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
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On Sale
SUPERSPROX Edge Rear Sprocket - Black - 43-Tooth RFA47843BLK
SUPERSPROX
MSRP: $49.95Now: $42.46Was: $49.95If you're running mid-range performance builds or looking to shed rotational mass without breaking the bank, the SUPERSPROX Edge Rear Sprocket delivers measurable weight savings where it counts. A lighter rear sprocket reduces unsprung weight and...12102387- SKU:
- 12102387
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- COLOR/FINISH:
- BLACK
- TOOTH COUNT:
- 43
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- LIGHTWEIGHT
- MODEL:
- EDGE
- COLOR/FINISH:
- ZINC
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
MSRP: $49.95Now: $42.46Was: $49.95 -
On Sale
SUPERSPROX Edge Rear Sprocket - Black - 43-Tooth RFA48043BLK
SUPERSPROX
MSRP: $54.95Now: $46.71Was: $54.95A rear sprocket is one of the highest-wear components on any bike, and choosing the right replacement directly impacts acceleration, fuel efficiency, and drivetrain longevity. The SUPERSPROX Edge Rear Sprocket delivers a measurable weight reduction of...12102389- SKU:
- 12102389
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
- TOOTH COUNT:
- 43
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- STYLE:
- LIGHTWEIGHT
- MODEL:
- EDGE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- ZINC
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
MSRP: $54.95Now: $46.71Was: $54.95 -
On Sale
SUPERSPROX Edge Rear Sprocket - Black - 41-Tooth RFA48641BLK
SUPERSPROX
MSRP: $49.95Now: $42.46Was: $49.95A lighter rear sprocket directly improves your bike's acceleration, reduces unsprung weight, and increases fuel efficiency—all critical factors whether you're chasing lap times or enjoying weekend rides. The SUPERSPROX Edge combines measurable weight...12102391- SKU:
- 12102391
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- LIGHTWEIGHT
- TOOTH COUNT:
- 41
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- ZINC
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- MODEL:
- EDGE
MSRP: $49.95Now: $42.46Was: $49.95 -
On Sale
SUPERSPROX Edge Rear Sprocket - Black - 42-Tooth RFA48642BLK
SUPERSPROX
MSRP: $49.95Now: $42.46Was: $49.95Upgrading your rear sprocket is one of the most direct ways to improve acceleration and reduce unsprung weight on your bike. The SUPERSPROX Edge delivers a meaningful 5–15% weight reduction while maintaining the durability expected from a cost-effective,...12102392- SKU:
- 12102392
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- MODEL:
- EDGE
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- ZINC
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- LIGHTWEIGHT
- TOOTH COUNT:
- 42
MSRP: $49.95Now: $42.46Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.46Was: $49.95Subtotal: -
On Sale
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-427-13-1
SUPERSPROX
MSRP: $24.95Now: $21.21Was: $24.95A worn or undersized countershaft sprocket will bleed power through chain drag and compromise acceleration across the entire RPM range. The SUPERSPROX 13-tooth CST-427-13-1 delivers the durability and efficiency demanded by factory racing teams,...12121370- SKU:
- 12121370
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 13
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- CHAIN SIZE:
- 520
- TYPE:
- COUNTERSHAFT
MSRP: $24.95Now: $21.21Was: $24.95 -
On Sale
SUPERSPROX Stealth Rear Sprocket - 48-Tooth - Gold - Beta RST-8000-48-GLD
SUPERSPROX
MSRP: $119.95Now: $101.96Was: $119.95If you're running a high-displacement bike and want sprocket longevity without the weight penalty, the SUPERSPROX Stealth delivers a rare combination: steel teeth that outlast aluminum by 4x, paired with a 70% lighter aluminum core. This hybrid design...12102032- SKU:
- 12102032
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- CHAIN SIZE:
- 525
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- ALUMINUM
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- GOLD
- UNITS:
- EACH
MSRP: $119.95Now: $101.96Was: $119.95Qty in Cart: 0Quantity:Price:MSRP: $119.95Now: $101.96Was: $119.95Subtotal: -
On Sale
SUPERSPROX Stealth Rear Sprocket - 52-Tooth - Red - Beta RST-8000-52-RED
SUPERSPROX
MSRP: $109.95Now: $93.46Was: $109.95If you're running a high-displacement bike and need sprocket durability without excess rotational mass, the SUPERSPROX Stealth delivers both. Steel teeth outlast aluminum by 4x, while the hybrid aluminum core keeps overall weight down—giving you...12102040- SKU:
- 12102040
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- CHAIN SIZE:
- 525
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 52
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- COLOR/FINISH:
- RED
- UNITS:
- EACH
MSRP: $109.95Now: $93.46Was: $109.95Qty in Cart: 0Quantity:Price:MSRP: $109.95Now: $93.46Was: $109.95Subtotal: -
UFO Chain Slider - Honda CRF450R - Black HO04663-001
UFO
$19.95Chain wear on your CRF450R's swingarm isn't just a cosmetic issue—it's a sign of uncontrolled friction that accelerates component degradation and compromises drivetrain efficiency. The UFO Chain Slider shields your swingarm from direct chain contact,...12310470- SKU:
- 12310470
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- CHAIN SLIDER
- MATERIAL:
- PLASTIC
- TYPE:
- SWINGARM
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$19.95 -
UFO Chain Slider - Honda CRF450R - Red HO04663-070
UFO
$19.95Chain sling and swingarm wear are inevitable on the CRF450R, but premature damage to your swingarm is avoidable. The UFO Chain Slider mounts directly to your swingarm, absorbing the constant friction and impact from chain movement that would otherwise...12310471- SKU:
- 12310471
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COLOR/FINISH:
- RED
- TYPE:
- SWINGARM
- MATERIAL:
- PLASTIC
- PRODUCT NAME:
- CHAIN SLIDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$19.95 -
UFO Chain Slider - Honda CRF450R/RX - Black HO04689-001
UFO
$19.95Chain wear on your swingarm isn't just a cosmetic issue—it's a sign that abrasive contact is compromising structural integrity and shortening component lifespan. The UFO Chain Slider installs directly onto your CRF450R/RX swingarm, absorbing chain...12310820- SKU:
- 12310820
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- CHAIN SLIDER
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- MATERIAL:
- PLASTIC
- TYPE:
- SWINGARM
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
UFO Chain Slider - Husqvarna TC/TE/FC/FE - Black HU03359-001
UFO
$19.95Chain slap against your swingarm isn't just annoying—it's progressive damage that compounds with every ride. The UFO Chain Slider shields your swingarm from abrasion and impact, extending component life and maintaining resale value. Installation takes...12310551- SKU:
- 12310551
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- TYPE:
- SWINGARM
- UNITS:
- EACH
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- CHAIN SLIDER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
UFO Chain Slider - KTM - Black KT04056-001
UFO
$19.95Chain wear on your swingarm is inevitable under aggressive riding conditions, but premature damage doesn't have to be. The UFO Chain Slider shields your swingarm from chain abrasion, extending the service life of your frame and reducing costly repairs...12310574- SKU:
- 12310574
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- CHAIN SLIDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- PLASTIC
- TYPE:
- SWINGARM
$19.95 -
UFO Chain Guide - Kawasaki KX125/250 - Black KA03708001
UFO
$24.95The OEM chain guide on your KX125/250 takes a beating every time you hit the track—worn guides lead to chain derailment, sprocket misalignment, and expensive mid-race failures. This UFO replacement restores proper chain tracking and protection with...123708- SKU:
- 123708
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
$24.95 -
UFO Chain Guide - Yamaha YZ125/250 YZ250F/400F/426F/450F - Black YA03808001
UFO
$24.95A worn or damaged chain guide compromises power delivery and risks catastrophic drivetrain failure on the track or trail. The UFO Chain Guide delivers OEM-spec protection with long-wearing polyurethane construction designed to handle the demands of...123808- SKU:
- 123808
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
$24.95 -
UFO Chain Slider - Yamaha YZ125/250 WR250F/400F/426F/450F YZ250F/426F/450F - Black YA03830001
UFO
$19.95Chain slap against your swingarm is inevitable during aggressive riding, but the damage doesn't have to be. The UFO Chain Slider absorbs impact and abrasion that would otherwise wear through your aluminum swingarm, protecting your frame's structural...123830- SKU:
- 123830
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
$19.95 -
UFO Chain Guide - Yamaha YZ80 - Neutral YA03851-280
UFO
$24.95A worn chain guide compromises both performance and reliability on your YZ80, allowing chain slap and misalignment that accelerates wear on your sprockets and chain. The UFO Chain Guide replaces your OEM unit with a durable polyurethane construction...123851- SKU:
- 123851
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
$24.95 -
UFO Chain Slider - Yamaha YZ85 - Black YA03858-001
UFO
$19.95Chain wear on your YZ85's swingarm isn't just a cosmetic issue—it's progressive damage that compromises structural integrity and shortens component lifespan. The UFO Chain Slider provides a durable barrier between your chain and swingarm, eliminating...123858- SKU:
- 123858
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
$19.95 -
UFO Chain Roller - Yamaha YZ250F/YZ450F - Black YA04815-001
UFO
$13.95A worn chain roller accelerates sprocket wear and introduces drivetrain slop that compromises power delivery and handling precision. The UFO Chain Roller for YZ250F/YZ450F replaces the stock unit with a reinforced injection-molded design that extends...12310276- SKU:
- 12310276
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- POLYURETHANE
- PRODUCT NAME:
- CHAIN ROLLER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$13.95Qty in Cart: 0Quantity:Price:$13.95Subtotal: -
UFO Chain Guide - KTM 65 SX - Black KT04018-001
UFO
$24.95The OEM chain guide on your KTM 65 SX takes a beating from constant chain contact and abrasive dirt. The UFO Chain Guide replaces worn guides with durable polyurethane construction that absorbs impact and extends chain life, reducing maintenance...12310279- SKU:
- 12310279
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- CHAIN GUIDE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- POLYURETHANE
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
$24.95Qty in Cart: 0Quantity:Price:$24.95Subtotal: -
Hinson Racing Momentum Clutch Basket Honda CRF450R 2002-2012 HS389
HINSON RACING
$399.99Factory clutch baskets wear quickly under aggressive riding, leading to slipping engagement and power loss. The Hinson Racing Momentum Clutch Basket HS389 replaces that wear-prone component with a precision-engineered unit that delivers consistent clutch...11320368- SKU:
- 11320368
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- FEATURES:
- INCLUDES CUSHIONS
- PRODUCT NAME:
- CLUTCH BASKET
- MODEL:
- MOMENTUM
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$399.99
