Business Day
- Weight:
- 1.24 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- INNER
- PRODUCT NAME:
- CLUTCH HUB
- UNITS:
- EACH
$95.95Qty in Cart: 0Quantity:Price:$95.95Subtotal: -
PROX Inner Clutch Hub 18.3299
PROX
$71.95The PROX Inner Clutch Hub 18.3299 is engineered as a direct OEM replacement, ensuring your primary clutch operates at factory specifications without compromise. Whether you're running stock or upgraded clutch baskets, this precision-cast hub maintains...11320073- SKU:
- 11320073
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CLUTCH HUB
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- INNER
$71.95 -
PROX Inner Clutch Hub - RM-Z250 18.3337
PROX
$77.95The clutch hub is the mechanical heart of your primary clutch system, and wear or damage here directly compromises engagement precision and power delivery. A failing hub forces sloppy shifts, inconsistent throttle response, and accelerated wear on your...11320516- SKU:
- 11320516
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- PRODUCT NAME:
- CLUTCH HUB
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- INNER
$77.95 -
PROX Inner Clutch Hub - CRF250R 18.1340
PROX
$93.95The clutch hub is the critical interface between your primary drive system and engine power delivery. A worn or damaged hub creates slippage, inconsistent engagement, and compromised acceleration—exactly what kills lap times and reliability. The PROX...11320654- SKU:
- 11320654
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CLUTCH HUB
- TYPE:
- INNER
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$93.95 -
PROX Inner Clutch Hub - CRF450R 18.1409
PROX
$79.95The PROX Inner Clutch Hub is engineered to restore full clutch engagement and reliability in your CRF450R. Whether you're dealing with wear from track use or rebuilding your clutch system, this OEM-specification replacement ensures consistent power...11320655- SKU:
- 11320655
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- CLUTCH HUB
- TYPE:
- INNER
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal: -
On Sale
PROX Inner Clutch Hub 18.1290
PROX
MSRP: $66.95Now: $55.00Was: $66.95The PROX Inner Clutch Hub 18.1290 is a precision-engineered replacement component manufactured to exact OEM specifications, ensuring reliable power transfer and consistent clutch engagement. Whether you're running a stock setup or a modified primary...11320059- SKU:
- 11320059
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CLUTCH HUB
- TYPE:
- INNER
- UNITS:
- EACH
MSRP: $66.95Now: $55.00Was: $66.95 -
On Sale
PROX Inner Clutch Hub 18.1397
PROX
MSRP: $82.95Now: $68.00Was: $82.95A worn or damaged clutch hub can compromise your primary clutch engagement and throttle response—critical factors whether you're on the track or the trail. The PROX Inner Clutch Hub 18.1397 delivers OEM-level precision and durability, engineered to...11320061- SKU:
- 11320061
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- TYPE:
- INNER
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CLUTCH HUB
MSRP: $82.95Now: $68.00Was: $82.95 -
SUPERSPROX Steel Rear Sprocket - 53-Tooth RFE-210-53-BLK
SUPERSPROX
$69.95A high-performance rear sprocket needs to deliver durability under sustained load while maintaining precise engagement with your chain. The SUPERSPROX 53-Tooth Steel Rear Sprocket combines race-proven geometry with lightweight construction, making it...12101890- SKU:
- 12101890
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 53
- TYPE:
- REAR
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
$69.95 -
SUPERSPROX Steel Rear Sprocket - 42-Tooth RFE-460-42-BLK
SUPERSPROX
$44.95If you're running a chain drive system that demands reliability under sustained load, sprocket wear is your silent performance killer. The SUPERSPROX 42-tooth rear sprocket delivers race-proven durability with a lightweight steel construction that...12101901- SKU:
- 12101901
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 42
- TYPE:
- REAR
- MOUNTING POSITION:
- REAR
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
$44.95Qty in Cart: 0Quantity:Price:$44.95Subtotal: -
SUPERSPROX Steel Rear Sprocket - 48-Tooth RFE-460-48-BLK
SUPERSPROX
