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 Countershaft Sprocket - 13-Tooth 13144-053
PARTS UNLIMITED
$8.11A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to costly secondary failures. This 13-tooth replacement restores precise power delivery and engagement to your stock specifications, eliminating slack...K222711- SKU:
- K222711
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 428
- TOOTH COUNT:
- 13
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
$8.11 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 13144-1005
PARTS UNLIMITED
$12.19A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to costly chain slippage or premature wear. The PARTS UNLIMITED 14-Tooth Countershaft Sprocket restores OEM-spec performance with precision-machined...K222740- SKU:
- K222740
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 14
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
$12.19 -
PARTS UNLIMITED Countershaft Sprocket - 14-Tooth 13144-1022
PARTS UNLIMITED
$8.11A worn countershaft sprocket directly compromises your bike's power delivery and acceleration response. This OEM-spec replacement restores factory performance while the hardened steel construction ensures reliable durability through thousands of shift...K222742- SKU:
- K222742
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 420
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 14
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
$8.11 -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 13144-1023
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket compromises your entire drivetrain's efficiency and can lead to chain slippage, poor acceleration, and premature wear on downstream components. This OEM-specification 13-tooth sprocket restores precise engagement...K222747- SKU:
- K222747
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 420
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- PRODUCT NAME:
- SPROCKET
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 15-Tooth 13144-1024
PARTS UNLIMITED
$7.09A worn or damaged countershaft sprocket directly impacts throttle response, chain engagement, and overall drivetrain efficiency. This PARTS UNLIMITED 15-tooth sprocket restores OEM-specification performance while delivering the durability needed for...K222748- SKU:
- K222748
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- RAW
- TOOTH COUNT:
- 15
- RIDING STYLE:
- STREET
- CHAIN SIZE:
- 420
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$7.09 -
PARTS UNLIMITED Countershaft Sprocket - 13-Tooth 13144-1027
PARTS UNLIMITED
$13.21Your countershaft sprocket is the critical link between your engine and transmission—wear or damage here directly impacts power delivery and shifting precision. This OEM-spec replacement restores factory performance without compromise, ensuring...K222765- SKU:
- K222765
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- TOOTH COUNT:
- 13
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
$13.21 -
PARTS UNLIMITED Rear Honda Sprocket - 520 - 49 Tooth 41201-430-810
PARTS UNLIMITED
$45.85A worn or damaged rear sprocket compromises your entire drivetrain's efficiency and can leave you stranded mid-race or ride. This PARTS UNLIMITED 49-tooth rear sprocket restores OEM-spec performance with precision-machined teeth and splines that engage...K223501J- SKU:
- K223501J
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- TYPE:
- DRIVE
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- NATURAL
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
$45.85 -
PARTS UNLIMITED Rear Honda Sprocket - 520 - 41 Tooth 41201-MG2-000
PARTS UNLIMITED
$41.77A worn or damaged sprocket directly compromises your drivetrain's efficiency, power transfer, and chain longevity. This OEM-spec rear sprocket delivers the precision fitment and durability your Honda demands, whether you're pushing lap times or keeping a...K223501L- SKU:
- K223501L
- Availability:
- Ships Same Business Day
- Weight:
- 1.63 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 41
- UNITS:
- EACH
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
$41.77 -
PARTS UNLIMITED Rear Honda Sprocket - 428 - 50 Tooth 41200-427-670
PARTS UNLIMITED
$30.55A worn or damaged rear sprocket directly compromises your acceleration, top-end performance, and chain longevity. This PARTS UNLIMITED 50-tooth rear sprocket restores OEM-exact engagement with your chain, eliminating slack and ensuring precise power...K223501Z- SKU:
- K223501Z
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 428
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$30.55Qty in Cart: 0Quantity:Price:$30.55Subtotal: -
PARTS UNLIMITED Rear Honda Sprocket - 520 - 54 Tooth 41205-KA4-701
PARTS UNLIMITED
$44.83A worn or damaged rear sprocket compromises your entire drivetrain's efficiency, creating power loss and unpredictable handling on the track or road. This OEM-spec replacement sprocket restores precise engagement with your chain, ensuring consistent...K223502K- SKU:
- K223502K
- Availability:
- Ships Same Business Day
- Weight:
- 2.88 LBS
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TOOTH COUNT:
- 54
- TYPE:
- DRIVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
$44.83 -
PARTS UNLIMITED Rear Honda Sprocket - 420 - 47 Tooth 41201-GC4-000
PARTS UNLIMITED
$26.47A worn or damaged sprocket directly impacts your drivetrain's efficiency, throttle response, and chain longevity. This OEM-spec rear sprocket restores precise engagement with your chain, eliminating slack and ensuring consistent power delivery whether...K223502P- SKU:
- K223502P
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
$26.47 -
PARTS UNLIMITED Rear Honda Sprocket - 520 - 51 Tooth 41201-KA3-710
PARTS UNLIMITED
$47.43A worn or damaged rear sprocket directly impacts your power delivery, acceleration response, and overall drivetrain efficiency. This OEM-spec replacement restores precise chain engagement and eliminates the noise, vibration, and performance loss that...K223502S- SKU:
- K223502S
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- DRIVE
- UNITS:
- EACH
$47.43 -
PARTS UNLIMITED Rear Honda Sprocket - 520 - 50 Tooth 41201KG0000-50T
PARTS UNLIMITED
$44.83A worn or damaged rear sprocket compromises your entire drivetrain's efficiency, causing poor acceleration, increased wear on your chain, and unpredictable power delivery. This OEM-spec replacement restores precision engagement between chain and...K223502V- SKU:
- K223502V
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- NATURAL
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- TYPE:
- DRIVE
$44.83Qty in Cart: 0Quantity:Price:$44.83Subtotal: -
PARTS UNLIMITED Rear Honda Sprocket - 520 - 42 Tooth 41201KFO000-42T
PARTS UNLIMITED
$30.55A worn or damaged rear sprocket compromises your power delivery and shifts feel sloppy—exactly what you don't want on the track or trail. This OEM-spec 42-tooth rear sprocket restores precise engagement with your chain, ensuring crisp acceleration and...K223503B- SKU:
- K223503B
- Availability:
- Ships Same Business Day
- Weight:
- 1.63 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 42
- COLOR/FINISH:
- NATURAL
- TYPE:
- DRIVE
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
$30.55 -
PARTS UNLIMITED Rear Honda Sprocket - 520 - 48 Tooth 41201-MG3-000
PARTS UNLIMITED
$47.89A worn or damaged rear sprocket directly impacts your Honda's acceleration, top-end performance, and overall drivetrain efficiency. This OEM-spec sprocket restores precise chain engagement and eliminates the power loss and noise that come with a degraded...K223503D- SKU:
- K223503D
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
$47.89 -
PARTS UNLIMITED Rear Honda Sprocket - 420 - 49 Tooth 41201-6C4-830
PARTS UNLIMITED
$30.55A worn or damaged rear sprocket kills your acceleration and forces your engine to work harder than it should. This OEM-spec 49-tooth rear sprocket restores precise chain engagement and efficient power delivery, whether you're running stock gearing or...K223504B- SKU:
- K223504B
- Availability:
- Ships Same Business Day
- Weight:
- 1.56 LBS
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$30.55 -
PARTS UNLIMITED Rear Honda Sprocket - 420 - 48 Tooth 41201-329-000
PARTS UNLIMITED
$47.89A worn or damaged rear sprocket will degrade throttle response, create chain wear, and compromise power delivery to your rear wheel. This OEM-spec replacement restores factory performance and ensures precise engagement with your chain for smooth,...K223558- SKU:
- K223558
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$47.89 -
PARTS UNLIMITED Rear Honda Sprocket - 428 - 44 Tooth 41201-110-670
PARTS UNLIMITED
$26.47A worn or damaged sprocket directly impacts chain wear, power delivery, and fuel efficiency—making it one of the highest-ROI maintenance items on your Honda. This OEM-specification rear sprocket restores factory performance characteristics without...K223566- SKU:
- K223566
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 44
- TYPE:
- DRIVE
$26.47 -
PARTS UNLIMITED Rear Honda Sprocket - 428 - 45 Tooth 41201-053-020
PARTS UNLIMITED
$25.45A worn or damaged rear sprocket will degrade acceleration response and create unnecessary drivetrain slack—compromising both performance and chain longevity. This OEM-spec replacement sprocket restores precise engagement and eliminates play, ensuring...K223567- SKU:
- K223567
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 45
- TYPE:
- DRIVE
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
$25.45 -
PARTS UNLIMITED Rear Honda Sprocket - 420 - 36 Tooth 41200-152-000
PARTS UNLIMITED
$27.49A worn or damaged rear sprocket directly impacts your Honda's acceleration, chain wear, and overall drivetrain efficiency. This OEM-spec replacement ensures precise engagement with your chain while maintaining factory performance characteristics. Whether...K223584- SKU:
- K223584
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- RIDING STYLE:
- ATV
- TOOTH COUNT:
- 36
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- CHAIN SIZE:
- 420
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- SPROCKET
$27.49
