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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VESRAH Clutch Spring Set SK-318
VESRAH
$14.75Clutch spring performance directly impacts your bike's engagement consistency, throttle response, and overall rideability. The SK-318 delivers measurable improvements over factory springs, especially if you're running higher power outputs or demanding...SK318- SKU:
- SK318
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- SPRING MATERIAL:
- STEEL
- TYPE:
- CLUTCH
- UNITS:
- SET
- PRODUCT NAME:
- SPRING SET
$14.75Qty in Cart: 0Quantity:Price:$14.75Subtotal: -
MOOSE RACING Clutch Basket M192
MOOSE RACING
$212.95Stock clutch baskets generate excessive heat during disengagement and wear prematurely under racing conditions. The MOOSE RACING M192 upgrades your clutch assembly with precision engineering and superior materials that reduce heat buildup, improve...11320047- SKU:
- 11320047
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- MATERIAL:
- 6061 AIRCRAFT-GRADE ALUMINUM ALLOY
- PRODUCT NAME:
- CLUTCH BASKET
- COLOR/FINISH:
- ANODIZED
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$212.95 -
MOOSE RACING Steel Clutch Plates M80-7509-6
MOOSE RACING
$42.95Stock aluminum clutch plates fade under sustained load and wear prematurely—leaving you stranded mid-season or worse, mid-race. The MOOSE RACING Steel Clutch Plates M80-7509-6 eliminate that liability entirely. By switching to forged steel construction,...11310765- SKU:
- 11310765
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- UNITS:
- SET
- TYPE:
- CLUTCH
- DRIVE PLATE MATERIAL:
- STEEL
- PRODUCT NAME:
- DRIVE PLATE SET (STEEL PLATE SET)
- RIDING STYLE:
- OFF-ROAD
$42.95 -
MOOSE RACING Steel Clutch Plates - KX80/85/100 M80-7313-5
MOOSE RACING
$38.95If you're running a KX80/85/100 and tired of replacing clutch plates every season, steel clutch plates deliver the durability and consistency aluminum simply can't match. The added weight provides measurable improvements in starting response and traction...M807313- SKU:
- M807313
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- UNITS:
- SET
- PRODUCT NAME:
- DRIVE PLATE SET (STEEL PLATE SET)
- RIDING STYLE:
- OFF-ROAD
- DRIVE PLATE MATERIAL:
- STEEL
- TYPE:
- CLUTCH
$38.95 -
MOOSE RACING Steel Clutch Plates M80-7404-7
MOOSE RACING
$61.95If you're running aluminum clutch plates, you're accepting a compromise between weight and longevity. MOOSE Racing's steel clutch plates eliminate that trade-off entirely—delivering superior durability without sacrificing the performance benefits of...M807404- SKU:
- M807404
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- RIDING STYLE:
- UTV
- TYPE:
- CLUTCH
- PRODUCT NAME:
- DRIVE PLATE SET (STEEL PLATE SET)
- RIDING STYLE:
- ATV
- DRIVE PLATE MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
$61.95 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 517-17461-41
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket directly impacts your bike's acceleration response and overall drivetrain efficiency. This OEM-spec replacement restores precise power delivery to the rear wheel with zero slop or timing variance. If you're...K222659- SKU:
- K222659
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TOOTH COUNT:
- 14
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- RIDING STYLE:
- STREET
- CHAIN SIZE:
- 420
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 174-17461-50
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket compromises power delivery and accelerates wear on your entire drivetrain. This PARTS UNLIMITED 15-tooth sprocket restores precise engagement with your chain, ensuring consistent gear ratios and reliable...K222612- SKU:
- K222612
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 15
- CHAIN SIZE:
- 428
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
$7.09Qty in Cart: 0Quantity:Price:$7.09Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 16-Tooth 174-17461-60