$54.95A rear sprocket is one of the most critical drivetrain components for acceleration, top speed, and overall power delivery—and choosing the right one directly impacts your bike's performance and longevity. The SUPERSPROX 48-tooth steel sprocket delivers...12101902- SKU:
- 12101902
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- MOUNTING POSITION:
- REAR
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
$54.95Qty in Cart: 0Quantity:Price:$54.95Subtotal: -
SUPERSPROX Steel Rear Sprocket - 48-Tooth RFE-1512-48-BLK
SUPERSPROX
$54.95A worn or inefficient rear sprocket directly impacts your drivetrain's responsiveness and longevity. The SUPERSPROX 48-tooth steel sprocket delivers race-proven durability with a precision-engineered design that reduces wear across your entire chain and...12102157- SKU:
- 12102157
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- REAR
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
$54.95Qty in Cart: 0Quantity:Price:$54.95Subtotal: -
SUPERSPROX Edge Rear Sprocket Insert - Red RACD130642RED
SUPERSPROX
$10.95Traditional stamped steel sprockets flex under load, robbing you of precise power delivery and longevity. The SUPERSPROX Edge Rear Sprocket Insert delivers the rigidity and durability of a premium billet design without a full sprocket replacement—a...12102336- SKU:
- 12102336
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- RED
- TYPE:
- EDGE REAR
- UNITS:
- EACH
- PRODUCT NAME:
- INSERT
- RIDING STYLE:
- STREET
$10.95 -
SUPERSPROX Edge Rear Sprocket Insert - Gold RACD130746GLD
SUPERSPROX
$9.95A worn or damaged rear sprocket insert compromises your bike's acceleration, chain engagement, and overall drivetrain efficiency. The SUPERSPROX Edge Rear Sprocket Insert delivers precision-engineered durability in a gold finish, replacing traditional...12102338- SKU:
- 12102338
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- GOLD
- PRODUCT NAME:
- INSERT
- TYPE:
- EDGE REAR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$9.95 -
SUPERSPROX Edge Rear Sprocket Insert - Blue RACD179242BLU
SUPERSPROX
$9.95A quality rear sprocket directly impacts acceleration, top speed, and overall drivetrain efficiency—making sprocket selection critical for racers and performance enthusiasts. Traditional stamped steel sprockets flex under load and wear unevenly,...12102339- SKU:
- 12102339
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLUE
- PRODUCT NAME:
- INSERT
- TYPE:
- EDGE REAR
$9.95 -
SUPERSPROX Edge Rear Sprocket Insert - Gold RACD179242GLD
SUPERSPROX
$9.95Traditional stamped steel sprockets introduce inconsistencies in tooth profile and durability that compromise acceleration and chain longevity—especially under sustained racing conditions. The SUPERSPROX Edge Rear Sprocket Insert upgrades you to...12102340- SKU:
- 12102340
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- GOLD
- PRODUCT NAME:
- INSERT
- TYPE:
- EDGE REAR
$9.95 -
SUPERSPROX Edge Rear Sprocket Insert - Blue RACD179243BLU
SUPERSPROX
$9.95A worn or damaged rear sprocket compromises your chain drive efficiency and can introduce unwanted vibration throughout your drivetrain. The SUPERSPROX Edge Rear Sprocket Insert replaces traditional stamped steel designs with a precision-engineered...12102341- SKU:
- 12102341
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- BLUE
- UNITS:
- EACH
- PRODUCT NAME:
- INSERT
- TYPE:
- EDGE REAR
- RIDING STYLE:
- STREET
$9.95 -
SUPERSPROX Edge Rear Sprocket Insert - Gold RACD179243GLD
SUPERSPROX
$9.95Stamped steel sprockets introduce inconsistencies in tooth engagement and accelerate wear under high-load racing conditions. The SUPERSPROX Edge Rear Sprocket Insert upgrades your drivetrain with precision-machined construction that delivers consistent...12102342- SKU:
- 12102342
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- GOLD
- PRODUCT NAME:
- INSERT
- TYPE:
- EDGE REAR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$9.95 -
SUPERSPROX Edge Rear Sprocket Insert - Blue RACD179245BLU
SUPERSPROX
$9.95Traditional stamped steel sprockets flex under load, compromising chain engagement and acceleration response. SUPERSPROX Edge rear sprocket inserts replace worn or damaged inserts with precision-engineered construction, restoring your sprocket's...12102343- SKU:
- 12102343
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- INSERT
- TYPE:
- EDGE REAR
- UNITS:
- EACH
- COLOR/FINISH:
- BLUE
$9.95
