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 - 428 - 49 Tooth 41201-364-790
PARTS UNLIMITED
$29.53A worn or damaged sprocket directly impacts your Honda's acceleration, top-end performance, and overall drivetrain efficiency. This OEM-spec rear sprocket restores precise chain engagement and eliminates the performance loss that comes with worn teeth or...K223588- SKU:
- K223588
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- CHAIN SIZE:
- 428
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
$29.53 -
PARTS UNLIMITED Rear Yamaha Sprocket - 482 - 45 Tooth 248-25445-10
PARTS UNLIMITED
$24.43A worn or damaged rear sprocket directly compromises your acceleration, top-end speed, and overall drivetrain efficiency. This PARTS UNLIMITED rear sprocket restores OEM performance with precision-machined teeth and splines that ensure perfect chain...K223602- SKU:
- K223602
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 45
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- TYPE:
- DRIVE
- UNITS:
- EACH
$24.43 -
PARTS UNLIMITED Rear Yamaha Sprocket - 428 - 44 Tooth 4V1-25444-10
PARTS UNLIMITED
$27.49A worn or damaged rear sprocket kills acceleration and compromises chain engagement, directly impacting your bike's performance and reliability. This OEM-specification sprocket restores precise tooth geometry and spline fit, ensuring consistent power...K223602L- SKU:
- K223602L
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 428
- TYPE:
- DRIVE
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 44
$27.49Qty in Cart: 0Quantity:Price:$27.49Subtotal: -
PARTS UNLIMITED Rear Yamaha Sprocket - 428 - 50 Tooth 15A-25450-10
PARTS UNLIMITED
$27.49A worn or damaged rear sprocket compromises your entire drivetrain's efficiency, causing power loss and accelerated wear on your chain and transmission. The PARTS UNLIMITED Rear Yamaha Sprocket delivers OEM-specification performance with...K223603J- SKU:
- K223603J
- Availability:
- Ships Same Business Day
- Weight:
- 2.56 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- TYPE:
- DRIVE
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 428
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$27.49Qty in Cart: 0Quantity:Price:$27.49Subtotal: -
PARTS UNLIMITED Rear Yamaha Sprocket - 520 - 38 Tooth 5Y1-25438-20
PARTS UNLIMITED
$29.53Your rear sprocket is critical to power delivery and acceleration—worn or damaged teeth directly impact throttle response and chain wear. This OEM-spec replacement restores precise engagement with your chain while eliminating play that degrades...K223603N- SKU:
- K223603N
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- TOOTH COUNT:
- 38
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- ATV
- TYPE:
- DRIVE
- UNITS:
- EACH
$29.53 -
PARTS UNLIMITED Rear Suzuki Sprocket - 428 - 48 Tooth 64511-20920-48
PARTS UNLIMITED
$25.45A worn or damaged rear sprocket compromises your power delivery, accelerates chain wear, and can leave you stranded. This OEM-spec replacement restores precise engagement with your chain and delivers the reliable performance your Suzuki demands. Whether...K223801W- SKU:
- K223801W
- Availability:
- Ships Same Business Day
- Weight:
- 1.88 LBS
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 428
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
$25.45 -
PARTS UNLIMITED Rear Suzuki Sprocket - 520 - 47 Tooth 64511-40285-47T
PARTS UNLIMITED
$41.77A worn or damaged rear sprocket directly impacts your bike's acceleration, top speed, and overall drivetrain efficiency—making this a critical wear item for any serious rider. This OEM-spec replacement ensures perfect chain alignment and engagement,...K223802V- SKU:
- K223802V
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
$41.77 -
PARTS UNLIMITED Rear Suzuki Sprocket - 428 - 47 Tooth 64511-20920-47
PARTS UNLIMITED
$27.49A worn or damaged rear sprocket directly impacts your bike's acceleration, top-end performance, and overall drivetrain efficiency. This OEM-specification sprocket ensures you maintain precise power delivery and chain compatibility without compromise...K223803S- SKU:
- K223803S
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 428
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
$27.49 -
PARTS UNLIMITED Rear Suzuki Sprocket - 520 - 39 Tooth 64511-29000
PARTS UNLIMITED
$32.59A worn or damaged rear sprocket directly compromises your power delivery and acceleration precision—critical factors whether you're chasing lap times or maintaining consistent performance on the street. This OEM-specification replacement ensures your...K223811- SKU:
- K223811
- Availability:
- Ships Same Business Day
- Weight:
- 1.88 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 39
- MATERIAL:
- STEEL
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
$32.59Qty in Cart: 0Quantity:Price:$32.59Subtotal: -
PARTS UNLIMITED Rear Suzuki Sprocket - 525 - 40 Tooth 64511-30700
PARTS UNLIMITED
$41.77A worn or damaged sprocket directly impacts your chain engagement, acceleration response, and overall drivetrain efficiency. The PARTS UNLIMITED Rear Suzuki Sprocket restores OEM-spec performance with precision-machined teeth and hardened steel...K223816- SKU:
- K223816