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to chain slippage or premature wear on mating components. The PARTS UNLIMITED 16-tooth countershaft sprocket restores OEM-spec performance with...K222613- SKU:
- K222613
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 16
- TYPE:
- COUNTERSHAFT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- CHAIN SIZE:
- 428
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 214-17461-30
PARTS UNLIMITED
$12.19A worn or damaged countershaft sprocket directly impacts your power delivery and chain engagement—replacing it with a precision-manufactured OEM-spec part restores reliable acceleration and extends drivetrain life. This 13-tooth sprocket is engineered to...K222624- SKU:
- K222624
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- TOOTH COUNT:
- 13
- UNITS:
- EACH
$12.19Qty in Cart: 0Quantity:Price:$12.19Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 214-17461-40
PARTS UNLIMITED
$12.19A worn or damaged countershaft sprocket directly impacts your transmission's ability to deliver consistent power to the chain and rear wheel. This 14-tooth replacement restores precise engagement and eliminates slack that can cause premature chain wear,...K222625- SKU:
- K222625
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TOOTH COUNT:
- 14
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
$12.19Qty in Cart: 0Quantity:Price:$12.19Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 5Y1-17461-50
PARTS UNLIMITED
$14.23A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to costly secondary damage. This OEM-spec replacement restores precise engagement with your chain, ensuring reliable power delivery and extending the...K222668- SKU:
- K222668
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- COLOR/FINISH:
- RAW
- TOOTH COUNT:
- 15
- PRODUCT NAME:
- SPROCKET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
$14.23 -
PARTS UNLIMITED Countershaft Sprocket - 12-Tooth 174-17461-20
PARTS UNLIMITED
$8.11A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to costly chain slippage and premature wear on downstream components. The PARTS UNLIMITED 12-Tooth Countershaft Sprocket restores OEM-spec performance...K222676- SKU:
- K222676
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- CHAIN SIZE:
- 428
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 12
- COLOR/FINISH:
- RAW
$8.11Qty in Cart: 0Quantity:Price:$8.11Subtotal: -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 5HO-17461-50
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket compromises power delivery and can lead to chain slippage or accelerated wear on your entire drivetrain. This PARTS UNLIMITED replacement restores the precise tooth geometry and spline engagement your transmission...K222678- SKU:
- K222678
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 428
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 15
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
$7.09 -
MOOSE RACING Kickstarter 80-0561-00-60
MOOSE RACING
$184.79The MOOSE RACING Kickstarter is engineered for reliability in the harshest racing and off-road conditions. Built from aircraft-grade aluminum and hard anodized for UV resistance, this mounting bracket delivers OEM-matched fitment without compromise...11120051- SKU:
- 11120051
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK ANODIZED
- PRODUCT NAME:
- KICKSTARTER
- UNITS:
- EACH
- MATERIAL:
- 6061 ALUMINUM
$184.79 -
PARTS UNLIMITED Rear Yamaha Sprocket - 420 - 32 Tooth 21W-25432-10
PARTS UNLIMITED
$16.27A worn or damaged rear sprocket directly impacts your power delivery, throttle response, and chain wear patterns. The PARTS UNLIMITED 420 32-tooth rear sprocket restores OEM-specification performance with precision-machined teeth and splines that...K223603K- SKU:
- K223603K
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- TOOTH COUNT:
- 32
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$16.27 -
