Harley Drivetrain
Harley Bike Drivetrain Parts at JJ Motorsports
Upgrade your Harley's drivetrain for smoother power delivery and reliability with components from JJ Motorsports. Our selection includes transmission mounting plates, offset sprockets, mechanical reverse kits, starter spacers, pulley spacers, and primary covers designed for heavy-duty use, easy bolt-in installation, and enhanced performance. Compatible with Big Twins, Softail, Dyna, and more, these parts feature chrome finishes, billet aluminum, and CNC-machined steel for corrosion resistance and custom fitment.
Shop trusted brands like Paughco for primary covers and PBI for sprockets. Explore related categories such as Harley engine parts for rebuilds or Harley suspension for balanced setups.
Top Harley Drivetrain Products
- PAUGHCO Transmission Plate - OE Type 4-Speed 218 – Heavy-duty steel for Big Twins with 4-speed transmissions.
- PBI Offset Transmission Sprocket - 22-Tooth 281-22 – CNC-machined chromoly steel with 0.750" offset for 530 chains.
- MOTOR TRIKE Mechanical Reverse Kit MTTR-0025 – Lightweight aluminum with electronic cut-off for easy parking.
- TERRY COMPONENTS Starter Spacer 779000 – Billet aluminum, 1-1/2" thick for longer starters.
- PINGEL Rear Pulley Spacer 62051 – Billet aluminum for wider tires up to 142mm.
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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DRAG SPECIALTIES Skull Derby Cover - Chrome - 3 Hole 33-0061-PC
DRAG SPECIALTIES
$75.95A quality derby cover does more than protect your engine—it completes your bike's visual identity while shielding critical components from debris and moisture. The DRAG Specialties Skull Derby Cover delivers authentic styling with robust die-cast...19020062- SKU:
- 19020062
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- MOUNTING STYLE:
- 3 HOLE
- RIDING STYLE:
- STREET
- STYLE:
- 3-D SKULL
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$75.95 -
DRAG SPECIALTIES Pressure Plate 13421
DRAG SPECIALTIES
$42.35A pressure plate is critical to your clutch system's reliability and performance—any warping or flex under load directly compromises engagement consistency and can accelerate wear on your clutch disc. The DRAG SPECIALTIES Pressure Plate 13421 eliminates...DS243375- SKU:
- DS243375
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- COLOR/FINISH:
- POLISHED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PRESSURE PLATE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- CLUTCH
$42.35Qty in Cart: 0Quantity:Price:$42.35Subtotal: -
DRAG SPECIALTIES Transmission Top Cover - Chrome 35-0027
DRAG SPECIALTIES
$84.75A quality transmission top cover is essential for protecting your drivetrain while maintaining a cohesive, finished appearance. This DRAG SPECIALTIES chrome cover delivers both function and aesthetics, seamlessly integrating with chrome or flat black...11050034- SKU:
- 11050034
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- POWDER-COATED
- RIDING STYLE:
- STREET
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- COVER
- TYPE:
- TRANSMISSION TOP
- UNITS:
- EACH
$84.75 -
DRAG SPECIALTIES Transmission Cover - Chrome I30-0212
DRAG SPECIALTIES
$133.56A transmission cover does more than protect your drivetrain from road debris and contaminants—it's a critical component that prevents fluid loss and maintains optimal operating temperatures. The DRAG SPECIALTIES Chrome I30-0212 delivers a polished,...11050035- SKU:
- 11050035
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ZINC
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- COVER
- TYPE:
- TRANSMISSION SIDE
- UNITS:
- EACH
$133.56 -
DRAG SPECIALTIES Transmission Top Cover - Black I35-0028MB
DRAG SPECIALTIES
$109.13A clean, finished transmission top cover is essential for a professional-looking engine bay and protecting critical drivetrain components from debris and contamination. The DRAG SPECIALTIES flat black finish integrates seamlessly with modern engine...11050209- SKU:
- 11050209
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- POWDER-COATED
