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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On Sale
Renthal 50-Tooth Rear Sprocket for Yamaha 150U-520-50GBSI
RENTHAL
MSRP: $99.82Now: $89.84Was: $99.82If you're running a 50-tooth rear sprocket, you're optimizing for top-end acceleration and handling—and the RENTHAL 150U-520-50GBSI delivers exactly that without the weight penalty of steel. Built...R150A52050- SKU:
- R150A52050
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- DRIVE
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
MSRP: $99.82Now: $89.84Was: $99.82Qty in Cart: 0Quantity:Price:MSRP: $99.82Now: $89.84Was: $99.82Subtotal: -
On Sale
Renthal 520 R1 Works Chain 116 Links Gold C126
RENTHAL
MSRP: $141.38Now: $127.24Was: $141.38If you're serious about off-road racing, your chain needs to match your commitment. The Renthal 520 R1 Works is built with shot-peened alloy steel and chromized pins to handle the punishment of...R1520116- SKU:
- R1520116
- Availability:
- Ships Same Business Day
- Weight:
- 4.10 LBS
- CHAIN TYPE:
- 520 R1
- MODEL:
- R1
- RIDING STYLE:
- UTV
- CHAIN SIZE:
- 520
- MAXIMUM ENGINE DISPLACEMENT (OFFROAD):
- 450 CC
- NUMBER OF LINKS:
- 116
- PRODUCT NAME:
- DRIVE CHAIN
- TENSILE STRENGTH METRIC:
- 34 KN
- COLOR/FINISH:
- GOLD
- MASTER LINK CONNECTOR:
- CLIP
- SEAL TYPE:
- NON-SEAL
- TENSILE STRENGTH IMPERIAL:
- 7644 LB
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $141.38Now: $127.24Was: $141.38 -
On Sale
Renthal Front Sprocket 14T 520 Chain Honda CR250R CR500R CRF450R 253--520-14GP
RENTHAL
MSRP: $37.95Now: $34.16Was: $37.95A lightweight front sprocket is one of the most effective upgrades for improving throttle response and acceleration on your Honda CR-series or CRF450R. The Renthal 14T reduces unsprung weight at the...R25352014- SKU:
- R25352014
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- TOOTH COUNT:
- 14
MSRP: $37.95Now: $34.16Was: $37.95 -
On Sale
Renthal 13-Tooth Front Sprocket for Yamaha YZ125 1987-2004 WR200R 1992 257--520-13GP
RENTHAL
MSRP: $37.95Now: $34.16Was: $37.95A worn or incorrect front sprocket robs your YZ or WR of acceleration and increases drivetrain stress—the Renthal 13-tooth addresses both issues with case-hardened durability and measurable weight...R25752013- SKU:
- R25752013
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- SPROCKET
- TYPE:
- COUNTERSHAFT
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 13
- UNITS:
- EACH
MSRP: $37.95Now: $34.16Was: $37.95 -
On Sale
Renthal 15-Tooth Grooved Front Sprocket for Honda 259--420-15GP
RENTHAL
MSRP: $37.34Now: $33.61Was: $37.34If you're running a Honda 420 chain setup, sprocket selection directly impacts your acceleration, chain wear, and overall drivetrain longevity. The Renthal 15-Tooth Grooved Front Sprocket cuts 10-15%...R25942015- SKU:
- R25942015
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 420
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 15
- TYPE:
- COUNTERSHAFT
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
MSRP: $37.34Now: $33.61Was: $37.34Qty in Cart: 0Quantity:Price:MSRP: $37.34Now: $33.61Was: $37.34Subtotal: -
On Sale
Renthal 14-Tooth Front Sprocket for Kawasaki KX250 KLX300R 520 Chain 289--520-14GP
RENTHAL
MSRP: $37.95Now: $34.16Was: $37.95A worn or undersized front sprocket kills acceleration and leaves performance on the table. The Renthal 14-tooth front sprocket delivers the durability and light weight serious riders demand, whether...R28952014- SKU:
- R28952014
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- STREET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 14
MSRP: $37.95Now: $34.16Was: $37.95 -
On Sale
Renthal 14-Tooth Ultralight Front Sprocket 289U-520-14GP
RENTHAL
MSRP: $47.95Now: $43.16Was: $47.95Shaving rotating mass from your countershaft delivers measurable gains in acceleration and throttle response—especially critical for competitive riding where every tenth counts. The Renthal 14-Tooth...R289U52014- SKU:
- R289U52014
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 14
MSRP: $47.95Now: $43.16Was: $47.95 -
On Sale
Renthal 49-Tooth Rear Sprocket for Honda CR125R CR250R CR500R CRF250R CRF450R 154U-520-49GRSI
RENTHAL
MSRP: $99.82Now: $89.84Was: $99.82Shave nearly a pound off your Honda dirt bike while gaining measurable improvements in acceleration and handling. The Renthal 49-tooth rear sprocket delivers the weight reduction serious racers...R15449- SKU:
- R15449
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- CHAIN SIZE:
- 520
- TYPE:
- DRIVE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
MSRP: $99.82Now: $89.84Was: $99.82 -
On Sale
Renthal 51-Tooth Ultralight Rear Sprocket for KTM 224U-520-51GPSI
RENTHAL
MSRP: $99.82Now: $89.84Was: $99.82If you're running a 51-tooth rear sprocket, you're prioritizing top-end speed and efficiency on your KTM—but a steel sprocket will cost you performance through added rotational mass. The Renthal...R22451- SKU:
- R22451
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- DRIVE
MSRP: $99.82Now: $89.84Was: $99.82 -
On Sale
Renthal 13-Tooth Front Sprocket for Kawasaki and Yamaha 252--520-13GP
RENTHAL
MSRP: $37.95Now: $34.16Was: $37.95Chain wear starts at the sprocket, and a worn front sprocket tanks your acceleration and handling before you notice it. The Renthal 13-Tooth Front Sprocket combines case-hardened steel durability...R25252013- SKU:
- R25252013
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
MSRP: $37.95Now: $34.16Was: $37.95 -
On Sale
Renthal 14-Tooth Front Sprocket for Kawasaki and Yamaha 520 Chain 252--520-14GP
RENTHAL
MSRP: $37.95Now: $34.16Was: $37.95If you're running a 520 chain on your Kawasaki or Yamaha, a worn front sprocket directly impacts throttle response, chain wear, and overall drivetrain reliability. The Renthal 14-Tooth Front Sprocket...R25252014- SKU:
- R25252014
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 14
- TYPE:
- COUNTERSHAFT
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- ATV
- UNITS:
- EACH
MSRP: $37.95Now: $34.16Was: $37.95 -
On Sale
Renthal 13-Tooth Front Sprocket for Suzuki RM125 RM-Z250 254--520-13GP
RENTHAL
MSRP: $37.95Now: $34.16Was: $37.95A worn or undersized front sprocket directly impacts your Suzuki's acceleration, chain wear, and overall drivetrain efficiency. The Renthal 13-tooth sprocket delivers the durability and weight...R25452013- SKU:
- R25452013
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- TOOTH COUNT:
- 13
- UNITS:
- EACH
MSRP: $37.95Now: $34.16Was: $37.95 -
On Sale
Renthal 13-Tooth Front Sprocket for Suzuki 255-520-13GP
RENTHAL
MSRP: $37.95Now: $34.16Was: $37.95If you're running a 13-tooth front sprocket on your Suzuki, material and design matter—especially when you're pushing hard in mud, sand, or rocky terrain. The Renthal 255-520-13GP cuts weight while...R25552013- SKU:
- R25552013
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- CHAIN SIZE:
- 520
MSRP: $37.95Now: $34.16Was: $37.95 -
On Sale
Renthal 13-Tooth Front Sprocket for Honda 256--520-13GP
RENTHAL
MSRP: $37.95Now: $34.16Was: $37.95A lightweight front sprocket is one of the most direct ways to improve acceleration and throttle response on your Honda—and the Renthal 13-tooth delivers exactly that. By shaving 10-15% off rotating...R25652013- SKU:
- R25652013
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
MSRP: $37.95Now: $34.16Was: $37.95Qty in Cart: 0Quantity:Price:MSRP: $37.95Now: $34.16Was: $37.95Subtotal: -
On Sale
Renthal Front Sprocket 13-Tooth 520 Chain Kawasaki Yamaha 289--520-13GP
RENTHAL
MSRP: $37.95Now: $34.16Was: $37.95A lightweight front sprocket is one of the quickest ways to sharpen your motorcycle's throttle response and reduce unsprung weight—both critical factors in acceleration and handling. The Renthal...R28952013- SKU:
- R28952013
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- ATV
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
MSRP: $37.95Now: $34.16Was: $37.95 -
On Sale
Renthal 13-Tooth Front Sprocket for Kawasaki KX125 1992-2005 337--520-13GP
RENTHAL
MSRP: $37.95Now: $34.16Was: $37.95A lightweight front sprocket is one of the most cost-effective upgrades for improving your KX125's acceleration and throttle response. The Renthal 13-tooth sprocket combines precision engineering...R33752013- SKU:
- R33752013
- Availability:
- Ships Same Business Day
- Weight:
- 1.88 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- CHAIN SIZE:
- 520
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 13
- UNITS:
- EACH
MSRP: $37.95Now: $34.16Was: $37.95 -
On Sale
Renthal 48-Tooth Rear Sprocket for Kawasaki 112U-520-48GEBK
RENTHAL
MSRP: $104.95Now: $94.46Was: $104.95If you're running a 520 chain on your Kawasaki, this 48-tooth rear sprocket is a direct bolt-on upgrade that cuts rotational mass significantly—translating to quicker acceleration and more responsive...12110015- SKU:
- 12110015
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
MSRP: $104.95Now: $94.46Was: $104.95 -
On Sale
Renthal 50-Tooth Rear Sprocket for Kawasaki 112U-520-50GEBK
RENTHAL
MSRP: $104.95Now: $94.46Was: $104.95Shaving nearly two-thirds of the weight from your rear sprocket directly translates to quicker acceleration and more responsive handling—especially critical when you're pushing hard in competitive or...12110017- SKU:
- 12110017
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
MSRP: $104.95Now: $94.46Was: $104.95 -
On Sale
Renthal Ultralight Rear Sprocket 51T Black 112U-520-51GEBK
RENTHAL
MSRP: $104.95Now: $94.46Was: $104.95Reducing unsprung weight is one of the most effective ways to improve acceleration and handling dynamics on a sportbike or dirt bike. The Renthal Ultralight Rear Sprocket replaces heavy steel with...12110018- SKU:
- 12110018
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 51
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TYPE:
- DRIVE
MSRP: $104.95Now: $94.46Was: $104.95 -
On Sale
Renthal 48T Ultralight Rear Sprocket for Suzuki Black 123U-520-48GYBK
RENTHAL
MSRP: $104.95Now: $94.46Was: $104.95Rotational mass directly impacts acceleration and throttle response—every gram counts in competitive riding and aggressive trail work. The Renthal 48T Ultralight Rear Sprocket cuts weight by 66%...12110020- SKU:
- 12110020
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
MSRP: $104.95Now: $94.46Was: $104.95
