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
-
On Sale
SUPERSPROX Steel Rear Sprocket - 50-Tooth RFE-245-50-BLK
SUPERSPROX
MSRP: $49.95Now: $42.46Was: $49.95A worn or undersized rear sprocket tanks your acceleration and forces your engine to work harder than necessary. The SUPERSPROX 50-tooth steel sprocket delivers the durability and precision you need for consistent power transfer, whether you're pushing...12101893- SKU:
- 12101893
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- MOUNTING POSITION:
- REAR
- UNITS:
- EACH
MSRP: $49.95Now: $42.46Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.46Was: $49.95Subtotal: -
UFO Chain Slider - Suzuki RM125/250 - Black SU02964001
UFO
$24.95Chain slap and wear are inevitable on high-revving two-strokes, but uncontrolled swingarm damage doesn't have to be. This UFO chain slider absorbs impact and abrasion, protecting your swingarm from premature wear while maintaining chain alignment under...122964- SKU:
- 122964
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$24.95 -
UFO Chain Roller - Honda CRF250R - Red HO04609-070
UFO
$14.95Stock chain rollers wear quickly under aggressive riding and can cause premature chain degradation. The UFO Chain Roller replaces that weak link with an injection-molded design that outlasts OEM components while maintaining precise chain alignment. For...12310401- SKU:
- 12310401
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- POLYURETHANE
- PRODUCT NAME:
- CHAIN ROLLER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- RED
$14.95 -
UFO Chain Roller - Honda CRF250R - Black HO04609-001
UFO
$14.95Stock chain rollers wear quickly under aggressive riding conditions, leading to accelerated chain wear and potential drivetrain damage. The UFO Chain Roller replaces that weak link with a stronger, injection-molded design engineered to handle the demands...12310402- SKU:
- 12310402
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- POLYURETHANE
- PRODUCT NAME:
- CHAIN ROLLER
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
$14.95 -
UFO Chain Slider - Honda CRF250R/CRF450R - Red HO04644-070
UFO
$19.95Chain slap against your swingarm accelerates wear and can compromise structural integrity during aggressive riding. The UFO Chain Slider absorbs impact and abrasion, extending the service life of your swingarm while reducing maintenance intervals. A...12310403- SKU:
- 12310403
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- COLOR/FINISH:
- RED
- TYPE:
- SWINGARM
- UNITS:
- EACH
- PRODUCT NAME:
- CHAIN SLIDER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- PLASTIC
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
UFO Chain Roller - Honda CRF250R - Red HO04646-070
UFO
$12.95The OEM chain roller on your CRF250R experiences constant wear from dirt, debris, and lateral chain pressure—replacement is essential for maintaining proper chain alignment and preventing premature sprocket damage. This UFO roller features...12310404- SKU:
- 12310404
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- POLYURETHANE
- PRODUCT NAME:
- CHAIN ROLLER
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- RED
- UNITS:
- EACH
$12.95Qty in Cart: 0Quantity:Price:$12.95Subtotal: -
UFO Chain Slider - KTM 125-525 SX/SXF SX 250 - Orange KT04029-127
UFO
$24.95Chain slap and abrasion can accelerate swingarm wear, compromising your bike's structural integrity and requiring costly repairs. The UFO Chain Slider is engineered to absorb direct chain contact, protecting your swingarm from premature damage and...12310409- SKU:
- 12310409
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MATERIAL:
- PLASTIC
- TYPE:
- SWINGARM
- UNITS:
- EACH
- COLOR/FINISH:
- ORANGE
- PRODUCT NAME:
- CHAIN SLIDER
- RIDING STYLE:
- OFF-ROAD
$24.95 -
UFO Chain Guide - Suzuki RM-Z450 - Black SU04945-001
UFO
$28.95The OEM chain guide on your RM-Z450 takes a beating every time you ride—mud, rocks, and constant chain friction wear it down fast. The UFO Chain Guide replaces that worn component with durable polyurethane construction that resists impact and abrasion,...12310961- SKU:
- 12310961
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- CHAIN GUIDE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- POLYURETHANE
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
$28.95Qty in Cart: 0Quantity:Price:$28.95Subtotal: -
UFO Chain Slider - Suzuki RM-Z450 - Black SU04944-001
UFO
$24.95Chain wear is one of the fastest ways to compromise swingarm integrity and create expensive secondary damage on your RM-Z450. The UFO Chain Slider absorbs the abrasive contact between your chain and swingarm, extending component lifespan while...12310962- SKU:
- 12310962
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- CHAIN SLIDER
- UNITS:
- EACH
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- TYPE:
- SWINGARM
$24.95Qty in Cart: 0Quantity:Price:$24.95Subtotal: -
UFO Chain Roller - Yamaha YZ450F - Black YA04864-001
UFO
$16.95The stock chain roller on your YZ450F will eventually wear down, causing premature chain wear and potential drivetrain damage. The UFO Chain Roller replaces that weak link with an injection-molded design that significantly outlasts OEM components, giving...12310972- SKU:
- 12310972
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- POLYURETHANE
- PRODUCT NAME:
- CHAIN ROLLER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$16.95Qty in Cart: 0Quantity:Price:$16.95Subtotal: -
UFO Chain Slider - Kawasaki - Green KA04755-026
UFO
$24.95Chain slap and abrasion will eventually damage your swingarm if left unprotected—a costly repair that sidelines your bike. The UFO Chain Slider shields your swingarm's finish and structural integrity from constant chain contact, extending the service...12311044- SKU:
- 12311044
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- GREEN
- MATERIAL:
- PLASTIC
- UNITS:
- EACH
- PRODUCT NAME:
- CHAIN SLIDER
- TYPE:
- SWINGARM
$24.95 -
UFO Chain Slider - Suzuki RM-Z450 - Black SU04912-001
UFO
$24.95Chain slap against your swingarm is inevitable wear on the track—until you install a proper slider. The UFO Chain Slider absorbs impact and abrasion, protecting your swingarm from costly damage while maintaining clean aesthetics. A bolt-on essential for...12310155- SKU:
- 12310155
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- CHAIN SLIDER
- COLOR/FINISH:
- BLACK
- TYPE:
- SWINGARM
$24.95 -
UFO Chain Guide - Yamaha YZ125/250 WR250F/450F - Black YA03890-001
UFO
$28.95A worn or damaged chain guide compromises power delivery and risks catastrophic drivetrain failure. This OEM-replacement UFO chain guide restores precise chain alignment and reduces lateral movement, protecting your sprockets and transmission from...12310158- SKU:
- 12310158
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- PRODUCT NAME:
- CHAIN GUIDE
- MATERIAL:
- POLYURETHANE
- RIDING STYLE:
- OFF-ROAD
$28.95 -
UFO Chain Guide - KTM 125-525 SX/EXC - Black KT03068-001
UFO
$24.95Chain guides absorb the constant lateral forces and vibrations that come with aggressive riding, protecting your sprockets and frame from premature wear. The UFO Chain Guide delivers OEM-level fitment with superior polyurethane construction that outlasts...123068- SKU:
- 123068
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$24.95Qty in Cart: 0Quantity:Price:$24.95Subtotal: -
UFO Chain Guide - Kawasaki/Suzuki - Black KA03750-001
UFO
$28.95A worn or damaged chain guide compromises drivetrain efficiency and accelerates wear on your sprockets and chain. The UFO Chain Guide restores OEM-spec alignment and protection, keeping your power delivery consistent and your drivetrain components in one...12310001- SKU:
- 12310001
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- MATERIAL:
- POLYURETHANE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- CHAIN GUIDE
$28.95 -
UFO Chain Guide - Yamaha YZ125/250/WR250F/450F - Black YA03870-001
UFO
$28.95A worn or damaged chain guide compromises power transfer and risks catastrophic drivetrain failure on the track or trail. The UFO Chain Guide replaces your OEM unit with durable polyurethane construction that resists wear, maintains consistent chain...12310002- SKU:
- 12310002
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- POLYURETHANE
- PRODUCT NAME:
- CHAIN GUIDE
$28.95 -
UFO Chain Slider - KTM 85 SX - Black KT03083-001
UFO
$24.95Chain wear on your KTM 85 SX swingarm isn't just a cosmetic issue—it's a sign of accelerating damage that compromises suspension geometry and increases maintenance costs. The UFO Chain Slider shields your swingarm from direct chain contact, extending...12310031- SKU:
- 12310031
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
- PRODUCT NAME:
- CHAIN SLIDER
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- TYPE:
- SWINGARM
- UNITS:
- EACH
- MATERIAL:
- PLASTIC
$24.95 -
UFO Chain Slider - Kawasaki KX250F - Black KA03762-001
UFO
$24.95Chain slap and abrasion are silent performance killers on the track. The UFO Chain Slider shields your swingarm from costly damage and debris, extending the life of your drivetrain while maintaining optimal chain alignment under aggressive riding. A...12310033- SKU:
- 12310033
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- TYPE:
- SWINGARM
- PRODUCT NAME:
- CHAIN SLIDER
- UNITS:
- EACH
- MATERIAL:
- PLASTIC
$24.95 -
Hinson Racing Billet Clutch Basket 1996-2004 Honda XR400R H056
HINSON RACING
$259.99If you're running an XR400R at the track or trail, clutch reliability directly impacts your lap times and bike control. The Hinson Racing billet clutch basket H056 reduces clutch pull effort while delivering the durability that pro teams trust, keeping...H056- SKU:
- H056
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- CLUTCH BASKET
- COLOR/FINISH:
- BLACK
- MODEL:
- BILLETPROOF
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- AKADIZED
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- UNITS:
- EACH
$259.99Qty in Cart: 0Quantity:Price:$259.99Subtotal: -
Hinson Racing Billetproof Clutch Basket for 1990-2001 Honda CR500R H059
HINSON RACING
$259.99If you're pushing your CR500R to its limits, clutch engagement and durability are non-negotiable. The Hinson Racing Billetproof Clutch Basket delivers race-proven reliability with significantly reduced clutch pull, giving you smoother power delivery and...H059- SKU:
- H059
- Availability:
- Ships Same Business Day
- Weight:
- 1.13 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- UNITS:
- EACH
- MODEL:
- BILLETPROOF
- PRODUCT NAME:
- CLUTCH BASKET
- COLOR/FINISH:
- AKADIZED
- RIDING STYLE:
- OFF-ROAD
$259.99
