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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- Qty in Cart
- Quantity
- Price
- Subtotal
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JT SPROCKETS Countershaft Sprocket - 13 Tooth - Kawasaki JTF1565.13
JT SPROCKETS
$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 the gear ratio adjustment that transforms your...12121949- SKU:
- 12121949
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$11.65 -
JT SPROCKETS Countershaft Sprocket - 13 Tooth - Gas Gas/Yamaha JTF1590.13
JT SPROCKETS
$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 maintains the exacting tolerances your engine demands,...12121951- SKU:
- 12121951
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$12.15 -
JT SPROCKETS Countershaft Sprocket - 14 Tooth - Yamaha JTF1590.14
JT SPROCKETS
$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 worn sprocket, this upgrade delivers noticeable...12121952- SKU:
- 12121952
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$12.15Qty in Cart: 0Quantity:Price:$12.15Subtotal: -
JT SPROCKETS Countershaft Sprocket - 13 Tooth JTF1901.13
JT SPROCKETS
$12.75A 13-tooth countershaft sprocket is the foundation of your bike's acceleration profile—getting the ratio right means the difference between sluggish takeoff and crisp, responsive power delivery. If you're running stock gearing and feel like you're...12121954- SKU:
- 12121954
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$12.75Qty in Cart: 0Quantity:Price:$12.75Subtotal: -
JT SPROCKETS Countershaft Sprocket - 13 Tooth - Husqvarna/KTM JTF1905.13
JT SPROCKETS
$10.03A worn or damaged countershaft sprocket directly impacts your power delivery and throttle response—replace it with this precision-engineered JT sprocket to restore peak drivetrain efficiency. Built from SCM420 chromoly steel, this 13-tooth sprocket is...12121956- SKU:
- 12121956
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$10.03 -
JT SPROCKETS Countershaft Sprocket - 14 Tooth - KTM/Husqvarna JTF1905.14
JT SPROCKETS
$10.03A worn or incorrect countershaft sprocket directly impacts your KTM or Husqvarna's acceleration response, chain wear, and overall drivetrain efficiency. This 14-tooth replacement from JT Sprockets restores precise gear engagement and maintains the...12121957- SKU:
- 12121957
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$10.03 -
JT SPROCKETS Countershaft Sprocket - 13 Tooth - CR125R JTF266.13
JT SPROCKETS
$13.15A worn or damaged countershaft sprocket directly impacts your CR125R's power delivery and acceleration consistency. This JT Sprockets replacement ensures precise chain engagement and maintains optimal gear ratios for competitive lap times or casual...12121958- SKU:
- 12121958
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$13.15Qty in Cart: 0Quantity:Price:$13.15Subtotal: -
JT SPROCKETS Countershaft Sprocket - 13 Tooth - KLX150 JTF273.13
JT SPROCKETS
$7.20The countershaft sprocket is the critical link between your engine's power delivery and wheel acceleration on the KLX150. A worn or incorrect sprocket directly impacts throttle response, top-end speed, and overall drivetrain efficiency. This JT Sprockets...12121961- SKU:
- 12121961
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$7.20 -
JT SPROCKETS Countershaft Sprocket - 13 Tooth - XR/CRF100 JTF274.13
JT SPROCKETS
$7.20A worn or damaged countershaft sprocket directly impacts your XR/CRF100's acceleration response and overall drivetrain efficiency. This OEM-compatible replacement restores precise power delivery to the rear wheel while eliminating the noise and slack...12121962- SKU:
- 12121962
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$7.20 -
JT SPROCKETS Countershaft Sprocket - 16 Tooth - Honda JTF281.16
JT SPROCKETS
$14.03A worn or stock countershaft sprocket directly impacts your Honda's acceleration, throttle response, and drivetrain reliability. The JT Sprockets 16-tooth countershaft sprocket delivers the precision engineering and material durability your motorcycle...12121964- SKU:
- 12121964
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$14.03 -
JT SPROCKETS Countershaft Sprocket - 13 Tooth - Honda JTF284.13
JT SPROCKETS
$12.58A 13-tooth countershaft sprocket directly improves your Honda's acceleration response and power delivery to the rear wheel by optimizing your primary gear ratio. If you're looking for sharper throttle response and quicker launch characteristics, this JT...12121965- SKU:
- 12121965
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$12.58 -
JT SPROCKETS Countershaft Sprocket - 14 Tooth - Honda JTF284.14
JT SPROCKETS
$12.58A worn or incorrect countershaft sprocket directly impacts your Honda's acceleration, top-end performance, and chain longevity. This 14-tooth JT sprocket restores precise power delivery and handling characteristics by replacing factory wear with...12121966- SKU:
- 12121966
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$12.58 -
JT SPROCKETS Countershaft Sprocket - 15 Tooth - Honda JTF287.15
JT SPROCKETS
$14.30A worn or damaged countershaft sprocket directly compromises your engine's power delivery and overall drivetrain efficiency. This JT Sprockets 15-tooth countershaft sprocket restores precise gear engagement, ensuring consistent acceleration and reliable...12121967- SKU:
- 12121967
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
$14.30 -
JT SPROCKETS Countershaft Sprocket - 17 Tooth - BMW/Husqvarna JTF402.17
JT SPROCKETS
$18.70A worn or damaged countershaft sprocket directly impacts your BMW or Husqvarna's acceleration response and overall drivetrain efficiency. This OEM-equivalent JT Sprockets component restores precise power delivery to the rear wheel while maintaining the...12121974- SKU:
- 12121974
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
$18.70Qty in Cart: 0Quantity:Price:$18.70Subtotal: -
JT SPROCKETS Countershaft Sprocket - 14 Tooth - Kawasaki JTF418.14
JT SPROCKETS
$7.20A worn or damaged countershaft sprocket directly impacts your power delivery and throttle response—don't compromise your transmission's efficiency with inferior parts. JT Sprockets engineered this 14-tooth countershaft sprocket from SCM420 chromoly steel...12121975- SKU:
- 12121975
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$7.20Qty in Cart: 0Quantity:Price:$7.20Subtotal: -
On Sale
JT SPROCKETS Countershaft Sprocket - 15 Tooth - KE100 JTF418.15
JT SPROCKETS
MSRP: $7.20Now: $5.00Was: $7.20A properly sized countershaft sprocket is critical for achieving optimal power delivery and maintaining precise gear ratios on your KE100. This JT Sprockets 15-tooth unit ensures reliable engagement and smooth power transfer from engine to transmission,...12121976- SKU:
- 12121976
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $7.20Now: $5.00Was: $7.20Qty in Cart: 0Quantity:Price:MSRP: $7.20Now: $5.00Was: $7.20Subtotal: -
On Sale
JT SPROCKETS Countershaft Sprocket - 15 Tooth - Suzuki JTF430.15
JT SPROCKETS
MSRP: $9.95Now: $7.00Was: $9.95A 15-tooth countershaft sprocket directly impacts your acceleration curve and low-end torque delivery—critical factors whether you're racing or pushing hard on technical terrain. JT's SCM420 chromoly construction provides the durability needed to handle...12121981- SKU:
- 12121981
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
MSRP: $9.95Now: $7.00Was: $9.95Qty in Cart: 0Quantity:Price:MSRP: $9.95Now: $7.00Was: $9.95Subtotal: -
JT SPROCKETS Countershaft Sprocket - 14 Tooth - Suzuki JTF431.14
JT SPROCKETS
$16.20A worn or damaged countershaft sprocket directly impacts your power delivery and clutch engagement, compromising both acceleration and shift quality. This JT Sprockets 14-tooth replacement restores the precise gear ratio your Suzuki was engineered for,...12121984- SKU:
- 12121984
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
$16.20 -
JT SPROCKETS Countershaft Sprocket - 14 Tooth - Suzuki JTF433.14
JT SPROCKETS
$11.30A worn or damaged countershaft sprocket directly impacts your transmission's efficiency and throttle response. The JT Sprockets 14-tooth countershaft sprocket delivers reliable power transfer with minimal wear, keeping your shift engagement crisp and...12121987- SKU:
- 12121987
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$11.30 -
JT SPROCKETS Countershaft Sprocket - 15 Tooth - Suzuki JTF433.15
JT SPROCKETS
$11.30A worn or damaged countershaft sprocket directly compromises your bike's power delivery and acceleration response. This OEM-specification JT sprocket restores precise gear engagement and maintains the tight tolerances your drivetrain demands. Built from...12121988- SKU:
- 12121988
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$11.30
