Dirt Bike Rear Sprockets
Dirt Bike Rear Sprockets for Honda, KTM, Beta & Husqvarna: 42-51 Tooth Steel & Aluminum at JJ Motorsports
Customize your dirt bike's gearing for optimal acceleration or top speed with premium rear sprockets from JJ Motorsports, precision-machined for perfect chain fit, reduced weight, and extreme durability in motocross, enduro, and trail riding. Our selection includes high-tensile steel and lightweight aluminum sprockets in 42-51 tooth counts designed for smoother power transfer, less rotational mass, and customizable ratios to match terrain or riding style. Compatible with top models like Honda CRF, KTM SX/EXC, Beta RR, Husqvarna FC/FE, and more, these race-proven sprockets from trusted brands ensure minimal chain wear, reliable performance, and longevity in muddy, rocky, or high-speed conditions. From JT Sprockets' computer-optimized steel for OEM reliability to Renthal's ultralight aluminum for racing gains, dial in your final drive for tighter woods, faster tracks, or balanced trails with the ideal tooth count.
Shop brands like JT Sprockets, Moose Racing, and Renthal for world-class quality. Explore related categories such as dirt bike front sprockets for full gearing kits or dirt bike drive chains for complete drivetrain upgrades.
Top Dirt Bike Rear Sprockets
- JT Sprockets Steel Rear Sprocket Graphite 48 Tooth JTX251.48GR – 48-tooth hardened steel rear sprocket with graphite finish; computer-designed for perfect chain alignment and durability in off-road conditions.
- JT Sprockets Rear Sprocket Beta/Honda Red 51 Tooth JTA210.51RED – Lightweight aluminum 51-tooth sprocket in red anodized finish for Beta RR and Honda CRF models; reduces unsprung weight for better acceleration.
- Moose Offroad Steel Rear Sprocket 48 Tooth 1210-BET-48-STL – Heavy-duty steel 48-tooth sprocket for Beta models; heat-treated for extreme strength and wear resistance in aggressive off-road use.
- Renthal Rear Sprocket Aluminum 42 Tooth Gas Gas/Husaberg/Husqvarna/KTM 224U-520-42GPSI – Ultralight CNC-machined aluminum 42-tooth sprocket with gold finish; precision engineering for KTM, Husqvarna, and Gas Gas models, ideal for racing.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
PARTS UNLIMITED Rear Honda Sprocket - 420 - 44 Tooth 41201118-000-44
PARTS UNLIMITED
$29.63A 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...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
$29.63 -
PARTS UNLIMITED Rear Yamaha Sprocket - 520 - 51 Tooth CT243-51S
PARTS UNLIMITED
$56.13A 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...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
$56.13 -
PARTS UNLIMITED Rear Yamaha Sprocket - 54 Tooth 5HP-25454-20-54
PARTS UNLIMITED
$32.81A worn or damaged rear sprocket directly impacts your power delivery, throttle response, and overall drivetrain efficiency. This OEM-spec replacement restores your Yamaha to factory performance...12100032- SKU:
- 12100032
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
- CHAIN SIZE:
- 428
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- TOOTH COUNT:
- 54
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$32.81 -
PARTS UNLIMITED Rear Yamaha Sprocket - 49 Tooth 5FC-25449-20-49
PARTS UNLIMITED
$26.45A worn or damaged sprocket directly impacts chain wear, power delivery, and overall drivetrain efficiency on your Yamaha. The PARTS UNLIMITED Rear Sprocket ensures OEM-matching performance with...12100033- SKU:
- 12100033
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- CHAIN SIZE:
- 428
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$26.45 -
On Sale
VORTEX Aluminum Sprocket - Silver - Rear - 36 Tooth 206-36
VORTEX
MSRP: $59.95Now: $50.96Was: $59.95A rear sprocket is fundamental to your drivetrain's efficiency and longevity. The VORTEX 36-tooth aluminum design delivers reliable power transfer while resisting wear, letting you push harder...12111714- SKU:
- 12111714
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 420
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 36
- UNITS:
- EACH
- COLOR/FINISH:
- SILVER
- TYPE:
- DRIVE
MSRP: $59.95Now: $50.96Was: $59.95Qty in Cart: 0Quantity:Price:MSRP: $59.95Now: $50.96Was: $59.95Subtotal: -
On Sale
VORTEX Aluminum Sprocket - Silver - Rear - 37-Tooth 206-37
VORTEX
MSRP: $59.95Now: $50.96Was: $59.95A properly matched rear sprocket is critical for maintaining optimal chain tension, gear ratio performance, and powertrain longevity. The VORTEX 37-Tooth Aluminum Sprocket delivers precision...12111715- SKU:
- 12111715
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- SILVER
- TYPE:
- DRIVE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 37
- UNITS:
- EACH
- CHAIN SIZE:
- 420
MSRP: $59.95Now: $50.96Was: $59.95 -
On Sale
VORTEX Aluminum Sprocket - Silver - Rear - 33-Tooth 206-33
VORTEX
MSRP: $59.95Now: $50.96Was: $59.95A worn or mismatched sprocket will kill your acceleration and put unnecessary stress on your chain and engine. The VORTEX Aluminum Sprocket delivers precision tooth geometry that reduces wear,...12111711- SKU:
- 12111711
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TOOTH COUNT:
- 33
- TYPE:
- DRIVE
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- SILVER
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
MSRP: $59.95Now: $50.96Was: $59.95Qty in Cart: 0Quantity:Price:MSRP: $59.95Now: $50.96Was: $59.95Subtotal: -
PARTS UNLIMITED Rear Honda Sprocket - 420 - 46 Tooth H01-GN1-000
PARTS UNLIMITED
$30.69A worn or damaged rear sprocket directly impacts your Honda's acceleration response and overall drivetrain efficiency. This OEM-specification 46-tooth 420 sprocket restores factory performance...K223504M- SKU:
- K223504M
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 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:
- 46
$30.69 -
PARTS UNLIMITED Rear Honda Sprocket - 420 - 36 Tooth 41201-GEL-70036
PARTS UNLIMITED
$19.03A worn or damaged rear sprocket directly impacts power delivery, acceleration, and drivetrain longevity on your Honda. This OEM-spec replacement ensures precise chain engagement and maintains the...12100370- SKU:
- 12100370
- Availability:
- Ships Same Business Day
- Weight:
- 0.92 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 36
- UNITS:
- EACH
$19.03Qty in Cart: 0Quantity:Price:$19.03Subtotal: -
PARTS UNLIMITED Rear Honda Sprocket - 428 - 48 Tooth 41201-KN4-000
PARTS UNLIMITED
$28.57A worn or damaged rear sprocket directly impacts your engine's power delivery and acceleration consistency—making this OEM-spec replacement essential for maintaining peak drivetrain performance...K223504P- SKU:
- K223504P
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
- CHAIN SIZE:
- 428
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
$28.57 -
PARTS UNLIMITED Rear Honda Sprocket - 428 - 50 Tooth 41201-KN4-00050
PARTS UNLIMITED
$31.75A worn or damaged rear sprocket compromises your power delivery and creates inconsistent acceleration—exactly what you can't afford in racing or performance riding. This OEM-spec replacement restores...K223504Q- SKU:
- K223504Q
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- UNITS:
- EACH
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
$31.75 -
PARTS UNLIMITED Rear Honda Sprocket - 428 - 52 Tooth 41201KN4000-52T
PARTS UNLIMITED
$33.87A worn or damaged rear sprocket compromises your entire drivetrain's efficiency and can lead to costly chain wear or transmission issues. This OEM-spec 52-tooth rear sprocket restores proper gear...K223504R- SKU:
- K223504R
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TOOTH COUNT:
- 52
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
$33.87Qty in Cart: 0Quantity:Price:$33.87Subtotal: -