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP
$109.13 -
DRAG SPECIALTIES Transmission Top Cover I35-0029MB/G
DRAG SPECIALTIES
$118.67A properly sealed transmission top cover is essential for maintaining fluid integrity and preventing contamination during high-performance operation. This DRAG SPECIALTIES cover features die-cast construction for durability while the included...11050251- SKU:
- 11050251
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP
- UNITS:
- KIT
- COLOR/FINISH:
- MATTE BLACK
$118.67 -
DRAG SPECIALTIES Transmission Bearing 6207-2RS
DRAG SPECIALTIES
$35.59Transmission bearing failure can bring your build to a halt mid-season—or worse, mid-race. The DRAG SPECIALTIES 6207-2RS is engineered to withstand the shock loads and sustained RPM of high-performance applications, delivering reliable support for...11060010- SKU:
- 11060010
- Availability:
- Ships Same Business Day
- Weight:
- 1.07 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- MAINSHAFT
- PRODUCT NAME:
- BALL BEARING
$35.59 -
DRAG SPECIALTIES Skull Derby Cover - Chrome - 4 Hole 33-0063
DRAG SPECIALTIES
$92.95A quality derby cover serves as both functional engine protection and a statement piece on your cruiser. The DRAG Specialties Skull Derby Cover delivers aggressive styling with reliable die-cast construction that resists cracking and fading—essential if...11070034- SKU:
- 11070034
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- MOUNTING STYLE:
- 4 HOLE
- RIDING STYLE:
- STREET
- STYLE:
- 3-D SKULL
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$92.95 -
DRAG SPECIALTIES Outer Primary Cover - Chrome - '99-'06 Softail 11-0296K
DRAG SPECIALTIES
$388.95A worn or damaged primary cover compromises both the aesthetic appeal and protective integrity of your Softail's drivetrain. This Drag Specialties outer primary cover restores factory appearance while safeguarding critical internal components from road...11070036- SKU:
- 11070036
- Availability:
- Ships Same Business Day
- Weight:
- 8.68 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$388.95 -
DRAG SPECIALTIES Outer Primary Cover - Chrome - '89-'93 Softail 11-0291K
DRAG SPECIALTIES
$388.95A worn or damaged primary cover compromises both engine protection and the visual presentation of your Softail's drivetrain. This DRAG SPECIALTIES replacement restores OEM fitment and durability without fabrication, using die-cast aluminum construction...11070037- SKU:
- 11070037
- Availability:
- Ships Same Business Day
- Weight:
- 8.57 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
$388.95 -
DRAG SPECIALTIES Inner Primary Cover 11-0295K
DRAG SPECIALTIES
$397.95A quality inner primary cover is essential for protecting your drivetrain components while maintaining a clean, finished appearance on your motorcycle. This die-cast aluminum cover delivers durability and corrosion resistance with a chrome-plated finish...11070038- SKU:
- 11070038
- Availability:
- Ships Same Business Day
- Weight:
- 11.42 LBS
- TYPE:
- INNER PRIMARY
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$397.95 -
DRAG SPECIALTIES Inner Primary Cover 11-0297K
DRAG SPECIALTIES
$395.95A worn or damaged inner primary cover compromises both the aesthetic appeal and protective function of your engine case. This Drag Specialties replacement restores OEM-level durability while maintaining a factory-correct appearance, ensuring your primary...11070045- SKU:
- 11070045
- Availability:
- Ships Same Business Day
- Weight:
- 11.75 LBS
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$395.95 -
DRAG SPECIALTIES 3 Hole Gold Live to Ride Derby Cover 33-0010DA
DRAG SPECIALTIES
$105.95A primary cover isn't just protective—it's the first visual statement of your bike's character. The Drag Specialties 3 Hole Gold Live to Ride Derby Cover delivers authentic craftsmanship with its intricately detailed plated eagle and recessed script...11070156- SKU:
- 11070156
- Availability:
- Ships Same Business Day
- Weight:
- 0.72 LBS
- COLOR/FINISH:
- GOLD
