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
-
PERFORMANCE MACHINE (PM) Transmission Cover - Contrast Cut¢â€žÂ¢ - Scallop 0203-2018-BM
PERFORMANCE MACHINE (PM)
$333.95A transmission cover is one of the few engine bay components visible to the eye—and the OEM piece rarely reflects the quality of your build. This PM Contrast Cut cover replaces that plastic or stamped-steel original with a precision-machined billet...11050219- SKU:
- 11050219
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MODEL:
- SCALLOP
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- BLACK
- TYPE:
- TRANSMISSION
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- CONTRAST CUT™
$333.95 -
PERFORMANCE MACHINE (PM) Transmission Cover - Platinum Cut¢â€žÂ¢ - Scallop 0203-2018-BMP
PERFORMANCE MACHINE (PM)
$333.95If you're running a high-performance build, your transmission cover does more than seal—it sets the tone for underhood aesthetics and protection. The PM Platinum Cut Scallop cover replaces your OEM unit with a CNC-machined billet aluminum piece that...11050220- SKU:
- 11050220
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- COLOR/FINISH:
- PLATINUM CUT
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MODEL:
- SCALLOP
- TYPE:
- TRANSMISSION
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
$333.95 -
PERFORMANCE MACHINE (PM) Transmission Cover - Chrome - Scallop 0203-2018-CH
PERFORMANCE MACHINE (PM)
$333.95A stock transmission cover can warp under heat and lose its aesthetic appeal over time. The PM Transmission Cover delivers a precision-engineered replacement that combines durability with a refined finish, giving your engine bay the clean, professional...11050221- SKU:
- 11050221
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- MATERIAL:
- ALUMINUM
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- MODEL:
- SCALLOP
- TYPE:
- TRANSMISSION
$333.95 -
PERFORMANCE MACHINE (PM) Transmission Cover - Chrome 0203-2020M-CH
PERFORMANCE MACHINE (PM)
$331.95Your transmission cover takes a beating from heat, UV exposure, and constant abrasion—stock plastic failures are common. The PM Transmission Cover replaces that weak point with precision-engineered billet aluminum and a crystal-clear polycarbonate lens...11050252- SKU:
- 11050252
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$331.95 -
PERFORMANCE MACHINE (PM) Transmission Cover - Contrast Cut¢â€žÂ¢ 0203-2020M-BM
PERFORMANCE MACHINE (PM)
$331.95Your transmission cover takes a beating—heat cycles, UV exposure, and abrasion all degrade OEM plastic housings over time. The PM Transmission Cover replaces that weak point with CNC-machined billet aluminum and a polycarbonate lens that resists...11050253- SKU:
- 11050253
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- COLOR/FINISH:
- CONTRAST CUT™
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$331.95Qty in Cart: 0Quantity:Price:$331.95Subtotal: -
PERFORMANCE MACHINE (PM) Transmission Cover - Black Ops¢â€žÂ¢ 0203-2020M-SMB
PERFORMANCE MACHINE (PM)
$331.95Stock transmission covers expose critical drivetrain components to dust, debris, and UV damage—compromising both aesthetics and longevity. The PM Black Ops transmission cover replaces worn or damaged OEM covers with CNC-machined billet aluminum...11050254- SKU:
- 11050254
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK OPS™
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- TYPE:
- TRANSMISSION
$331.95Qty in Cart: 0Quantity:Price:$331.95Subtotal: -
PERFORMANCE MACHINE (PM) Derby Cover 0177-2058-BM
PERFORMANCE MACHINE (PM)
$239.95A quality derby cover protects your primary case from road debris and moisture while maintaining a finished appearance that matches your bike's aesthetic. The PM Derby Cover 0177-2058-BM is a direct replacement for stock covers on OEM primaries, offering...11070559- SKU:
- 11070559
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 5 HOLE
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- STYLE:
- SCALLOP
- TYPE:
- DERBY
- COLOR/FINISH:
- CONTRAST CUT™
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
PERFORMANCE MACHINE (PM) Derby Cover 0177-2058-SMB
PERFORMANCE MACHINE (PM)
$217.95A stock derby cover can accumulate debris, restrict airflow, and detract from your primary's appearance. The PM Derby Cover 0177-2058-SMB delivers a precision-engineered replacement with functional scallop design that improves aesthetics while...11070681- SKU:
- 11070681
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK OPS™
$217.95 -
PERFORMANCE MACHINE (PM) Derby Cover - Contrast Cut¢â€žÂ¢ 0177-2075M-BM
PERFORMANCE MACHINE (PM)
$191.95A derby cover is one of the most visible components on your engine, so why settle for stock? The PM Contrast Cut Derby Cover replaces worn or damaged OEM covers while delivering a refined aesthetic that complements any build. With precision CNC machining...11070667- SKU:
- 11070667
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- STYLE:
- SCALLOP
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- CONTRAST CUT™
- TYPE:
- DERBY
$191.95 -
PERFORMANCE MACHINE (PM) Derby Cover - Chrome 0177-2075M-CH
PERFORMANCE MACHINE (PM)
$191.95A derby cover serves as both a protective seal and a visual statement on your engine. The PM Derby Cover combines OEM-spec functionality with premium billet aluminum construction, ensuring reliable gasket integrity and a polished appearance that...11070668- SKU:
- 11070668
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- STYLE:
- SCALLOP
- TYPE:
- DERBY
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$191.95 -
PERFORMANCE MACHINE (PM) Derby Cover - Black Ops¢â€žÂ¢ 0177-2075M-SMB
PERFORMANCE MACHINE (PM)
$191.95A quality derby cover protects your engine's internal components from moisture, debris, and contamination while maintaining a clean, professional appearance on your engine bay. The PM Black Ops Derby Cover combines precision engineering with OEM...11070669- SKU:
- 11070669
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- STYLE:
- SCALLOP
- TYPE:
- DERBY
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK OPS™
$191.95 -
DRAG SPECIALTIES Lower Belt Guard - 99 FXD - Chrome 105123BXLB2
DRAG SPECIALTIES
$91.97Protect your primary drivetrain from road debris, moisture, and contamination with the Drag Specialties Lower Belt Guard. This chrome-finished guard shields your belt and pulleys from the elements while maintaining the clean, classic aesthetics of your...19025123- SKU:
- 19025123
- Availability:
- Ships Same Business Day
- Weight:
- 1.22 LBS
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GUARD
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- LOWER
- TYPE:
- REAR BELT
$91.97 -
DRAG SPECIALTIES Inner Primary Bushing 292241
DRAG SPECIALTIES
$20.09The inner primary bushing is a high-wear component that directly affects clutch engagement smoothness and primary drive reliability. Over time, worn bushings create excessive play in your primary assembly, leading to inconsistent clutch feel and...21100035- SKU:
- 21100035
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- MATERIAL:
- STEEL
- UNITS:
- EACH
$20.09 -
DRAG SPECIALTIES Inner Primary Bushing 292240
DRAG SPECIALTIES
$20.09Inner primary bushings are critical wear components that take constant punishment from gear meshing and rotational forces in your primary drivetrain. A worn or damaged bushing introduces play into your primary assembly, causing noise, vibration, and...21100036- SKU:
- 21100036
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- BUSHING
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
$20.09 -
DRAG SPECIALTIES Outer Primary Bushing - '94-'06 292243
DRAG SPECIALTIES
$14.79Primary housing bushings wear down with every clutch engagement, leading to excessive play, noise, and potential drivetrain damage. This OEM-quality replacement from Drag Specialties restores proper bushing support and eliminates the slop that...21100037- SKU:
- 21100037
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BUSHING
- UNITS:
- EACH
- MATERIAL:
- STEEL
- TYPE:
- STARTER SHAFT
$14.79 -
DRAG SPECIALTIES Outer Primary Bushing - '89-'93 292242
DRAG SPECIALTIES
$14.79Primary case bushings are critical wear items that directly impact clutch engagement precision and powertrain longevity. Over time, steel bushings wear, causing excess play in your primary drive and compromising shift feel. This OEM-spec replacement...21100038- SKU:
- 21100038
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- STARTER SHAFT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- BUSHING
- UNITS:
- EACH
$14.79 -
DRAG SPECIALTIES One-Piece Sprocket Kit 191205
DRAG SPECIALTIES
$198.17If you're running a solid-steel sprocket setup, you know that traditional diaphragm spring compensators create noise and complexity you don't need. The DRAG SPECIALTIES One-Piece Sprocket Kit eliminates that friction—literally—by consolidating your...11200413- SKU:
- 11200413
- Availability:
- Ships Same Business Day
- Weight:
- 4.15 LBS
- PRODUCT NAME:
- SPROCKET KIT
- TYPE:
- PRIMARY
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
$198.17 -
DRAG SPECIALTIES Sprocket Kit 241336
DRAG SPECIALTIES
$361.38A properly sized sprocket kit is critical for maximizing your engine's power delivery and maintaining optimal chain tension across the entire RPM range. The DRAG SPECIALTIES Sprocket Kit 241336 delivers the precision engineering and durability required...11200435- SKU:
- 11200435
- Availability:
- Ships Same Business Day
- Weight:
- 10.71 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- SPROCKET KIT
- RIDING STYLE:
- STREET
$361.38 -
DRAG SPECIALTIES Compensating Sprocket Shaft Extension - +1" 346232
DRAG SPECIALTIES
$78.39Running a wide tire setup? This compensating sprocket shaft extension solves the offset transmission clearance issue without requiring custom fabrication. A precision-engineered solution that maintains sprocket alignment and drivetrain integrity when...11200001- SKU:
- 11200001
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- MATERIAL:
- STEEL
- SIZE IMPERIAL:
- +1'
- TYPE:
- COMPENSATING SPROCKET
- PRODUCT NAME:
- SHAFT EXTENSION
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$78.39 -
DRAG SPECIALTIES Primary Drive Kit 210186
DRAG SPECIALTIES
$953.95A reliable primary drive system is the foundation of consistent power delivery and smooth engagement in any high-performance application. The DRAG Specialties Primary Drive Kit 210186 delivers the precision components you need to maintain optimal clutch...11200076- SKU:
- 11200076
- Availability:
- Ships Same Business Day
- Weight:
- 22.75 LBS
- TOOTH COUNT:
- 25
- PRODUCT NAME:
- PRIMARY CHAIN DRIVE KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$953.95