PARTS UNLIMITED Rear Honda Sprocket - 520 - 59 Tooth 41202-KS6-830SR
PARTS UNLIMITED
$46.59A worn or damaged rear sprocket compromises your entire drivetrain's efficiency, reducing acceleration and straining your clutch and chain. This OEM-specification replacement restores precise...K223504U- SKU:
- K223504U
- Availability:
- Ships Same Business Day
- Weight:
- 2.69 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
$46.59 -
PARTS UNLIMITED Rear Honda Sprocket - 428 - 49 Tooth 41201942-000-49
PARTS UNLIMITED
$30.69A worn or damaged sprocket compromises your entire drivetrain's efficiency, leading to power loss, chain wear, and potential catastrophic failure. This OEM-specification rear sprocket restores...K223513- SKU:
- K223513
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- CHAIN SIZE:
- 428
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- STEEL
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$30.69 -
PARTS UNLIMITED Rear Honda Sprocket - 428 - 45 Tooth 41201-459-670
PARTS UNLIMITED
$32.81A worn or damaged rear sprocket directly impacts your Honda's acceleration, top speed, and overall drivetrain efficiency. This OEM-specification 45-tooth rear sprocket restores precise chain...K223518- SKU:
- K223518
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 45
- UNITS:
- EACH
- COLOR/FINISH:
- NATURAL
- MOUNTING POSITION:
- REAR
$32.81 -
PARTS UNLIMITED Rear Yamaha Sprocket - 520 - 40 Tooth 583-25440-10
PARTS UNLIMITED
$31.75A worn or damaged sprocket directly impacts chain engagement, acceleration response, and overall drivetrain efficiency on your Yamaha. This OEM-spec rear sprocket restores precise tooth geometry and...K223660- SKU:
- K223660
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- DRIVE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 40
- UNITS:
- EACH
$31.75 -
PARTS UNLIMITED Rear Kawasaki Sprocket - 420 - 50 Tooth 42041-1228
PARTS UNLIMITED
$30.69A worn or damaged rear sprocket directly impacts your Kawasaki's acceleration, top-end performance, and drivetrain efficiency. This OEM-spec replacement ensures you're running the exact same geometry...K223701C- SKU:
- K223701C
- Availability:
- Ships Same Business Day
- Weight:
- 1.56 LBS
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- TYPE:
- DRIVE
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 420
- UNITS:
- EACH
$30.69Qty in Cart: 0Quantity:Price:$30.69Subtotal: -
PARTS UNLIMITED Rear Kawasaki Sprocket - 520 - 48 Tooth 42041-1103
PARTS UNLIMITED
$45.53A worn or damaged sprocket compromises chain engagement and accelerates wear across your entire drivetrain—leading to power loss, noise, and premature failure. This PARTS UNLIMITED rear sprocket is...K223701F- SKU:
- K223701F
- Availability:
- Ships Same Business Day
- Weight:
- 2.38 LBS
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- UNITS:
- EACH
$45.53Qty in Cart: 0Quantity:Price:$45.53Subtotal: -
PARTS UNLIMITED Rear Kawasaki Sprocket - 520 - 50 Tooth 42041-1093
PARTS UNLIMITED
$47.65A worn or damaged rear sprocket directly compromises drivetrain efficiency, acceleration response, and overall ride safety. This OEM-specification Kawasaki rear sprocket restores precise chain...K223701G- SKU:
- K223701G
- Availability:
- Ships Same Business Day
- Weight:
- 2.31 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
$47.65 -
PARTS UNLIMITED Rear Kawasaki Sprocket - 520 - 44 Tooth 42041-1191
PARTS UNLIMITED
$34.63A worn or damaged sprocket directly impacts your drivetrain's efficiency, acceleration, and overall power delivery to the rear wheel. This OEM-spec rear sprocket restores factory performance and...K223701K- SKU:
- K223701K
- Availability:
- Ships Same Business Day
- Weight:
- 1.94 LBS
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 44
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
$34.63Qty in Cart: 0Quantity:Price:$34.63Subtotal:
