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 Sprocket Cover - Chrome - '04-'19 XL D26-0409C
DRAG SPECIALTIES
$106.04Protect your primary drivetrain from debris, moisture, and impact damage while maintaining clean aesthetics on your Harley-Davidson XL. This cast aluminum cover provides genuine OEM-level durability without requiring custom fabrication or modification to...11070279- SKU:
- 11070279
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- TYPE:
- SPROCKET
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$106.04 -
DRAG SPECIALTIES Sprocket Cover - Polished - '86-'90 XL 26-0406
DRAG SPECIALTIES
$98.83The DRAG Specialties Sprocket Cover protects your primary drive system from road debris, moisture, and contamination that can compromise reliability and longevity. Cast aluminum construction delivers durability without excess weight, while the polished...11070282- SKU:
- 11070282
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- COLOR/FINISH:
- POLISHED
- PRODUCT NAME:
- COVER
- TYPE:
- SPROCKET
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$98.83Qty in Cart: 0Quantity:Price:$98.83Subtotal: -
DRAG SPECIALTIES Outer Primary Cover - Chrome - '07-'17 Softail D11-0298
DRAG SPECIALTIES
$520.10A primary cover protects your Softail's most critical engine component—the clutch and primary drive system—from road debris, moisture, and contamination that can compromise performance and longevity. This DRAG Specialties outer primary cover combines...11070324- SKU:
- 11070324
- Availability:
- Ships Same Business Day
- Weight:
- 7.99 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
$520.10 -
DRAG SPECIALTIES Primary Plug - 1/8 NPT" 11-0291-P
DRAG SPECIALTIES
$18.49A primary drain plug is essential for reliable engine maintenance—it's your direct access point for clean, efficient oil changes without complications. The DRAG SPECIALTIES Primary Plug ensures a secure, leak-free seal every time you service your engine,...11070326- SKU:
- 11070326
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- ZINC
- UNITS:
- EACH
- PRODUCT NAME:
- DRAIN PLUG
- RIDING STYLE:
- STREET
$18.49 -
DRAG SPECIALTIES Black Inspection Cover D33-0115WB
DRAG SPECIALTIES
$31.88A clean, finished engine bay is the hallmark of a purpose-built machine—and this inspection cover delivers both aesthetic refinement and functional protection. Machined from billet aluminum, it guards critical engine components while eliminating the...11070487- SKU:
- 11070487
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- PRODUCT NAME:
- INSPECTION COVER
- TYPE:
- PRIMARY
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$31.88 -
DRAG SPECIALTIES Polished Inspection Cover D33-0115P
DRAG SPECIALTIES
$29.82A quality inspection cover does more than protect critical engine components—it's a reflection of your attention to detail and commitment to preserving your machine's integrity. This DRAG SPECIALTIES polished cover combines functional protection with a...11070488- SKU:
- 11070488
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- INSPECTION COVER
- TYPE:
- PRIMARY
- UNITS:
- KIT
- COLOR/FINISH:
- POLISHED
- RIDING STYLE:
- STREET
$29.82 -
DRAG SPECIALTIES Chrome Derby Cover D33-0110
DRAG SPECIALTIES
$109.13A derby cover isn't just cosmetic—it protects your primary cover from road debris, moisture, and UV exposure while maintaining a clean, finished appearance on your engine. This Drag Specialties chrome piece combines die-cast durability with a refined...11070489- SKU:
- 11070489
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$109.13 -
DRAG SPECIALTIES Inspection Cover - Chrome - '85-'06 FLT 33-0029
DRAG SPECIALTIES
$46.30Keep your FLT's powertrain protected while maintaining a factory-correct appearance. This chrome-plated inspection cover seals critical engine components against road debris and moisture, ensuring long-term reliability on extended rides. OEM-spec...11070390- SKU:
- 11070390
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- STEEL
- UNITS:
- EACH
- MOUNTING STYLE:
- 4 HOLE
- PRODUCT NAME:
- INSPECTION COVER
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
$46.30 -
DRAG SPECIALTIES Primary Plug - 1/2"-20 D11-0301-P
DRAG SPECIALTIES
$20.55A quality primary drain plug is essential for maintaining proper oil circulation and engine health in high-performance applications. The DRAG SPECIALTIES Primary Plug delivers reliable sealing with a proven design that withstands the demands of racing...11070340- SKU:
- 11070340
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- ZINC
- PRODUCT NAME:
- DRAIN PLUG
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$20.55 -
DRAG SPECIALTIES Outer Primary Cover - Black - '99-'06 Softail 11-0296KDSSB
DRAG SPECIALTIES
$400.62Your Softail's primary cover takes constant abuse from heat, debris, and vibration—a worn or damaged cover compromises both aesthetics and engine protection. The DRAG Specialties Outer Primary Cover delivers OEM-quality construction with die-cast...11070359- SKU:
- 11070359
- Availability:
- Ships Same Business Day
- Weight:
- 8.50 LBS
- COLOR/FINISH:
- SATIN BLACK
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- COVER
- TYPE:
- OUTER PRIMARY
$400.62 -
DRAG SPECIALTIES Outer Primary Cover - Black - '95-'98 Softail 11-0293KDSSB
DRAG SPECIALTIES
$400.62The primary cover is a critical component that protects your engine's internal timing and clutch mechanisms from dirt, debris, and environmental exposure. A quality outer primary cover like this die-cast aluminum unit ensures reliable sealing and...11070360- SKU:
- 11070360
- Availability:
- Ships Same Business Day
- Weight:
- 8.45 LBS
- MATERIAL:
- ALUMINUM
- TYPE:
- OUTER PRIMARY
- COLOR/FINISH:
- SATIN BLACK
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$400.62Qty in Cart: 0Quantity:Price:$400.62Subtotal: -
DRAG SPECIALTIES Outer Primary Cover - Black - '89-'93 Softail 11-0291KDSSB
DRAG SPECIALTIES
$397.53Your Softail's primary cover takes a beating—road salt, debris, and constant vibration degrade stock covers quickly. This Drag Specialties outer primary cover is die-cast aluminum, engineered to withstand aggressive riding while maintaining a clean,...11070361- SKU:
- 11070361
- Availability:
- Ships Same Business Day
- Weight:
- 8.54 LBS
- MATERIAL:
- ALUMINUM
- TYPE:
- OUTER PRIMARY
- COLOR/FINISH:
- SATIN BLACK
- UNITS:
- EACH
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
$397.53 -
DRAG SPECIALTIES Satin Black Derby Cover 33-0054SB
DRAG SPECIALTIES
$63.81A quality derby cover protects your primary cover from damage while delivering a clean, finished look to your engine. This Drag Specialties satin black option combines durability with understated style—die-cast construction resists impact and weathering...11070363- SKU:
- 11070363
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- SATIN BLACK
- UNITS:
- EACH
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
$63.81 -
DRAG SPECIALTIES Matte Black Derby Cover 33-0017KSB
DRAG SPECIALTIES
$47.33A quality derby cover protects your primary case from road debris and weather while presenting a finished look to your engine bay. The DRAG Specialties matte black finish resists glare and complements modern Harley aesthetics without the maintenance...11070365- SKU:
- 11070365
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MOUNTING STYLE:
- 3 HOLE
- COLOR/FINISH:
- MATTE BLACK
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$47.33 -
DRAG SPECIALTIES Wrinkle Black Derby Cover 33-0016KWB
DRAG SPECIALTIES
$44.24A quality derby cover does more than protect your primary drive—it completes the aesthetic of your engine while shielding critical components from road debris and moisture. This Drag Specialties wrinkle black cover delivers OEM-level fitment and...11070366- SKU:
- 11070366
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MOUNTING STYLE:
- 4 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- WRINKLE BLACK
- MATERIAL:
- DIE-CAST
$44.24 -
DRAG SPECIALTIES Satin Black Derby Cover 33-0016KSB
DRAG SPECIALTIES
$47.33A derby cover protects your primary drivetrain from dirt, debris, and weather while giving your Big Twin or Dyna a finished, polished look. This die-cast Drag Specialties cover combines durability with a clean satin black aesthetic that complements...11070367- SKU:
- 11070367
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- DERBY COVER
- MOUNTING STYLE:
- 4 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- SATIN BLACK
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- UNITS:
- EACH
$47.33 -
DRAG SPECIALTIES Transmission Cover - Black I30-0212SB
DRAG SPECIALTIES
$129.73A transmission cover serves as essential protection against debris, moisture, and heat damage while maintaining clean engine aesthetics. This DRAG SPECIALTIES unit combines straightforward installation with reliable durability, making it a practical...11070368- SKU:
- 11070368
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- SATIN
- MATERIAL:
- ZINC
- MOUNTING STYLE:
- 6 HOLE
- TYPE:
- TRANSMISSION SIDE
- RIDING STYLE:
- STREET
$129.73 -
DRAG SPECIALTIES Mainshaft Sprocket Nut 33-0303-SC1
DRAG SPECIALTIES
$19.52A worn or damaged mainshaft sprocket nut compromises the critical connection between your sprocket and drive gear—risking slippage, misalignment, and catastrophic drivetrain failure. This OEM-equivalent replacement from Drag Specialties ensures a secure,...DS194079- SKU:
- DS194079
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- NUT
- TYPE:
- MAINSHAFT SPROCKET
- UNITS:
- EACH
$19.52 -
DRAG SPECIALTIES Kickstarter Ratchet Gear Kit 26-0267/9ASC-2
DRAG SPECIALTIES
$88.53A reliable starter system is critical for consistent engine ignition in high-demand riding conditions. The DRAG Specialties Kickstarter Ratchet Gear Kit eliminates missed engagements and false starts with its precision undercut-tooth design, ensuring...DS194119- SKU:
- DS194119
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- UNITS:
- KIT
- FEATURES:
- INCLUDES 1.153' SPACER
- PRODUCT NAME:
- KICKSTARTER KIT
- RIDING STYLE:
- STREET
$88.53 -
DRAG SPECIALTIES Complete 3 Stud Hub 17-0000-BX-LB2
DRAG SPECIALTIES
$211.10A properly functioning wheel hub is fundamental to safe, reliable motorcycle operation—especially in high-performance or drag racing applications where lateral forces and sustained acceleration demand precision bearings and secure wheel attachment. The...DS195001- SKU:
- DS195001
- Availability:
- Ships Same Business Day
- Weight:
- 5.13 LBS
- RIDING STYLE:
- STREET
- STYLE:
- THREE-STUD
- TYPE:
- CLUTCH
- PRODUCT NAME:
- HUB
- UNITS:
- EACH
$211.10
