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
-
SUPERSPROX Countershaft Sprocket - 14-Tooth CST-1322-14-2
SUPERSPROX
$24.95If you're running a countershaft sprocket that's holding back your power delivery, you're losing performance where it counts most—at the point where engine torque meets the chain. The SUPERSPROX CST-1322-14-2 is purpose-built to eliminate that loss with...12121322- SKU:
- 12121322
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- MATERIAL:
- STEEL
- CHAIN SIZE:
- 520
- TOOTH COUNT:
- 14
$24.95 -
SUPERSPROX Countershaft Sprocket - 16-Tooth CST-1370-16-2
SUPERSPROX
$34.95A countershaft sprocket is the foundation of reliable power delivery to your chain—any weakness here compromises acceleration, top speed, and overall drivetrain efficiency. The SUPERSPROX 16-tooth CST-1370-16-2 is engineered with the same exacting...12121327- SKU:
- 12121327
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- CHAIN SIZE:
- 525
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 16
- TYPE:
- COUNTERSHAFT
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
SUPERSPROX Countershaft Sprocket - 14-Tooth CST-1442-14-1
SUPERSPROX
$24.95If you're running a countershaft sprocket that can't keep pace with your power delivery, you're leaving performance on the table—and risking premature wear that sidelines your bike. The SUPERSPROX 14-Tooth Countershaft Sprocket delivers factory racing...12121330- SKU:
- 12121330
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- CHAIN SIZE:
- 520
- MATERIAL:
- STEEL
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- TOOTH COUNT:
- 14
$24.95 -
SUPERSPROX Countershaft Sprocket - 13-Tooth CST-1443-13-1
SUPERSPROX
$29.95Countershaft sprockets endure constant stress from engine torque and chain tension, making durability non-negotiable for reliable acceleration and consistent power delivery. The SUPERSPROX 13-tooth countershaft sprocket combines factory-grade materials...12121331- SKU:
- 12121331
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CHAIN SIZE:
- 520
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
- TOOTH COUNT:
- 13
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal: -
SUPERSPROX Steel Rear Sprocket - 51-Tooth RFE-245-51-BLK
SUPERSPROX
$64.95A rear sprocket is critical to your drivetrain's efficiency, acceleration, and overall performance. This SUPERSPROX steel sprocket delivers race-proven durability without the weight penalty of inferior alternatives, making it ideal for riders who demand...12101894- SKU:
- 12101894
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
$64.95 -
SUPERSPROX Steel Rear Sprocket - 52-Tooth RFE-245-52-BLK
SUPERSPROX
$64.95A worn or mismatched rear sprocket kills acceleration, increases drivetrain wear, and forces your engine to work harder than necessary. The SUPERSPROX 52-tooth steel sprocket delivers precise engagement, extended component life, and measurable...12101895- SKU:
- 12101895
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- MATERIAL:
- STEEL
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 52
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
$64.95Qty in Cart: 0Quantity:Price:$64.95Subtotal: -
SUPERSPROX Steel Rear Sprocket - 45-Tooth RFE-301-45-BLK
SUPERSPROX
$49.95A worn or mismatched sprocket kills acceleration response and accelerates wear on your entire drivetrain. The SUPERSPROX 45-Tooth Steel Rear Sprocket delivers the precision engineering and durability needed for consistent performance across street and...12101896- SKU:
- 12101896
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 45
- TYPE:
- REAR
$49.95 -
SUPERSPROX Stealth Rear Sprocket - 50-Tooth - Gold - Honda RST-210-50-GLD
SUPERSPROX
$119.95Rear sprocket wear can silently rob you of power delivery and shift quality—until sudden failure leaves you stranded. The SUPERSPROX Stealth 50-Tooth Sprocket solves this with a hybrid steel-tooth and aluminum-core design that delivers 4x the lifespan of...12101971- SKU:
- 12101971
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- COLOR/FINISH:
- GOLD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MATERIAL:
- ALUMINUM
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
$119.95Qty in Cart: 0Quantity:Price:$119.95Subtotal: -
SUPERSPROX Rear Sprocket - Blue - Yamaha - 51-Tooth RAL-245-51 BLU
SUPERSPROX
$69.95A lightweight sprocket directly impacts your acceleration and overall drivetrain efficiency—especially critical if you're running a tight power-to-weight ratio. SUPERSPROX's 7075-T6 aluminum construction delivers the strength of heavier steel...12111935- SKU:
- 12111935
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- STREET
- MODEL:
- ALUMINUM
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- RIDING STYLE:
- OFF-ROAD
$69.95 -
SUPERSPROX Stealth Rear Sprocket - 52-Tooth - Gold - Yamaha RST-245-52-GLD
SUPERSPROX
$119.95If you're running high-mileage track sessions or pushing your Yamaha RST-245 hard, sprocket wear becomes a real maintenance headache. The SUPERSPROX Stealth rear sprocket solves this with hardened steel teeth that outlast aluminum by 4x, keeping you on...12101984- SKU:
- 12101984
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- CHAIN SIZE:
- 520
- MATERIAL:
- ALUMINUM
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 52
- UNITS:
- EACH
- COLOR/FINISH:
- GOLD
- COLOR/FINISH:
- STEALTH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- REAR
$119.95 -
UFO Chain Guide - Kawasaki KXF250/450 - Green KA04708-026
UFO
$24.95A worn or damaged chain guide compromises power transfer and accelerates wear across your entire drivetrain. The UFO Chain Guide for Kawasaki KXF250/450 delivers OEM-level fitment with superior durability, keeping your chain tracked and your engine...12310847- SKU:
- 12310847
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- COLOR/FINISH:
- GREEN
- PRODUCT NAME:
- CHAIN GUIDE
- MATERIAL:
- POLYURETHANE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$24.95Qty in Cart: 0Quantity:Price:$24.95Subtotal: -
UFO Chain Slider - Suzuki - Black SU03909-001
UFO
$19.95Chain wear on your swingarm isn't just a cosmetic issue—it's progressive damage that compromises structural integrity and increases maintenance costs. The UFO Chain Slider is a direct-fit protection solution that absorbs chain contact wear, extending the...12310851- SKU:
- 12310851
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- SWINGARM SLIDER
- COLOR/FINISH:
- BLACK
- MATERIAL:
- PLASTIC
- TYPE:
- SWINGARM
$19.95 -
UFO Chain Guide - KTM 65 SX - Black KT04075-001
UFO
$24.95Chain wear is one of the fastest ways to lose power transfer and reliability on your KTM 65 SX. A worn or damaged chain guide forces your drivetrain to work harder, increasing friction and accelerating component degradation. The UFO Chain Guide replaces...12310747- SKU:
- 12310747
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- POLYURETHANE
- PRODUCT NAME:
- CHAIN GUIDE
$24.95 -
UFO Chain Slider - KTM SX 65 - Black KT04076-001
UFO
$19.95Chain contact with your swingarm causes accelerated wear and potential damage that compounds over time—especially critical on high-performance machines like the KTM SX 65 where precision handling matters. The UFO Chain Slider is a direct-fit protection...12310748- SKU:
- 12310748
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- PLASTIC
- PRODUCT NAME:
- CHAIN SLIDER
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- TYPE:
- SWINGARM
- UNITS:
- EACH
$19.95 -
UFO Chain Slider - Kawasaki KX450F - Black KA04755001
UFO
$19.95Your swingarm is critical to handling and power delivery—chain wear will compromise both. The UFO Chain Slider mounts directly to your swingarm, absorbing abrasion and impact from a tight-running chain before it degrades your frame. For KX450F riders...12310995- SKU:
- 12310995
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MATERIAL:
- PLASTIC
- COLOR/FINISH:
- BLACK
- TYPE:
- SWINGARM
- UNITS:
- EACH
- PRODUCT NAME:
- CHAIN SLIDER
- RIDING STYLE:
- OFF-ROAD
$19.95 -
UFO Chain Roller - Kawasaki KX450F - Black KA04754001
UFO
$12.95A worn or damaged chain roller compromises power delivery and accelerates wear on your drivetrain—costing you performance and money. The UFO Chain Roller for your KX450F delivers measurably stronger construction than OEM parts, with precision-engineered...12310996- SKU:
- 12310996
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- MATERIAL:
- POLYURETHANE
- PRODUCT NAME:
- CHAIN ROLLER
- UNITS:
- EACH
$12.95 -
UFO Chain Guide - Yamaha YZ65 - Black YA04872001
UFO
$24.95The YZ65's chain guide takes constant abuse from high-speed transitions and aggressive riding, making a durable replacement essential for consistent power delivery and drivetrain longevity. OEM guides wear quickly under competition use, leading to chain...12310998- SKU:
- 12310998
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MATERIAL:
- POLYURETHANE
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- PRODUCT NAME:
- CHAIN GUIDE
$24.95Qty in Cart: 0Quantity:Price:$24.95Subtotal: -
UFO Chain Slider - Honda CR125R/CR250R - Black HO03607001
UFO
$19.95Chain slap and wear can quickly degrade your swingarm's structural integrity, compromising handling and creating costly repair bills. The UFO Chain Slider shields your swingarm from abrasive chain contact, extending component life and protecting your...123607- SKU:
- 123607
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$19.95 -
UFO Chain Slider - KTM - Orange KT03096127
UFO
$19.95Your swingarm takes constant abuse from chain contact during aggressive riding—abrasion that compounds over time and compromises structural integrity. The UFO Chain Slider is engineered to absorb that wear, protecting your frame's investment and...12310303- SKU:
- 12310303
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PRODUCT NAME:
- CHAIN SLIDER
- COLOR/FINISH:
- ORANGE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- PLASTIC
- TYPE:
- SWINGARM
$19.95 -
UFO Chain Slider - Honda CR125R/CR250R - Black HO02632001
UFO
$19.95Chain wear against your swingarm doesn't just look bad—it compromises structural integrity and can lead to costly frame damage over time. The UFO Chain Slider protects your Honda CR125R or CR250R's swingarm with a durable barrier that absorbs chain...12310306- SKU:
- 12310306
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- BLACK
- TYPE:
- SWINGARM
- UNITS:
- EACH
- PRODUCT NAME:
- CHAIN SLIDER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- PLASTIC
$19.95
