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
-
PARTS UNLIMITED Rear Honda Sprocket - 420 - 36 Tooth 41201-GEL-70036
PARTS UNLIMITED
$18.31A worn or damaged rear sprocket directly impacts power delivery, acceleration, and drivetrain longevity on your Honda. This OEM-spec replacement ensures precise chain engagement and maintains the exact gear ratios your engine was tuned for, eliminating...12100370- SKU:
- 12100370
- Availability:
- Ships Same Business Day
- Weight:
- 0.92 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 36
- UNITS:
- EACH
$18.31 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 13144-052
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket directly impacts your transmission's ability to deliver power efficiently and maintain precise gear engagement. The PARTS UNLIMITED 14-tooth countershaft sprocket restores OEM-spec performance, ensuring reliable...K222722- SKU:
- K222722
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 428
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- TOOTH COUNT:
- 14
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 13144-068
PARTS UNLIMITED
$13.21A worn or damaged countershaft sprocket directly impacts power delivery and shift quality—worn teeth cause chain slap, missed engagement, and accelerated wear on your entire drivetrain. The PARTS UNLIMITED 14-tooth countershaft sprocket restores precise...K222725- SKU:
- K222725
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 14
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
$13.21Qty in Cart: 0Quantity:Price:$13.21Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 23800-GC4-6014
PARTS UNLIMITED
$8.11A worn or damaged countershaft sprocket compromises power delivery and acceleration, leading to sluggish performance and increased drivetrain wear. The PARTS UNLIMITED 14-tooth countershaft sprocket restores OEM-exact specifications, ensuring precise...K222501A- SKU:
- K222501A
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 14
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
$8.11Qty in Cart: 0Quantity:Price:$8.11Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 23800-GL4-600
PARTS UNLIMITED
$8.11A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to costly chain wear and power loss. The PARTS UNLIMITED 15-Tooth Countershaft Sprocket delivers OEM-specification performance with precision-machined...K222501B- SKU:
- K222501B
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 15
$8.11 -
PARTS UNLIMITED Countershaft Sprocket - 13 Tooth 23801-107-76013
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket directly impacts your transmission's efficiency and overall drivetrain responsiveness. This OEM-spec replacement restores precise engagement between your primary drive and secondary shaft, eliminating slack and...K222501E- SKU:
- K222501E
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 13
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
$7.09Qty in Cart: 0Quantity:Price:$7.09Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 16-Tooth 23800-KB9-930
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket directly impacts your transmission's efficiency and power delivery. This OEM-spec replacement restores precise engagement between your primary and secondary gears, ensuring smooth shifting and eliminating the...K222501F- SKU:
- K222501F
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 16
- CHAIN SIZE:
- 428
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 23803-KS6-70013
PARTS UNLIMITED
$14.23A worn or damaged countershaft sprocket throws off your entire drivetrain geometry, causing power loss and accelerated wear on your chain and rear sprocket. This OEM-spec replacement restores factory precision and reliability, ensuring consistent power...K222501K- SKU:
- K222501K
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RAW
- TOOTH COUNT:
- 13
- UNITS:
- EACH
$14.23 -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 23801-964-000
PARTS UNLIMITED
$17.29A worn or damaged countershaft sprocket compromises power delivery and accelerates wear on your entire drivetrain. The PARTS UNLIMITED 13-Tooth Countershaft Sprocket restores precise engagement with your chain, ensuring consistent acceleration and...K222501T- SKU:
- K222501T
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- ATV
- TOOTH COUNT:
- 13
- UNITS:
- EACH
$17.29 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 23802-ML3-87014
PARTS UNLIMITED
$14.23A worn or damaged countershaft sprocket compromises power delivery and creates dangerous drivetrain slack. This PARTS UNLIMITED 14-tooth sprocket restores factory performance with precision-machined geometry and hardened steel construction built to exact...K222502B- SKU:
- K222502B
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- ATV
- TYPE:
- COUNTERSHAFT
- CHAIN SIZE:
- 520
- TOOTH COUNT:
- 14
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$14.23Qty in Cart: 0Quantity:Price:$14.23Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 23802-ML3-87015
PARTS UNLIMITED
$17.29A worn or damaged countershaft sprocket compromises power delivery and increases wear on your entire drivetrain. This OEM-spec replacement restores precise engagement and reliable shifting performance without modification to your existing setup. Whether...K222502C- SKU:
- K222502C
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 15
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
$17.29Qty in Cart: 0Quantity:Price:$17.29Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 12-Tooth 23801KK1-010-12
PARTS UNLIMITED
$13.21A worn or damaged countershaft sprocket directly impacts power delivery, throttle response, and overall drivetrain efficiency. This PARTS UNLIMITED 12-tooth unit restores OEM-level performance and reliability, ensuring precise engagement with your chain...K222502G- SKU:
- K222502G
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 12
$13.21 -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 23801KK1-010-13
PARTS UNLIMITED
$13.21A worn or damaged countershaft sprocket compromises power delivery and creates drivetrain noise that compounds over time. This PARTS UNLIMITED 13-tooth replacement restores precise engagement with your chain while maintaining OEM tolerances, ensuring...K222502H- SKU:
- K222502H
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 13
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
$13.21Qty in Cart: 0Quantity:Price:$13.21Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 174-17461-30
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to costly chain wear and performance loss. This PARTS UNLIMITED 13-tooth sprocket is manufactured to OEM specifications using hardened steel, ensuring...K222610- SKU:
- K222610
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- CHAIN SIZE:
- 428
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 13
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 174-17461-40
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and reliability. This OEM-spec replacement ensures precise engagement with your chain, restoring optimal power transfer and eliminating costly slack or misalignment...K222611- SKU:
- K222611
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 14
- CHAIN SIZE:
- 428
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
$7.09Qty in Cart: 0Quantity:Price:$7.09Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 16-Tooth 13144-1085
PARTS UNLIMITED
$16.27A worn or damaged countershaft sprocket will compromise your entire drivetrain's efficiency and reliability. This OEM-specification replacement ensures precise chain engagement, consistent power delivery, and maximum sprocket longevity. Whether you're...K222769- SKU:
- K222769
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- MATERIAL:
- STEEL
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- TOOTH COUNT:
- 16
$16.27 -
PARTS UNLIMITED Countershaft Sprocket - 17-Tooth 13144-1085-17T
PARTS UNLIMITED
$16.27A worn or damaged countershaft sprocket directly impacts your bike's acceleration, power delivery, and overall drivetrain efficiency. The PARTS UNLIMITED 17-Tooth Countershaft Sprocket restores OEM-spec performance with precision-machined teeth and...K222770- SKU:
- K222770
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 17
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
$16.27 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 13144-1163-14T
PARTS UNLIMITED
$20.35A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency, leading to power loss and accelerated wear on your chain and rear sprocket. The PARTS UNLIMITED 14-Tooth Countershaft Sprocket restores OEM-specification performance...K222797- SKU:
- K222797
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 14
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
$20.35Qty in Cart: 0Quantity:Price:$20.35Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 13144-1163-15T
PARTS UNLIMITED
$23.41A worn or damaged countershaft sprocket directly impacts your engine's power delivery and overall drivetrain efficiency. This OEM-specification replacement restores precise engagement with your chain, eliminating slop and ensuring consistent acceleration...K222798- SKU:
- K222798
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- TYPE:
- COUNTERSHAFT
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 15
$23.41 -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 27511-27100
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket directly impacts your engine's power delivery and overall drivetrain efficiency. This OEM-spec replacement restores precise gear engagement and eliminates the slack that develops over thousands of operating hours,...K222804- SKU:
- K222804
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- CHAIN SIZE:
- 428
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 15
$7.09
