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
-
Renthal 52T Green Rear Sprocket for Kawasaki 520 Chain 112U-520-52GEGN
RENTHAL
$104.61A worn or mismatched rear sprocket robs your Kawasaki of power transfer efficiency and accelerates chain wear across your entire drivetrain. The Renthal 52T Green Rear Sprocket delivers precision-engineered performance through CNC-machined 7075-T6...12111674- SKU:
- 12111674
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- TOOTH COUNT:
- 52
- TYPE:
- DRIVE
- COLOR/FINISH:
- GREEN
- PRODUCT NAME:
- SPROCKET
$104.61Qty in Cart: 0Quantity:Price:$104.61Subtotal: -
Renthal Green 53-Tooth Rear Sprocket for Kawasaki 112U-520-53GEGN
RENTHAL
$104.61If you're running a 520 chain setup on your Kawasaki and want measurable improvements in acceleration and handling, the Renthal Green 53-Tooth Rear Sprocket delivers real performance gains through intelligent engineering. The 7075-T6 aluminum...12111675- SKU:
- 12111675
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 53
- COLOR/FINISH:
- GREEN
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TYPE:
- DRIVE
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$104.61Qty in Cart: 0Quantity:Price:$104.61Subtotal: -
Renthal Green 49-Tooth Aluminum Rear Sprocket for Kawasaki 191U-420-49GEGN
RENTHAL
$104.61Shaving 66% of rotating mass off your rear sprocket transforms acceleration and handling without sacrificing strength—critical when every millisecond counts. The self-cleaning mud grooves keep your chain engaged and wear to a minimum, even in harsh...12111678- SKU:
- 12111678
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- GREEN
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
$104.61 -
Renthal Green 50-Tooth Aluminum Rear Sprocket for Kawasaki KX80G 1986-1987 191U-420-50GEGN
RENTHAL
$104.61If you're running a KX80G and want measurable improvements in acceleration and throttle response, switching to a lightweight aluminum sprocket is one of the highest-impact upgrades you can make. The Renthal 50-Tooth delivers the durability of premium...12111679- SKU:
- 12111679
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- COLOR/FINISH:
- GREEN
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
$104.61 -
Renthal 51-Tooth Green Rear Sprocket for Kawasaki 191U-420-51GEGN
RENTHAL
$104.61A lightweight rear sprocket is fundamental to improving your Kawasaki's acceleration and overall handling dynamics. The Renthal 51-Tooth Green Rear Sprocket cuts weight by approximately 66% compared to steel alternatives, translating to noticeable gains...12111680- SKU:
- 12111680
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- GREEN
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
$104.61Qty in Cart: 0Quantity:Price:$104.61Subtotal: -
Renthal Green 52-Tooth Aluminum Sprocket for Kawasaki KX100 191U-420-52GEGN
RENTHAL
$104.61Unsprung weight is the enemy of handling and acceleration—every gram counts in competitive riding. The Renthal Green 52-Tooth Aluminum Sprocket cuts approximately 66% off the mass of a steel alternative while maintaining the strength of 7075-T6 alloy,...12111681- SKU:
- 12111681
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- GREEN
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 52
$104.61 -
Renthal 46-Tooth Green Rear Sprocket for Kawasaki KX65 408U-420-46GEGN
RENTHAL
$104.61If you're running a KX65, sprocket wear directly impacts acceleration response and chain longevity—and mud buildup accelerates both. The Renthal 46-Tooth Rear Sprocket eliminates this problem with CNC-machined self-cleaning grooves and lightweight...12111682- SKU:
- 12111682
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- CHAIN SIZE:
- 420
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- GREEN
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 46
- TYPE:
- DRIVE
$104.61 -
Renthal 47-Tooth Rear Sprocket for Kawasaki KX65 Green 408U-420-47GEGN
RENTHAL
$104.61Lightweight aluminum construction combined with self-cleaning mud grooves means your KX65 delivers consistent power transfer without the weight penalty of steel. If you're serious about reducing unsprung mass and extending drivetrain life on technical...12111683- SKU:
- 12111683
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- CHAIN SIZE:
- 420
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- TYPE:
- DRIVE
- COLOR/FINISH:
- GREEN
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
$104.61 -
Renthal Ultralight Rear Sprocket 48T Green 408U-420-48GEGN
RENTHAL
$104.61If you're running a 420 chain setup on your Kawasaki, sprocket wear directly impacts acceleration response and chain longevity. The Renthal Ultralight 48T replaces worn teeth with precision-engineered geometry while saving rotational mass—a critical...12111684- SKU:
- 12111684
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- CHAIN SIZE:
- 420
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- GREEN
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
$104.61Qty in Cart: 0Quantity:Price:$104.61Subtotal: -
Renthal 49-Tooth Green Aluminum Rear Sprocket for Kawasaki KX65 408U-420-49GEGN
RENTHAL
$104.61The Renthal 49-Tooth Green Aluminum Rear Sprocket delivers measurable performance gains for your Kawasaki KX65. By cutting weight by 66% compared to steel alternatives, you'll experience faster acceleration, reduced rotational mass, and improved handling...12111685- SKU:
- 12111685
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- GREEN
- TOOTH COUNT:
- 49
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 420
- UNITS:
- EACH
$104.61 -
Renthal 50-Tooth Green Rear Sprocket for Kawasaki KX65 408U-420-50GEGN
RENTHAL
$104.61If you're running a Kawasaki KX65 in competitive or recreational off-road conditions, sprocket wear directly impacts your power delivery and acceleration. The Renthal 50-Tooth Green Sprocket replaces worn or damaged stock units with a...12111686- SKU:
- 12111686
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- GREEN
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 420
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
$104.61 -
Renthal Rear Sprocket 50T 520 Chain Husqvarna 216U-520-50GPSI
RENTHAL
$99.82If you're running a 520 chain on your Husqvarna, sprocket weight directly impacts acceleration and rotational inertia—and this 50T rear sprocket cuts that mass by 66% compared to steel without sacrificing strength. Built from 7075-T6 aluminum and...12111142- SKU:
- 12111142
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
$99.82 -
Renthal Rear Sprocket 51T 520 Chain Silver 216U-520-51GPSI
RENTHAL
$99.82If you're running a Husqvarna dirt bike and want measurable gains in acceleration without sacrificing durability, this 51-tooth rear sprocket delivers exactly that. By cutting 66% of the weight compared to steel alternatives, you'll feel the difference...12111143- SKU:
- 12111143
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
$99.82 -
Renthal Twinring Rear Sprocket 48T Blue 520 Chain 2240-520-48GPBU
RENTHAL
$149.98If you're running a 520 chain setup and demand sprocket longevity without the weight penalty, the Renthal Twinring delivers a proven solution used by competitive riders and serious enthusiasts. The hybrid aluminum-steel construction outlasts conventional...12101136- SKU:
- 12101136
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
$149.98 -
Renthal TwinRing Rear Sprocket 50T Blue 520 Chain 2240-520-50GPBU
RENTHAL
$149.98Rear sprocket durability directly impacts acceleration response and chain life—cheap alternatives wear out in half the time and cost you races. The Renthal TwinRing solves this with a hybrid construction that combines the weight savings of aluminum with...12101137- SKU:
- 12101137
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
$149.98 -
Renthal Twinring Rear Sprocket 49-Tooth Green 520 Chain 112052049GPGN
RENTHAL
$149.98If you're running a 520 chain setup, your sprocket choice directly impacts acceleration response, chain longevity, and overall drivetrain reliability. The Renthal Twinring 49-tooth rear sprocket eliminates the traditional trade-off between weight and...12101139- SKU:
- 12101139
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- GREEN
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$149.98 -
Renthal Twinring Rear Sprocket 51T Green 112052051GPGN
RENTHAL
$149.98If you're running a 520 chain on dirt or adventure terrain, sprocket wear directly impacts your power delivery and chain life. The Renthal Twinring 51T combines a lightweight aluminum core with a steel outer ring, delivering the durability of all-steel...12101141- SKU:
- 12101141
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- COLOR/FINISH:
- GREEN
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
$149.98 -
Renthal Ultralight Rear Sprocket 50T Silver 131U-520-50GBSI
RENTHAL
$99.82Shaving unsprung weight off your Yamaha directly improves handling responsiveness and acceleration—the Renthal Ultralight 50T rear sprocket delivers a measurable advantage in both stock and modified builds. At 66% lighter than steel without sacrificing...R13150- SKU:
- R13150
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 50
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
$99.82 -
Renthal 49-Tooth Rear Sprocket for Yamaha 520 Chain 150U-520-49GBSI
RENTHAL
$99.82A rear sprocket is one of the highest-wear drivetrain components on any bike—constant chain engagement and mud exposure demand a part that can handle punishment without adding rotational mass. The Renthal 49-tooth rear sprocket delivers that balance with...R150A52049- SKU:
- R150A52049
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 49
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TYPE:
- DRIVE
- UNITS:
- EACH
$99.82 -
Renthal 51-Tooth Rear Sprocket for Yamaha 150U-520-51GBSI
RENTHAL
$99.82A lighter rear sprocket directly improves acceleration, handling, and unsprung weight—critical factors whether you're racing on track or tackling technical terrain. The Renthal 51-tooth sprocket combines 7075-T6 aluminum construction with CNC-machined...R150A52051- SKU:
- R150A52051
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- TYPE:
- DRIVE
$99.82
