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 50-Tooth Rear Sprocket for Suzuki 123U-520-50GYSI
RENTHAL
$99.82Shaving 66% off your stock sprocket's weight directly translates to sharper acceleration and more responsive handling—critical advantages whether you're racing competitively or pushing hard on technical terrain. The 7075-T6 aluminum construction...R12350- SKU:
- R12350
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$99.82 -
Renthal 47-Tooth Rear Sprocket for Kawasaki 420 Chain Silver 408U-420-47GESI
RENTHAL
$99.82If you're running a Kawasaki 420 chain setup and want measurable gains in acceleration and reduced rotational mass, this 47-tooth rear sprocket is a direct path to both. By swapping steel for 7075-T6 aluminum, you'll shed approximately 66% of the...R408U42047- SKU:
- R408U42047
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
- CHAIN SIZE:
- 420
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
$99.82 -
Renthal Ultralight Rear Sprocket 47T 420 Chain Silver 121U-420-47GBSI
RENTHAL
$99.82If you're running a Yamaha YZ65 and serious about shaving rotational mass, this Renthal ultralight rear sprocket delivers measurable gains in acceleration and throttle response. The 7075-T6 aluminum construction cuts weight by approximately 66% compared...12112061- SKU:
- 12112061
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- CHAIN SIZE:
- 420
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 47
- UNITS:
- EACH
- COLOR/FINISH:
- SILVER
- TYPE:
- DRIVE
$99.82 -
Renthal 46T Orange Rear Sprocket 192U-420-46GPOR
RENTHAL
$104.61If you're pushing your off-road bike to the limit, sprocket wear directly impacts your acceleration, handling, and reliability on the track or trail. The Renthal 46T Orange Rear Sprocket delivers the durability and lightweight performance you need to...12112465- SKU:
- 12112465
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 46
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
$104.61 -
Renthal 48T Rear Sprocket Orange 420 Chain KTM 65 SX 192U-420-48GPOR
RENTHAL
$104.61The Renthal 48T Rear Sprocket cuts unsprung weight without sacrificing durability, directly improving your KTM 65 SX's acceleration and handling response. Its CNC-machined 7075-T6 aluminum construction with self-cleaning mud grooves maintains consistent...12112467- SKU:
- 12112467
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
$104.61 -
Renthal 50-Tooth Rear Sprocket 420 Chain 192U-420-50GPOR
RENTHAL
$104.61If you're running a 65cc off-road bike, sprocket wear directly impacts acceleration, top-end speed, and overall drivetrain efficiency. The Renthal 50-Tooth Rear Sprocket cuts unnecessary weight while the CNC-machined 7075-T6 aluminum construction...12112468- SKU:
- 12112468
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 50
- MOUNTING POSITION:
- REAR
$104.61 -
Renthal 47-Tooth Rear Sprocket Orange 224U-520-47GPOR
RENTHAL
$104.61If you're running a 520 chain on your off-road bike or ATV, sprocket wear directly impacts acceleration, chain longevity, and overall drivetrain reliability. The Renthal 47-tooth rear sprocket delivers the durability and lightweight performance you need...12112473- SKU:
- 12112473
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 47
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- UNITS:
- EACH
$104.61 -
Renthal Ultralight Grooved Rear Sprocket 49 Teeth Orange 224U-520-49GPOR
RENTHAL
$104.61If you're running a 520 chain setup and want to cut unsprung weight without sacrificing durability, the Renthal Ultralight Grooved Rear Sprocket is engineered to deliver. At 66% lighter than steel, this 49-tooth sprocket reduces rotational mass for...12112475- SKU:
- 12112475
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 49
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- STREET
$104.61 -
Renthal 46T Rear Sprocket Orange 428 Chain Husqvarna TC85 441U-428-46GPOR
RENTHAL
$104.61Mud buildup and unsprung weight are the enemies of off-road traction and acceleration—especially in motocross and supercross conditions. The Renthal 46T Rear Sprocket eliminates both with CNC-machined self-cleaning grooves and 7075-T6 aluminum...12112482- SKU:
- 12112482
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 46
- UNITS:
- EACH
- TYPE:
- DRIVE
$104.61 -
Renthal 47-Tooth Rear Sprocket for 428 Chain Gas Gas Husqvarna KTM Orange 441U-428-47GPOR
RENTHAL
$104.61A worn or undersized rear sprocket kills acceleration and forces your engine to work harder than it should. The Renthal 47-Tooth Rear Sprocket delivers the right gearing for off-road performance while cutting unsprung weight by 66% compared to...12112483- SKU:
- 12112483
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- TOOTH COUNT:
- 47
- UNITS:
- EACH
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
$104.61 -
Renthal Rear Sprocket 48T 428 Chain Orange 441U-428-48GPOR
RENTHAL
$104.61If you're running serious off-road miles, your sprocket needs to handle mud, dirt, and impact without becoming a liability. The Renthal 48T rear sprocket cuts unsprung weight by 66% compared to steel, translating directly to faster acceleration and...12112484- SKU:
- 12112484
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
$104.61 -
Renthal Ultralight Rear Sprocket 49T 428 Chain Pitch Orange 441U-428-49GPOR
RENTHAL
$104.61If you're running a 428 chain setup on your off-road bike, sprocket weight directly impacts acceleration and overall handling—and this Renthal ultralight saves you nearly two-thirds the mass of steel without sacrificing durability. The CNC-machined mud...12112485- SKU:
- 12112485
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 49
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
$104.61 -
Renthal Rear Sprocket 40T Orange 415 Chain 491-415-40P-OR
RENTHAL
$104.61Shaving 66% of weight from your rear sprocket directly improves acceleration, reduces rotational inertia, and enhances overall handling—especially critical for off-road and track applications where every gram counts. Renthal's 7075-T6 aluminum...12112491- SKU:
- 12112491
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- TOOTH COUNT:
- 40
- UNITS:
- EACH
- CHAIN SIZE:
- 415
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
$104.61 -
Renthal 48-Tooth Black Rear Sprocket for Honda 154U-520-48GRBK
RENTHAL
$99.82If you're running a 520 chain setup on your Honda, sprocket weight directly impacts your bike's acceleration and rotational inertia—and this Renthal 48-tooth hits the sweet spot between durability and lightweight performance. At 66% lighter than steel...12110030- SKU:
- 12110030
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$99.82 -
Renthal 51-Tooth Black Rear Sprocket for KTM 224U-520-51GPBK
RENTHAL
$99.82If you're running a KTM off-road machine, sprocket wear directly impacts acceleration, chain life, and overall drivetrain efficiency. The Renthal 51-tooth rear sprocket replaces worn or damaged stock components with precision-engineered durability, while...12110048- SKU:
- 12110048
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
$99.82 -
Renthal 48-Tooth Rear Sprocket for Honda 154U-520-48GRSI
RENTHAL
$99.82If you're running a Honda dirt bike or motocross machine, rear sprocket selection directly impacts your acceleration, top-end speed, and overall throttle response. The Renthal 48-Tooth Rear Sprocket delivers a measurable weight savings—66% lighter than...R15448- SKU:
- R15448
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- CHAIN SIZE:
- 520
- TYPE:
- DRIVE
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- UNITS:
- EACH
$99.82 -
Renthal 51-Tooth Rear Sprocket for Kawasaki 112U-520-51GESI
RENTHAL
$99.82If you're running a 520 chain setup on your Kawasaki dirt bike, sprocket weight matters more than most riders realize—a lighter rear sprocket directly reduces unsprung mass, improves throttle response, and decreases rotational inertia for snappier...R112B51- SKU:
- R112B51
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
$99.82 -
Renthal Rear Sprocket 51 Tooth Black 520 Chain for Suzuki 123U-520-51GYBK
RENTHAL
$99.82A lightweight rear sprocket is fundamental to unlocking your Suzuki's acceleration and handling potential—especially if you're running aggressive terrain or looking to reduce unsprung weight. The Renthal 51-Tooth Rear Sprocket delivers the durability of...12110023- SKU:
- 12110023
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
$99.82 -
Renthal 50T Rear Sprocket Orange 224U-520-50GPOR
RENTHAL
$104.61If you're running a 520 chain setup and pushing your bike hard on the track or trail, sprocket weight directly impacts your bike's acceleration and rotational inertia. The Renthal 50T delivers a significant 66% weight savings over steel without...12112476- SKU:
- 12112476
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 50
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
$104.61Qty in Cart: 0Quantity:Price:$104.61Subtotal: -
Renthal 48-Tooth Rear Sprocket for Yamaha 520 Chain 150U-520-48GBSI
RENTHAL
$99.82Rotational mass directly impacts throttle response and acceleration—swap your heavy steel sprocket for Renthal's 7075-T6 aluminum design and feel the difference immediately. Built for mud-heavy terrain, the self-cleaning tooth grooves eliminate buildup...R150A52048- SKU:
- R150A52048
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 48
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TYPE:
- DRIVE
$99.82
