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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JOKER MACHINE Derby Cover - Black/Silver - Finned 10-690B
JOKER MACHINE
$144.95A quality derby cover protects your primary cover from road debris, weather, and oxidation while adding purposeful visual detail to your engine. The JOKER MACHINE finned design combines functional cooling benefits with clean aesthetics, giving your bike...11070167- SKU:
- 11070167
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK ANODIZED
- COLOR/FINISH:
- SILVER
- TYPE:
- DERBY
$144.95 -
JOKER MACHINE Inspection Cover - Chrome - Finned 06-95FN
JOKER MACHINE
$109.95A quality inspection cover does more than protect your engine—it completes the visual integrity of your build while providing functional access to critical components. The JOKER MACHINE Finned Inspection Cover combines polished chrome aesthetics with...11070108- SKU:
- 11070108
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- INSPECTION COVER
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
$109.95 -
JOKER MACHINE Derby Cover 06-98FN
JOKER MACHINE
$138.95A quality derby cover protects your engine's internal components from debris, moisture, and contamination while maintaining a finished appearance on your primary cover. The JOKER MACHINE Derby Cover 06-98FN is precision-engineered to fit Harley-Davidson...11070110- SKU:
- 11070110
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
- TYPE:
- DERBY
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
$138.95Qty in Cart: 0Quantity:Price:$138.95Subtotal: -
JOKER MACHINE Derby Cover 06-99FN
JOKER MACHINE
$191.95A derby cover protects your primary engine case from road debris, moisture, and premature wear while maintaining a clean, finished appearance on your motorcycle's left side. Whether you're running a stock engine or a custom build, the JOKER MACHINE Derby...11070113- SKU:
- 11070113
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- UNITS:
- EACH
- TYPE:
- DERBY
- MATERIAL:
- ALUMINUM
- STYLE:
- FINNED
- COLOR/FINISH:
- CHROME
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
$191.95Qty in Cart: 0Quantity:Price:$191.95Subtotal: -
JOKER MACHINE Derby Cover 06-99TC
JOKER MACHINE
$180.95A quality derby cover protects your primary case from road debris, moisture, and UV damage while maintaining a clean, finished appearance on your engine. The JOKER MACHINE Derby Cover 06-99TC combines robust construction with a sleek design that...11070208- SKU:
- 11070208
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 5 HOLE
$180.95 -
JOKER MACHINE Inspection Cover - Black/Silver - Finned 06-95TC
JOKER MACHINE
$98.95A quality inspection cover isn't just about aesthetics—it protects your engine's internals from debris and contamination while providing access for routine maintenance. The JOKER MACHINE Inspection Cover combines precision engineering with a distinctive...11070210- SKU:
- 11070210
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- INSPECTION COVER
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- STYLE:
- FINNED
- UNITS:
- EACH
$98.95 -
JOKER MACHINE Inspection Cover 10-667B
JOKER MACHINE
$43.95An engine inspection cover serves as both a protective barrier and a visual statement on your build. The JOKER MACHINE 10-667B replaces stock covers with precision-machined billet aluminum that withstands high heat, vibration, and repeated engine bay...11070293- SKU:
- 11070293
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 6061 T-6 ALUMINUM
- STYLE:
- JOKER™
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING STYLE:
- 2 HOLE
- TYPE:
- INSPECTION
$43.95 -
JOKER MACHINE Derby Cover - Flame 06-99F
JOKER MACHINE
$191.95Your engine's primary visual statement deserves the same attention to detail as your performance upgrades. The JOKER MACHINE Derby Cover in Flame styling delivers authentic custom aesthetics while protecting your clutch components from dust, debris, and...DS375057- SKU:
- DS375057
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- DERBY
- STYLE:
- FLAME
$191.95 -
JOKER MACHINE Derby Cover - Smooth 06-99S
JOKER MACHINE
$191.95The JOKER MACHINE Derby Cover – Smooth 06-99S delivers a clean, factory-finished look while protecting your primary cover from road debris and wear. This billet aluminum piece combines aesthetic refinement with functional durability, making it an...DS375060- SKU:
- DS375060
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- STYLE:
- SMOOTH
- RIDING STYLE:
- STREET
- TYPE:
- DERBY
- UNITS:
- EACH
$191.95 -
JOKER MACHINE Derby Cover - Flame 921017FC
JOKER MACHINE
$138.95A derby cover serves as both a functional and aesthetic component, protecting your primary cover while adding visual impact to your engine bay. The JOKER MACHINE Derby Cover elevates your bike's appearance with precision-crafted detailing and aggressive...DS375061- SKU:
- DS375061
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- STYLE:
- FLAME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$138.95 -
JOKER MACHINE Derby Cover - Smooth 921017C
JOKER MACHINE
$138.95A derby cover does more than protect your primary chaincase—it's a visual statement that separates a finished build from an incomplete one. The JOKER MACHINE Derby Cover delivers a clean, smooth aesthetic while safeguarding critical drivetrain components...DS375064- SKU:
- DS375064
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- DERBY
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- SMOOTH
$138.95Qty in Cart: 0Quantity:Price:$138.95Subtotal: -
JOKER MACHINE Inspection Cover - Hothead 921016HHC
JOKER MACHINE
$109.95Keep your engine bay looking sharp while maintaining quick access to vital inspection points. The JOKER MACHINE Hothead Inspection Cover delivers that clean, finished appearance without sacrificing functionality—ideal for show cars and serious builds...DS375066- SKU:
- DS375066
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- MATERIAL:
- 6061-T6 BILLET ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- INSPECTION
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- STYLE:
- HOTHEAD
$109.95 -
JOKER MACHINE Derby Cover - Lucky 7 06-99L
JOKER MACHINE
$191.95A derby cover serves as both a functional engine seal and a visual statement on your motorcycle. The JOKER MACHINE Lucky 7 delivers meticulous CNC-machined craftsmanship with a distinctive design that commands attention without sacrificing durability or...DS375260- SKU:
- DS375260
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- RIDING STYLE:
- STREET
- STYLE:
- LUCKY-7
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- TYPE:
- DERBY
$191.95 -
DRAG SPECIALTIES Clutch Hub 37550-84A-BXLB2
DRAG SPECIALTIES
$207.71Stock clutch hubs wear under aggressive riding and racing conditions, compromising power transfer and reliability when you need it most. This reinforced inner hub restores precision engagement and withstands the demands of high-performance clutch systems...DS195009- SKU:
- DS195009
- Availability:
- Ships Same Business Day
- Weight:
- 3.50 LBS
- PRODUCT NAME:
- INNER HUB
- UNITS:
- EACH
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
$207.71 -
DRAG SPECIALTIES Clutch Shell 148111-BX-LB2
DRAG SPECIALTIES
$283.59A worn or damaged clutch shell compromises your entire drivetrain's efficiency and reliability. This Drag Specialties replacement clutch shell restores proper engagement geometry and starter gear function, ensuring consistent power transfer and...DS195191- SKU:
- DS195191
- Availability:
- Ships Same Business Day
- Weight:
- 8.88 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- CLUTCH SHELL
- TYPE:
- CLUTCH
$283.59 -
DRAG SPECIALTIES Clutch Shell 148108-BX-LB2
DRAG SPECIALTIES
$343.39A worn or damaged clutch shell compromises your entire drivetrain's ability to transfer power efficiently, leading to slippage, noise, and potential catastrophic failure under load. This DRAG SPECIALTIES replacement clutch shell restores OEM-spec...DS195192- SKU:
- DS195192
- Availability:
- Ships Same Business Day
- Weight:
- 8.50 LBS
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- CLUTCH SHELL
$343.39 -
DRAG SPECIALTIES Compensating Sprocket Kit 241270-LBX1
DRAG SPECIALTIES
$308.41Compensating sprockets are critical for maintaining consistent engine timing and preventing chain stretch-induced performance loss on high-revving engines. This complete kit delivers the precision engineering needed to keep your drivetrain operating at...DS195197- SKU:
- DS195197
- Availability:
- Ships Same Business Day
- Weight:
- 5.70 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- SPROCKET KIT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 24
- TYPE:
- COMPENSATING
$308.41 -
DRAG SPECIALTIES Clutch Release Worm Gear 290220-BC105
DRAG SPECIALTIES
$34.93A worn or damaged clutch release worm gear compromises your ability to modulate clutch engagement smoothly, which is critical for precise launches and consistent performance in racing applications. This OEM-style replacement restores proper clutch lever...DS194975- SKU:
- DS194975
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- WORM GEAR
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH RELEASE
- UNITS:
- EACH
$34.93 -
DRAG SPECIALTIES Kickstarter Mainshaft Gear 292017-HC3
DRAG SPECIALTIES
$32.81A reliable kickstart system depends on a properly functioning mainshaft gear—this Drag Specialties replacement component restores the mechanical precision needed for consistent, effortless engagement. Whether you're rebuilding a kickstarter kit or...DS241029- SKU:
- DS241029
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GEAR
- TYPE:
- KICKSTART MAINSHAFT
- SIZE:
- STANDARD
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 16
$32.81 -
DRAG SPECIALTIES Sprocket Cover - 71-76 XL - Polished 301124-BX-LB2
DRAG SPECIALTIES
$81.27A quality sprocket cover protects your primary drivetrain from road debris and contamination while maintaining a clean, finished appearance on your classic Harley. This DRAG Specialties unit combines functional reinforcement with a polished aesthetic,...DS325289- SKU:
- DS325289
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- COLOR/FINISH:
- POLISHED
- PRODUCT NAME:
- COVER
- TYPE:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$81.27