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- DERBY COVER
- STYLE:
- EAGLE WITH BANNER
- MODEL:
- LIVE TO RIDE
- MOUNTING STYLE:
- 3 HOLE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$105.95 -
DRAG SPECIALTIES Sprocket Cover - Polished - '91-'03 XL 26-0408
DRAG SPECIALTIES
$109.95A quality sprocket cover protects your primary drive system from road debris, moisture, and contamination—critical for maintaining chain longevity and transmission reliability on your XL Sportster. The polished finish delivers a clean, finished look...11070280- SKU:
- 11070280
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- COLOR/FINISH:
- POLISHED
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- TYPE:
- SPROCKET
$109.95 -
DRAG SPECIALTIES Sprocket Cover - Chrome - '91-'03 XL 26-0408C
DRAG SPECIALTIES
$105.95A sprocket cover protects your primary drivetrain from road debris, moisture, and contamination—critical for maintaining chain longevity and smooth power delivery on your Harley-Davidson XL. This cast aluminum cover combines durability with a polished...11070281- SKU:
- 11070281
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- RIDING STYLE:
- STREET
- TYPE:
- SPROCKET
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$105.95 -
DRAG SPECIALTIES Outer Primary Cover - Chrome - '06-'17 FXD D11-0299
DRAG SPECIALTIES
$504.95The DRAG SPECIALTIES Outer Primary Cover protects your drivetrain's most critical components while delivering the polished look that separates a maintained bike from a neglected one. Die-cast aluminum construction provides durability and heat dissipation...11070325- SKU:
- 11070325
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- MATERIAL:
- ALUMINUM
- TYPE:
- OUTER PRIMARY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$504.95 -
DRAG SPECIALTIES Primary Plug - 5/16"-18 11-0298P
DRAG SPECIALTIES
$17.95A primary drain plug is essential maintenance infrastructure for any serious engine builder or racer. This DRAG Specialties unit provides reliable fluid containment and drainage cycles after extended track sessions or high-load operation. The zinc finish...11070339- SKU:
- 11070339
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- COLOR/FINISH:
- ZINC
- UNITS:
- EACH
- PRODUCT NAME:
- DRAIN PLUG
- RIDING STYLE:
- STREET
$17.95 -
DRAG SPECIALTIES Wrinkle Black Derby Cover 33-0054WB
DRAG SPECIALTIES
$61.95A quality derby cover protects your primary cover from road debris and weather while delivering the polished look your engine deserves. This Drag Specialties wrinkle black design combines durability with a clean aesthetic that complements any Big Twin...11070362- SKU:
- 11070362
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- COLOR/FINISH:
- WRINKLE BLACK
- MATERIAL:
- DIE-CAST
- MOUNTING STYLE:
- 5 HOLE
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$61.95 -
DRAG SPECIALTIES Inspection Cover - Matte Black 14009B
DRAG SPECIALTIES
$22.95A clean engine bay starts with attention to detail, and the DRAG Specialties Inspection Cover keeps your primary cover looking sharp while protecting critical engine components from debris and moisture. This matte black finish complements modern engine...11070376- SKU:
- 11070376
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- MATTE BLACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- INSPECTION COVER
- TYPE:
- PRIMARY
- MOUNTING STYLE:
- 4 HOLE
- UNITS:
- EACH
- MATERIAL:
- STEEL
$22.95Qty in Cart: 0Quantity:Price:$22.95Subtotal: -
DRAG SPECIALTIES Gloss Black Derby Cover D33-0110GB
DRAG SPECIALTIES
$105.95A quality derby cover protects your engine's internal components from road debris and moisture while delivering a finished, polished appearance to your bike's top end. This gloss black cover combines die-cast durability with a clean domed profile that...11070556- SKU:
- 11070556
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COLOR/FINISH:
- GLOSS BLACK
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- RIDING STYLE:
- STREET
- MOUNTING STYLE:
- 5 HOLE
$105.95Qty in Cart: 0Quantity:Price:$105.95Subtotal:
