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!
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- Price
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On Sale
JT SPROCKETS Countershaft Sprocket - 15 Tooth - Husaberg/KTM JTF1901.15
JT SPROCKETS
MSRP: $12.75Now: $11.35Was: $12.75A worn or damaged countershaft sprocket robs your Husaberg or KTM of efficient power transfer and increases drivetrain wear across the entire transmission system. This 15-tooth JT sprocket delivers...12120222- SKU:
- 12120222
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
MSRP: $12.75Now: $11.35Was: $12.75 -
On Sale
JT SPROCKETS Countershaft Sprocket - 14 Tooth JTF823.14
JT SPROCKETS
MSRP: $14.15Now: $12.59Was: $14.15A properly sized countershaft sprocket is critical to optimizing your drivetrain's power delivery and acceleration characteristics. The JT Sprockets 14-tooth design delivers the strength and...12120231- SKU:
- 12120231
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
MSRP: $14.15Now: $12.59Was: $14.15 -
On Sale
JT SPROCKETS Countershaft Sprocket - 15 Tooth JTF327.15
JT SPROCKETS
MSRP: $14.23Now: $12.66Was: $14.23A worn or undersized countershaft sprocket robs your motorcycle of crisp throttle response and efficient power delivery. The JT Sprockets 15-tooth countershaft sprocket delivers reliable engagement...12120571- SKU:
- 12120571
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
MSRP: $14.23Now: $12.66Was: $14.23 -
On Sale
JT SPROCKETS Countershaft Sprocket - 14 Tooth - Honda/Kawasaki JTF273.14
JT SPROCKETS
MSRP: $7.20Now: $6.41Was: $7.20A worn or damaged countershaft sprocket directly impacts acceleration, engine response, and drivetrain efficiency—especially in racing applications where precise power delivery matters. This JT...12120787- SKU:
- 12120787
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $7.20Now: $6.41Was: $7.20 -
On Sale
JT SPROCKETS Countershaft Sprocket - 14 Tooth - Yamaha JTF548.14
JT SPROCKETS
MSRP: $7.20Now: $6.41Was: $7.20A worn or damaged countershaft sprocket directly impacts your power delivery and throttle response. This OEM-spec JT Sprocket delivers the precise engagement and durability you need to maintain...12120789- SKU:
- 12120789
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $7.20Now: $6.41Was: $7.20 -
On Sale
JT SPROCKETS Countershaft Sprocket - 15 Tooth - KLX150L JTF273.15
JT SPROCKETS
MSRP: $7.20Now: $6.41Was: $7.20A worn or damaged countershaft sprocket directly impacts your KLX150L's acceleration, chain tension, and overall drivetrain efficiency. This OEM-specification replacement restores proper gear...12120793- SKU:
- 12120793
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
MSRP: $7.20Now: $6.41Was: $7.20 -
On Sale
JT SPROCKETS Countershaft Sprocket - 14 Tooth - Honda JTF277.14
JT SPROCKETS
MSRP: $7.20Now: $6.41Was: $7.20The countershaft sprocket is critical to your Honda's acceleration curve and throttle response—choose the wrong tooth count and you're leaving performance on the table. This 14-tooth JT sprocket...12120933- SKU:
- 12120933
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $7.20Now: $6.41Was: $7.20 -
On Sale
JT SPROCKETS Countershaft Sprocket - 16 Tooth - Honda JTF1309.16
JT SPROCKETS
MSRP: $20.05Now: $17.84Was: $20.05A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and acceleration response. This JT Sprockets 16-tooth replacement restores precise power delivery to your rear...12121147- SKU:
- 12121147
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $20.05Now: $17.84Was: $20.05 -
On Sale
JT SPROCKETS Countershaft Sprocket - 11 Tooth - KTM JTF1901.11
JT SPROCKETS
MSRP: $12.75Now: $11.35Was: $12.75A worn or damaged countershaft sprocket directly compromises power delivery and throttle response on your KTM. This JT Sprockets 11-tooth replacement restores precise engagement between your engine...12121152- SKU:
- 12121152
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $12.75Now: $11.35Was: $12.75 -
On Sale
JT SPROCKETS Countershaft Sprocket - 16 Tooth JTF1901.16SC
JT SPROCKETS
MSRP: $19.13Now: $17.03Was: $19.13A worn or mismatched countershaft sprocket directly impacts your motorcycle's power delivery and acceleration characteristics. This 16-tooth JT sprocket restores crisp throttle response and maintains...12121153- SKU:
- 12121153
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
MSRP: $19.13Now: $17.03Was: $19.13 -
On Sale
JT SPROCKETS Countershaft Sprocket - 16 Tooth - Yamaha JTF546.16
JT SPROCKETS
MSRP: $6.53Now: $5.81Was: $6.53A worn or undersized countershaft sprocket robs your Yamaha of acceleration and throttle responsiveness. This 16-tooth sprocket restores crisp power delivery and optimizes your gearing for aggressive...12122000- SKU:
- 12122000
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $6.53Now: $5.81Was: $6.53 -
On Sale
JT SPROCKETS Countershaft Sprocket - 15 Tooth - Gas Gas/Husqvarna/KTM JTF1906.15
JT SPROCKETS
MSRP: $10.95Now: $9.75Was: $10.95A worn or damaged countershaft sprocket directly impacts your bike's acceleration, engine response, and overall drivetrain efficiency. The JT Sprockets 15-tooth countershaft sprocket is engineered to...12121209- SKU:
- 12121209
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $10.95Now: $9.75Was: $10.95Qty in Cart: 0Quantity:Price:MSRP: $10.95Now: $9.75Was: $10.95Subtotal: -
On Sale
JT SPROCKETS Countershaft Sprocket - 15 Tooth - DRZ125/L JTF409.15
JT SPROCKETS
MSRP: $11.90Now: $10.59Was: $11.90The countershaft sprocket is a critical drivetrain component that directly affects your DRZ125/L's acceleration, top speed, and overall power delivery. A worn or damaged sprocket will cause chain...12121224- SKU:
- 12121224
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
MSRP: $11.90Now: $10.59Was: $11.90Qty in Cart: 0Quantity:Price:MSRP: $11.90Now: $10.59Was: $11.90Subtotal: -
On Sale
JT SPROCKETS Countershaft Sprocket - 13 Tooth - XR/XL250 JTF1265.13
JT SPROCKETS
MSRP: $10.03Now: $8.93Was: $10.03A precision countershaft sprocket is critical to your XR/XL250's power delivery and chain longevity. JT Sprockets' 13-tooth design combines computer-optimized tooth geometry with induction-hardened...12121289- SKU:
- 12121289
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
MSRP: $10.03Now: $8.93Was: $10.03 -
On Sale
JT SPROCKETS Countershaft Sprocket - 13 Tooth - KX250F JTF1446.13
JT SPROCKETS
MSRP: $12.83Now: $11.42Was: $12.83A worn or damaged countershaft sprocket directly impacts throttle response, power delivery, and overall drivetrain efficiency on your KX250F. Upgrading to JT's precision-engineered 13-tooth...12121557- SKU:
- 12121557
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $12.83Now: $11.42Was: $12.83 -
On Sale
JT SPROCKETS Countershaft Sprocket - 15 Tooth - Kawasaki JTF511.15RB
JT SPROCKETS
MSRP: $17.63Now: $15.69Was: $17.63A 15-tooth countershaft sprocket directly impacts your bike's power delivery and acceleration characteristics. By reducing the gear ratio, this JT Sprockets component pulls harder out of corners and...12121930- SKU:
- 12121930
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $17.63Now: $15.69Was: $17.63 -
On Sale
JT SPROCKETS Countershaft Sprocket - 13 Tooth - DR650 JTF1448.13
JT SPROCKETS
MSRP: $14.70Now: $13.08Was: $14.70A worn or damaged countershaft sprocket directly impacts power delivery and throttle response on your DR650. This OEM-equivalent replacement restores precise gear engagement and eliminates chain...12121944- SKU:
- 12121944
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
MSRP: $14.70Now: $13.08Was: $14.70 -
On Sale
JT SPROCKETS Countershaft Sprocket - 13 Tooth - Kawasaki JTF1565.13
JT SPROCKETS
MSRP: $11.65Now: $10.37Was: $11.65A 13-tooth countershaft sprocket is essential for riders seeking sharper acceleration and more responsive throttle control without sacrificing top-end capability. The JT Sprockets JTF1565.13 delivers...12121949- SKU:
- 12121949
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $11.65Now: $10.37Was: $11.65 -
On Sale
JT SPROCKETS Countershaft Sprocket - 13 Tooth - Gas Gas/Yamaha JTF1590.13
JT SPROCKETS
MSRP: $12.15Now: $10.81Was: $12.15A worn or damaged countershaft sprocket compromises power delivery and creates inconsistent acceleration across the entire RPM range. This 13-tooth JT sprocket restores precise gear engagement and...12121951- SKU:
- 12121951
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $12.15Now: $10.81Was: $12.15 -
On Sale
JT SPROCKETS Countershaft Sprocket - 14 Tooth - Yamaha JTF1590.14
JT SPROCKETS
MSRP: $12.15Now: $10.81Was: $12.15A 14-tooth countershaft sprocket is a direct way to sharpen your Yamaha's acceleration and throttle response without major engine modifications. If you're running stock gearing or stepping up from a...12121952- SKU:
- 12121952
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $12.15Now: $10.81Was: $12.15
