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 12-Tooth Front Sprocket for Honda CR125R 1987-2003 256-520-12GP
RENTHAL
$37.95If you're running a Honda CR125R, sprocket selection directly impacts your power delivery and clutch engagement. The Renthal 12-Tooth Front Sprocket reduces unsprung weight while maintaining the durability required for consistent race performance—every...R25652012- SKU:
- R25652012
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 12
$37.95 -
Renthal Front Sprocket 14T 428 Chain Yamaha YZ85 2002-2026 257--428-14GP
RENTHAL
$37.95If you're running a 14-tooth countershaft sprocket on your YZ85, gear selection directly impacts acceleration, top-end speed, and overall drivetrain efficiency. The Renthal 14T Front Sprocket delivers measurable weight savings and proven durability...R25742814- SKU:
- R25742814
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 14
- CHAIN SIZE:
- 428
$37.95 -
Renthal Front Sprocket 12T 520 Chain Yamaha YZ125 WR200R 257--520-12GP
RENTHAL
$37.95A worn or undersized front sprocket limits acceleration and forces your engine to work harder, bleeding performance when you need it most. The Renthal 12T Front Sprocket delivers the durability and lightweight efficiency that separates competitive...R25752012- SKU:
- R25752012
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- CHAIN SIZE:
- 520
- MATERIAL:
- 655M13 NICKEL CHROMIUM STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 12
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
$37.95Qty in Cart: 0Quantity:Price:$37.95Subtotal: -
Renthal 13-Tooth Front Sprocket 420 Chain for Kawasaki KX Models 258--420-13GP
RENTHAL
$37.95A lighter front sprocket translates directly to quicker acceleration and sharper throttle response—critical advantages whether you're launching on the track or navigating technical terrain. The Renthal 13-tooth design pairs aggressive power delivery with...R25842013- SKU:
- R25842013
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- CHAIN SIZE:
- 420
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$37.95Qty in Cart: 0Quantity:Price:$37.95Subtotal: -
Renthal 14T Front Sprocket for Honda CR80R CR85R CRF50F CRF70F 259--420-14GP
RENTHAL
$37.95If you're running a Honda CR80R, CR85R, CRF50F, or CRF70F in competition or serious trail riding, sprocket choice directly impacts your power delivery and handling. The Renthal 14T Front Sprocket cuts rotating mass by 10-15% while maintaining the...R25942014- SKU:
- R25942014
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TOOTH COUNT:
- 14
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 420
- TYPE:
- COUNTERSHAFT
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
$37.95Qty in Cart: 0Quantity:Price:$37.95Subtotal: -
Renthal 16T Grooved Front Sprocket for Honda XR400R TRX400EX 279--520-16GP
RENTHAL
$37.95If you're running a Honda XR400R or TRX400EX in serious conditions, your front sprocket takes a beating from mud, debris, and constant engagement stress. The Renthal 16T Grooved Front Sprocket delivers measurable performance gains—10-15% weight savings...R27952016- SKU:
- R27952016
- Availability:
- Ships Same Business Day
- Weight:
- 0.52 LBS
- MOUNTING POSITION:
- FRONT
- TOOTH COUNT:
- 16
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- TYPE:
- FRONT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MATERIAL:
- 655M13 NICKEL CHROMIUM STEEL
$37.95Qty in Cart: 0Quantity:Price:$37.95Subtotal: -
Renthal Steel Front Sprocket 14T 520 Chain Honda XR600R XR650L 282--520-14GP
RENTHAL
$37.95If you're running a Honda XR600R or XR650L in demanding terrain, your front sprocket takes a beating—mud buildup accelerates wear, excess weight kills acceleration, and premature failure means downtime. The Renthal 14T Steel Front Sprocket eliminates...R28252014- SKU:
- R28252014
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FRONT
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 14
- CHAIN SIZE:
- 520
- MATERIAL:
- 655M13 NICKEL CHROMIUM STEEL
$37.95 -
Renthal Front Sprocket 12-Tooth 520 Chain Kawasaki 289--520-12GP
RENTHAL
$37.95A quality front sprocket is fundamental to translating engine power into usable acceleration and throttle response. The Renthal 12-tooth front sprocket reduces rotating mass at the countershaft while maintaining the durability required for sustained...R28952012- SKU:
- R28952012
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 12
$37.95 -
Renthal 13-Tooth Front Sprocket 420 Chain KTM 65 SX 1998-2008 307-420-13GP
RENTHAL
$37.95If you're running a KTM 65 SX on the track or trail, sprocket wear directly impacts your power delivery and lap times. The Renthal 13-Tooth Front Sprocket delivers the precision engineering and durability needed to maintain consistent acceleration while...R30742013- SKU:
- R30742013
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- 655M13 NICKEL CHROMIUM STEEL
- CHAIN SIZE:
- 420
- TYPE:
- FRONT
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 13
$37.95 -
Renthal 49-Tooth Rear Sprocket for Suzuki 123U-520-49GYSI
RENTHAL
$99.82Whether you're pushing a Suzuki dirt bike through tight single-track or hitting the track hard, a worn or heavy sprocket robs you of acceleration and handling precision. The Renthal 49-Tooth Rear Sprocket delivers the lightweight efficiency and...R12349- SKU:
- R12349
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$99.82 -
Renthal 50-Tooth Rear Sprocket for Suzuki 123U-520-50GYSI
RENTHAL
$99.82Shaving 66% off your stock sprocket's weight directly translates to sharper acceleration and more responsive handling—critical advantages whether you're racing competitively or pushing hard on technical terrain. The 7075-T6 aluminum construction...R12350- SKU:
- R12350
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$99.82 -
Renthal 47-Tooth Rear Sprocket for Kawasaki 420 Chain Silver 408U-420-47GESI
RENTHAL
$99.82If you're running a Kawasaki 420 chain setup and want measurable gains in acceleration and reduced rotational mass, this 47-tooth rear sprocket is a direct path to both. By swapping steel for 7075-T6 aluminum, you'll shed approximately 66% of the...R408U42047- SKU:
- R408U42047
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
- CHAIN SIZE:
- 420
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
$99.82 -
Renthal Front 15-Tooth Sprocket for Honda 283--520-15GP
RENTHAL
$37.95A worn or compromised front sprocket kills acceleration and invites chain slippage—exactly what you don't need when you're pushing your Honda to its limits. The Renthal 15-Tooth Sprocket replaces weak OEM components with case-hardened 655M13...12120045- SKU:
- 12120045
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- TOOTH COUNT:
- 15
- CHAIN SIZE:
- 520
- MATERIAL:
- 655M13 NICKEL CHROMIUM STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FRONT
- UNITS:
- EACH
$37.95Qty in Cart: 0Quantity:Price:$37.95Subtotal: -
Renthal Ultralight Rear Sprocket 47T 420 Chain Silver 121U-420-47GBSI
RENTHAL
$99.82If you're running a Yamaha YZ65 and serious about shaving rotational mass, this Renthal ultralight rear sprocket delivers measurable gains in acceleration and throttle response. The 7075-T6 aluminum construction cuts weight by approximately 66% compared...12112061- SKU:
- 12112061
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- CHAIN SIZE:
- 420
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 47
- UNITS:
- EACH
- COLOR/FINISH:
- SILVER
- TYPE:
- DRIVE
$99.82 -
Renthal 46T Orange Rear Sprocket 192U-420-46GPOR
RENTHAL
$104.61If you're pushing your off-road bike to the limit, sprocket wear directly impacts your acceleration, handling, and reliability on the track or trail. The Renthal 46T Orange Rear Sprocket delivers the durability and lightweight performance you need to...12112465- SKU:
- 12112465
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 46
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
$104.61 -
Renthal 48T Rear Sprocket Orange 420 Chain KTM 65 SX 192U-420-48GPOR
RENTHAL
$104.61The Renthal 48T Rear Sprocket cuts unsprung weight without sacrificing durability, directly improving your KTM 65 SX's acceleration and handling response. Its CNC-machined 7075-T6 aluminum construction with self-cleaning mud grooves maintains consistent...12112467- SKU:
- 12112467
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
$104.61 -
Renthal 50-Tooth Rear Sprocket 420 Chain 192U-420-50GPOR
RENTHAL
$104.61If you're running a 65cc off-road bike, sprocket wear directly impacts acceleration, top-end speed, and overall drivetrain efficiency. The Renthal 50-Tooth Rear Sprocket cuts unnecessary weight while the CNC-machined 7075-T6 aluminum construction...12112468- SKU:
- 12112468
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 50
- MOUNTING POSITION:
- REAR
$104.61 -
Renthal 47-Tooth Rear Sprocket Orange 224U-520-47GPOR
RENTHAL
$104.61If you're running a 520 chain on your off-road bike or ATV, sprocket wear directly impacts acceleration, chain longevity, and overall drivetrain reliability. The Renthal 47-tooth rear sprocket delivers the durability and lightweight performance you need...12112473- SKU:
- 12112473
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 47
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- UNITS:
- EACH
$104.61 -
Renthal Ultralight Grooved Rear Sprocket 49 Teeth Orange 224U-520-49GPOR
RENTHAL
$104.61If you're running a 520 chain setup and want to cut unsprung weight without sacrificing durability, the Renthal Ultralight Grooved Rear Sprocket is engineered to deliver. At 66% lighter than steel, this 49-tooth sprocket reduces rotational mass for...12112475- SKU:
- 12112475
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 49
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- STREET
$104.61 -
Renthal 46T Rear Sprocket Orange 428 Chain Husqvarna TC85 441U-428-46GPOR
RENTHAL
$104.61Mud buildup and unsprung weight are the enemies of off-road traction and acceleration—especially in motocross and supercross conditions. The Renthal 46T Rear Sprocket eliminates both with CNC-machined self-cleaning grooves and 7075-T6 aluminum...12112482- SKU:
- 12112482
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 46
- UNITS:
- EACH
- TYPE:
- DRIVE
$104.61