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- TOOTH COUNT:
- 40
- CHAIN SIZE:
- 525
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$41.77 -
PARTS UNLIMITED Rear Suzuki Sprocket - 520 - 50 Tooth 64511-41131
PARTS UNLIMITED
$51.97A worn or damaged rear sprocket compromises your chain drive efficiency and can leave you stranded mid-race or ride. This OEM-spec replacement sprocket restores precise engagement with your chain, ensuring consistent power delivery and eliminating the...K223842- SKU:
- K223842
- Availability:
- Ships Same Business Day
- Weight:
- 2.38 LBS
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
$51.97 -
PARTS UNLIMITED Rear Honda Sprocket - 520 - 45 Tooth 41201-KCY-67
PARTS UNLIMITED
$36.67A worn or damaged rear sprocket directly compromises your chain engagement, power delivery, and overall drivetrain efficiency. This OEM-spec PARTS UNLIMITED rear sprocket ensures precise tooth geometry and spline fitment, eliminating slack and maximizing...K223902- SKU:
- K223902
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 45
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
$36.67 -
PARTS UNLIMITED Rear Honda Sprocket - 520 - 45 Tooth 41201-MY6-67
PARTS UNLIMITED
$31.57A worn or damaged rear sprocket compromises power delivery, increases drivetrain wear, and can leave you stranded mid-race or ride. This OEM-spec replacement restores precise chain engagement and efficient power transfer, ensuring consistent acceleration...K223911- SKU:
- K223911
- Availability:
- Ships Same Business Day
- Weight:
- 2.28 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- NATURAL
- TYPE:
- DRIVE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 45
$31.57 -
PARTS UNLIMITED Rear Suzuki Sprocket - 520 - 44 Tooth 64511-08D50
PARTS UNLIMITED
$30.55A worn or damaged rear sprocket compromises your chain drive efficiency and can lead to premature wear across your entire drivetrain. The PARTS UNLIMITED Rear Suzuki Sprocket delivers OEM-matched performance and durability, ensuring precise engagement...K223932- SKU:
- K223932
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 44
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
$30.55 -
PARTS UNLIMITED Rear Yamaha Sprocket - 520 - 44 Tooth 214-25444-10
PARTS UNLIMITED
$44.83A worn or damaged sprocket directly undermines your bike's acceleration, top-end performance, and chain longevity. The PARTS UNLIMITED Rear Yamaha Sprocket delivers OEM-spec durability and precision fitment, ensuring smooth power delivery without the...K223621- SKU:
- K223621
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 44
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$44.83 -
PARTS UNLIMITED Rear Honda Sprocket - 420 - 44 Tooth 41201118-000-44
PARTS UNLIMITED
$28.51A worn or damaged rear sprocket directly impacts your bike's acceleration, top-end performance, and overall drivetrain efficiency. This OEM-spec replacement ensures you're running the exact geometry and tooth profile your Honda was engineered for,...K223506- SKU:
- K223506
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- CHAIN SIZE:
- 420
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 44
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$28.51 -
PARTS UNLIMITED Rear Yamaha Sprocket - 520 - 51 Tooth CT243-51S
PARTS UNLIMITED
$54.01A worn or damaged rear sprocket kills acceleration and creates drivetrain inefficiency—you'll feel the difference immediately in throttle response and overall performance. This OEM-spec rear sprocket restores precise engagement with your chain, ensuring...K223604G- SKU:
- K223604G
- Availability:
- Ships Same Business Day
- Weight:
- 3.50 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
$54.01 -
PARTS UNLIMITED Countershaft Sprocket - 12-Tooth 23800041-010-12
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 compromises acceleration and throttle...K222501- SKU:
- K222501
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 420
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 12
$7.09Qty in Cart: 0Quantity:Price:$7.09Subtotal: -
PARTS UNLIMITED Single Bearing - 20 x 47 x 14 6204-2RS
PARTS UNLIMITED
$7.72A precision bearing is fundamental to any high-performance rotating assembly, and this sealed unit eliminates maintenance headaches while delivering consistent radial and axial load support. Whether you're rebuilding a supercharger, electric motor, or...62042RS- SKU:
- 62042RS
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- INSIDE DIAMETER:
- 20 MM
- OUTSIDE DIAMETER:
- 47 MM
- TYPE:
- DOUBLE SEAL
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- STYLE:
- SMOOTH
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- 14 MM
- UNITS:
- EACH
$7.72 -
MOOSE RACING Kickstarter 80-0345-00-60
MOOSE RACING
$184.79A reliable kickstarter bracket is foundational to any build—cheap imitations fail under stress, leaving you stranded. The MOOSE RACING Kickstarter bracket delivers OEM-equivalent construction with zinc-coated, corrosion-resistant hardware that handles...11120112- SKU:
- 11120112
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- MATERIAL:
- 6061 ALUMINUM
- PRODUCT NAME:
- KICKSTARTER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$184.79
