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
-
Renthal 48-Tooth Black Aluminum Rear Sprocket for Yamaha 150U-520-48GBBK
RENTHAL
$99.82If you're running a 520 chain on your Yamaha and want measurable gains in acceleration without adding rotational mass, this Renthal sprocket is a direct upgrade. The 7075-T6 aluminum construction sheds approximately 66% of the weight you'd carry with a...12110025- SKU:
- 12110025
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
$99.82 -
Renthal 50-Tooth Black Rear Sprocket 150U-520-50GBBK
RENTHAL
$99.82A lightweight rear sprocket is one of the most direct upgrades you can make to improve acceleration and throttle response on your dirt bike or off-road machine. The Renthal 50-Tooth Rear Sprocket combines 7075-T6 aluminum construction with self-cleaning...12110027- SKU:
- 12110027
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- REAR
$99.82 -
Renthal 49-Tooth Rear Sprocket for Honda 154U-520-49GRBK
RENTHAL
$99.82Reducing unsprung weight is one of the most direct ways to improve acceleration, braking response, and handling dynamics on your Honda. The Renthal 49-Tooth Rear Sprocket replaces heavy steel with aerospace-grade 7075-T6 aluminum—cutting weight by 66%...12110031- SKU:
- 12110031
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$99.82 -
Renthal Ultralight Rear Sprocket 51T Black 520 Chain 154U-520-51GRBK
RENTHAL
$99.82Reducing rotational mass is one of the most effective ways to improve acceleration and throttle response on a motorcycle. The Renthal Ultralight Rear Sprocket cuts weight by approximately 66% compared to steel alternatives, while its 7075-T6 aluminum...12110033- SKU:
- 12110033
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- TOOTH COUNT:
- 51
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TYPE:
- DRIVE
$99.82 -
Renthal 46T Rear Sprocket for KTM 85 SX 17/14 2004-2017 441U-428-46GPSI
RENTHAL
$99.82If you're running a KTM 85 SX hard in the dirt, sprocket choice directly impacts your power delivery and handling. This Renthal 46-tooth sprocket trades unnecessary weight for durability without compromise—reducing unsprung mass improves acceleration and...12110088- SKU:
- 12110088
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 46
- UNITS:
- EACH
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
$99.82 -
Renthal Ultralight Rear Sprocket 48T 428 Chain KTM 85 SX 441U-428-48GPSI
RENTHAL
$99.82If you're running a KTM 85 SX and want measurable gains in acceleration without adding rotational mass, the Renthal Ultralight Rear Sprocket delivers. At 66% lighter than steel, this CNC-machined 7075-T6 aluminum sprocket improves throttle response and...12110090- SKU:
- 12110090
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 428
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
$99.82 -
Renthal Ultralight Rear Sprocket 49T 428 Chain Silver 441U-428-49GPSI
RENTHAL
$99.82If you're running a KTM 85 SX or 105 SX, sprocket wear directly impacts acceleration, top-end speed, and overall drivetrain efficiency. The Renthal Ultralight 49T rear sprocket cuts unsprung weight by 66% compared to steel equivalents, sharpening your...12110091- SKU:
- 12110091
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- CHAIN SIZE:
- 428
- UNITS:
- EACH
$99.82 -
Renthal Red 49-Tooth Rear Sprocket for Honda 154U-520-49GRRD
RENTHAL
$104.61If you're running a 520 chain setup on your Honda, sprocket weight directly impacts your bike's acceleration and overall responsiveness—and this Renthal aluminum sprocket cuts weight by 66% compared to steel while maintaining the durability needed for...12110160- SKU:
- 12110160
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RED
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$104.61 -
Renthal 51-Tooth Red Rear Sprocket for Honda 154U-520-51GRRD
RENTHAL
$104.61A lightweight rear sprocket directly impacts your Honda's acceleration, handling, and drivetrain efficiency. By switching to Renthal's 7075-T6 aluminum design, you'll reduce unsprung weight while gaining durability that outperforms traditional...12110162- SKU:
- 12110162
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RED
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
$104.61 -
Renthal 48-Tooth Rear Sprocket for Yamaha WR and YZ Models 150U-520-48GBBU
RENTHAL
$104.61If you're running a Yamaha WR or YZ and want measurable gains in acceleration and handling without adding weight, upgrading to a lightweight aluminum sprocket is one of the highest-return modifications you can make. The Renthal 48-tooth rear sprocket...12110164- SKU:
- 12110164
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