PARTS UNLIMITED Single Bearing - 20 x 42 x 12 6004-2RS
PARTS UNLIMITED
$5.25Precision bearings are the foundation of reliable high-performance machinery—any slop or degradation in your rotating assemblies directly impacts efficiency, noise levels, and component lifespan. The PARTS UNLIMITED 6004-2RS delivers electric motor-grade...60042RS- SKU:
- 60042RS
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- INSIDE DIAMETER:
- 20 MM
- RIDING STYLE:
- STREET
- THICKNESS:
- 12 MM
- OUTSIDE DIAMETER:
- 42 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- SNOW
- STYLE:
- SMOOTH
- RIDING STYLE:
- ATV
- TYPE:
- DOUBLE SEAL
- UNITS:
- EACH
$5.25Qty in Cart: 0Quantity:Price:$5.25Subtotal: -
MOOSE RACING 520 HPO - O-Ring Clip Connecting Link - Master Link M573-00-01
MOOSE RACING
$6.95A worn or damaged chain connecting link compromises power delivery and creates safety hazards at speed. The MOOSE RACING 520 HPO O-Ring Master Link restores full chain integrity with precision engineering and reliable clip retention. This is a direct...M5730001- SKU:
- M5730001
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- COLOR/FINISH:
- NATURAL
- MODEL:
- HPO SERIES
- CHAIN TYPE:
- 520 HPO
- NUMBER OF LINKS:
- 1
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MASTER LINK CONNECTOR:
- CLIP
- PRODUCT NAME:
- CONNECTING LINK
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$6.95 -
MOOSE RACING 520 HPO - O-Ring Chain - 110 PLT M573-00-110
MOOSE RACING
$102.95A chain is only as strong as its weakest link—and this Moose Racing 520 HPO delivers the tensile strength and durability demanded by mid-range performance engines. Built with vacuum-injected grease and O-ring seals, it keeps lubrication where it matters...M57300110- SKU:
- M57300110
- Availability:
- Ships Same Business Day
- Weight:
- 3.40 LBS
- MASTER LINK CONNECTOR:
- CLIP
- MAXIMUM ENGINE DISPLACEMENT (OFFROAD):
- 450 CC
- NUMBER OF LINKS:
- 110
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- CHAIN SIZE:
- 520
- CHAIN TYPE:
- 520 HPO
- PRODUCT NAME:
- DRIVE CHAIN
- SEAL TYPE:
- O-RING
- TENSILE STRENGTH METRIC:
- 33.3 KN
- MODEL:
- HPO SERIES
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- NATURAL
- RIDING STYLE:
- ATV
- TENSILE STRENGTH IMPERIAL:
- 7496 LB
- UNITS:
- EACH
$102.95 -
MOOSE RACING 520 HPO - O-Ring Chain - 114 PLT M573-00-114
MOOSE RACING
$106.95A quality chain is the backbone of reliable power delivery—poor chain maintenance leads to premature wear, power loss, and potential catastrophic failure. The MOOSE RACING 520 HPO O-Ring Chain delivers the durability and precision your mid-range...M57300114- SKU:
- M57300114
- Availability:
- Ships Same Business Day
- Weight:
- 3.40 LBS
- CHAIN TYPE:
- 520 HPO
- PRODUCT NAME:
- DRIVE CHAIN
- SEAL TYPE:
- O-RING
- MASTER LINK CONNECTOR:
- CLIP
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- NATURAL
- MAXIMUM ENGINE DISPLACEMENT (OFFROAD):
- 450 CC
- NUMBER OF LINKS:
- 114
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- TENSILE STRENGTH IMPERIAL:
- 7496 LB
- CHAIN SIZE:
- 520
- MODEL:
- HPO SERIES
- TENSILE STRENGTH METRIC:
- 33.3 KN
$106.95 -
MOOSE RACING 520 HPO - O-Ring Chain - 116 PLT M573-00-116
MOOSE RACING
$108.95A properly functioning chain is fundamental to reliable power transfer on mid-displacement bikes—any compromise in durability or tensile strength directly impacts acceleration, handling, and safety. The MOOSE RACING 520 HPO delivers the...M57300116- SKU:
- M57300116
- Availability:
- Ships Same Business Day
- Weight:
- 3.40 LBS
- CHAIN TYPE:
- 520 HPO
- PRODUCT NAME:
- DRIVE CHAIN
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- SEAL TYPE:
- O-RING
- MASTER LINK CONNECTOR:
- CLIP
- MODEL:
- HPO SERIES
- NUMBER OF LINKS:
- 116
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- NATURAL
- MAXIMUM ENGINE DISPLACEMENT (OFFROAD):
- 450 CC
- RIDING STYLE:
- UTV
- TENSILE STRENGTH IMPERIAL:
- 7496 LB
- TENSILE STRENGTH METRIC:
- 33.3 KN
- CHAIN SIZE:
- 520
$108.95