$104.61 -
Renthal Blue 50-Tooth Rear Sprocket for Yamaha 150U-520-50GBBU
RENTHAL
$104.61Lightweight performance and durability are critical when you're pushing your Yamaha to its limits on the track or trail. The Renthal Blue 50-Tooth Rear Sprocket cuts rotational mass by approximately 66% compared to steel alternatives, translating...12110166- SKU:
- 12110166
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
$104.61 -
Renthal TwinRing Rear Sprocket 50T Black 1120-520-50GPBK
RENTHAL
$142.50If you're running a 50-tooth rear sprocket on your dirt bike, you need a component that can handle both the demands of aggressive riding and the punishment of off-road terrain. The Renthal TwinRing combines a lightweight aluminum core with a hardened...12100805- SKU:
- 12100805
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
$142.50 -
Renthal TwinRing Rear Sprocket 49T 520 Chain Black 1230-520-49GPBK
RENTHAL
$142.50The Renthal TwinRing Rear Sprocket delivers the durability and lightweight performance that serious off-road riders demand. By combining a high-strength aluminum core with a steel outer ring, this sprocket outlasts standard all-aluminum alternatives by...12100807- SKU:
- 12100807
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
$142.50 -
Renthal TwinRing Rear Sprocket 49T Black 520 Chain 1500-520-49GPBK
RENTHAL
$142.50If you're running a 520 chain on your dirt bike, sprocket wear directly impacts throttle response, acceleration, and chain longevity. The Renthal TwinRing 49T combines a lightweight 7075 T-6 aluminum core with a nickel-coated steel outer ring—delivering...12100809- SKU:
- 12100809
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
$142.50 -
Renthal Twinring Rear Sprocket 48T Black 2240-520-48GPBK
RENTHAL
$142.50If you're running a 520 chain setup and want a rear sprocket that actually lasts, the Renthal Twinring 48T delivers the durability and weight savings that separate reliable performance from constant replacement cycles. The dual-material construction—7075...12100815- SKU:
- 12100815
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
$142.50 -
Renthal Twinring Rear Sprocket 50T Black 2240-520-50GPBK
RENTHAL
$142.50Rear sprocket selection directly impacts your bike's acceleration, top speed, and chain longevity—making durability and weight critical factors in performance. The Renthal Twinring 50T combines a lightweight 7075 T-6 aluminum core with a hardened steel...12100816- SKU:
- 12100816
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$142.50Qty in Cart: 0Quantity:Price:$142.50Subtotal: -
Renthal TwinRing 49-Tooth Rear Sprocket Blue 1500-520-49GPBU
RENTHAL
$149.98Sprocket wear directly impacts chain life and power delivery—a worn or poorly designed sprocket forces your chain to work harder and fail faster. The Renthal TwinRing 49-Tooth Rear Sprocket eliminates this problem with a hybrid aluminum-steel...12100818- SKU:
- 12100818
- Availability:
- Ships Same Business Day
- Weight:
- 1.76 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- COLOR/FINISH:
- BLUE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
$149.98 -
Renthal Twinring Rear Sprocket 49T Red 520 Chain 1540-520-49GPRD
RENTHAL
$149.98If you're running a 520 chain setup and want a rear sprocket that can actually survive the punishment of off-road riding, the Renthal Twinring 49T is built for longevity. The hybrid aluminum-and-steel construction delivers three times the lifespan of...12100821- SKU:
- 12100821
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RED
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
$149.98 -
Renthal TwinRing Rear Sprocket 50T Red 520 Chain 1540-520-50GPRD
RENTHAL
$149.98The Renthal TwinRing Rear Sprocket delivers the lightweight performance and durability demanded by serious riders who refuse to compromise on either metric. Its hybrid construction—pairing a high-strength 7075 T-6 aluminum inner ring with an electro-less...12100822- SKU:
- 12100822
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RED
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
$149.98Qty in Cart: 0Quantity:Price:$149.98Subtotal: -
Renthal Twinring Rear Sprocket 48T Orange 2240-520-48GPOR
RENTHAL
$149.98If you're running a 520 chain setup and demand sprocket reliability without excess rotational weight, the Renthal Twinring 48T delivers proven durability in a package that outperforms traditional all-aluminum designs by a significant margin. The...12100983- SKU:
- 12100983
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- COLOR/FINISH:
- ORANGE
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$149.98
