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
-
BARNETT Scorpion Clutch Plates 306-32-40243
BARNETT
$222.08BARNETT Scorpion clutch plates deliver consistent friction and durability for high-demand racing applications where margin for error is zero. These plates are engineered to handle repeated thermal cycles and aggressive engagement without glazing or...11310160- SKU:
- 11310160
- Availability:
- Ships Same Business Day
- Weight:
- 4.85 LBS
- MODEL:
- SCORPION
- DRIVE PLATE MATERIAL:
- STEEL
- FRICTION PLATE MATERIAL:
- DUPONT™ KEVLAR®
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PLATE SET
- TYPE:
- CLUTCH
- UNITS:
- SET
$222.08Qty in Cart: 0Quantity:Price:$222.08Subtotal: -
On Sale
Belt Drives Ltd 2" Belt Drive Kit for 1990-2006 Harley-Davidson Softail EV-600-B
BELT DRIVES LTD.
MSRP: $3,191.95Now: $2,872.76Was: $3,191.95If you're running a belt drive on your Softail, you know that smooth power transfer and reliable engagement are non-negotiable. The Belt Drives Ltd EV-600-B replaces worn or damaged drive systems with precision-engineered components built to handle...11200257- SKU:
- 11200257
- Availability:
- Ships Same Business Day
- Weight:
- 37.55 LBS
- STYLE:
- RIBBED
- MATERIAL:
- KEVLAR
- TOOTH COUNT:
- 142
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 2'
MSRP: $3,191.95Now: $2,872.76Was: $3,191.95Qty in Cart: 0Quantity:Price:MSRP: $3,191.95Now: $2,872.76Was: $3,191.95Subtotal: -
ARLEN NESS Derby Cover 700-005
ARLEN NESS
$169.95A derby cover does more than protect your primary cover—it's a statement of craftsmanship and attention to detail. The ARLEN NESS Derby Cover 700-005 combines precision machining with corrosion-resistant materials to deliver both functional protection...11070650- SKU:
- 11070650
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- MODEL:
- 10 GAUGE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ORANGE ANODIZED
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
$169.95 -
ARLEN NESS Derby Cover 700-004
ARLEN NESS
$169.95A quality derby cover protects your primary case from road debris and weather while maintaining the polished aesthetics of your build. The ARLEN NESS Derby Cover 700-004 delivers both functionality and style through precision CNC machining and premium...11070649- SKU:
- 11070649
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- COLOR/FINISH:
- GOLD ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- 10 GAUGE
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$169.95Qty in Cart: 0Quantity:Price:$169.95Subtotal: -
ARLEN NESS Derby Cover 700-003
ARLEN NESS
$169.95A quality derby cover protects your primary drivetrain while delivering the finished look your bike deserves. The ARLEN NESS Derby Cover 700-003 combines precision machining with durable construction, ensuring your engine compartment maintains both...11070648- SKU:
- 11070648
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- MODEL:
- 10 GAUGE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLUE ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$169.95Qty in Cart: 0Quantity:Price:$169.95Subtotal: -
ARLEN NESS Derby Cover 700-000
ARLEN NESS
$159.95A quality derby cover protects your engine's internal components from debris and moisture while providing a finished look to your bike's top end. The ARLEN NESS Derby Cover 700-000 combines precision machining with durable materials, giving you reliable...11070647- SKU:
- 11070647
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- 10 GAUGE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK ANODIZED
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MOUNTING STYLE:
- 5 HOLE
$159.95 -
BARNETT Derby Cover Spacer 686-30-16100
BARNETT
$82.04If you're installing a Barnett Scorpion Lock-up clutch in your FL Big Twin, this spacer kit is essential for proper derby cover fitment and seal integrity. The billet aluminum construction ensures precise tolerances while resisting wear, and the included...11070632- SKU:
- 11070632
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- RIDING STYLE:
- STREET
- TYPE:
- DERBY COVER
- PRODUCT NAME:
- SPACER
- UNITS:
- KIT
$82.04 -
ARLEN NESS Transmission Cover - Black 03-826
ARLEN NESS
$179.95The OEM transmission cover on your '14-up Touring model can show wear, leaks, or damage that compromises both aesthetics and function. The ARLEN NESS Transmission Cover delivers a precision-machined replacement that restores proper sealing while offering...11050244- SKU:
- 11050244
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- COLOR/FINISH:
- BLACK ANODIZED
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- STYLE:
- 10 GAUGE
- TYPE:
- TRANSMISSION
$179.95 -
ARLEN NESS Transmission Cover - Titanium 03-815
ARLEN NESS
$126.00The stock transmission cover is vulnerable to impact, road debris, and wear—leaving your drivetrain exposed. Upgrading to the ARLEN NESS Titanium Transmission Cover delivers OEM fitment with superior durability and a finished appearance that complements...11050243- SKU:
- 11050243
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- STYLE:
- 10 GAUGE
- TYPE:
- TRANSMISSION
- COLOR/FINISH:
- TITANIUM ANODIZED
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$126.00 -
ARLEN NESS Transmission Cover - Black 03-814
ARLEN NESS
$179.95The ARLEN NESS Transmission Cover transforms your transmission housing from a utilitarian component into a finished aesthetic element while protecting critical internals from debris and contamination. Whether you're running a '14-up Touring with fairing...11050242- SKU:
- 11050242
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK ANODIZED
- STYLE:
- 10 GAUGE
- TYPE:
- TRANSMISSION
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- MOUNTING STYLE:
- 6 HOLE
- UNITS:
- EACH
$179.95 -
ARLEN NESS Black 10 Gauge Top Transmission Cover 03-863
ARLEN NESS
$199.95A transmission cover serves as both a functional barrier and a visual statement on your bike. The ARLEN NESS Black 10 Gauge Top Transmission Cover protects your drivetrain while delivering the aggressive aesthetics that define quality custom builds...11050213- SKU:
- 11050213
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- MODEL:
- 10 GAUGE
- PRODUCT NAME:
- TOP COVER
- TYPE:
- TRANSMISSION
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 6 HOLE
- UNITS:
- EACH
$199.95 -
ARLEN NESS Chrome 10 Gauge Top Transmission Cover 03-862
ARLEN NESS
$199.95A transmission cover protects one of your engine's most critical components while serving as a visual anchor for your bike's aesthetic. The ARLEN NESS Chrome 10 Gauge Top Transmission Cover combines precision engineering with a polished finish that...11050212- SKU:
- 11050212
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- 10 GAUGE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MOUNTING STYLE:
- 6 HOLE
- UNITS:
- EACH
- PRODUCT NAME:
- TOP COVER
- TYPE:
- TRANSMISSION
$199.95 -
ACCUTRONIX Transmission Dipstick - Chrome - Big Twin TDS01-KC
ACCUTRONIX
$63.95A worn or discolored dipstick can detract from an otherwise pristine transmission area, and the ACCUTRONIX Transmission Dipstick in chrome delivers both visual refinement and reliable fluid-level monitoring. This bolt-on replacement is engineered to fit...11050215- SKU:
- 11050215
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- PRODUCT NAME:
- DIPSTICK
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- STYLE:
- KNURLED
$63.95 -
ACCUTRONIX Transmission Dipstick - Black - Big Twin TDS01-KN
ACCUTRONIX
$63.95A transmission dipstick might seem like a small detail, but a worn, discolored, or mismatched stick detracts from an otherwise clean engine bay. The ACCUTRONIX Transmission Dipstick replaces your stock unit with a sleek black finish that complements...11050216- SKU:
- 11050216
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- PRODUCT NAME:
- DIPSTICK
- UNITS:
- EACH
- TYPE:
- TRANSMISSION
- STYLE:
- KNURLED
- COLOR/FINISH:
- BLACK ANODIZED
- RIDING STYLE:
- STREET
$63.95 -
EBC Clutch Kit SRK7006
EBC
$308.88A worn or marginal clutch will cost you consistency on the track and reliability on the street. The EBC Clutch Kit SRK7006 delivers the holding power and thermal stability you need for sustained hard driving, whether you're pushing lap times or managing...11313271- SKU:
- 11313271
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- FRICTION PLATE SET
- PRODUCT NAME:
- CLUTCH KIT
$308.88 -
EBC Clutch Kit SRK7008
EBC
$354.17The EBC Clutch Kit SRK7008 delivers the engagement precision and thermal stability required for sustained high-performance driving, whether you're pushing limits on the street or attacking the track. Built with aramid fiber-lined friction plates and...11313273- SKU:
- 11313273
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- PRODUCT NAME:
- CLUTCH KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- FRICTION PLATE SET
$354.17 -
EBC Clutch Kit SRK7010
EBC
$349.34When you're pushing your vehicle to its limits on track or maximizing power delivery on the street, your factory clutch becomes the weak link. The EBC Clutch Kit SRK7010 delivers the holding power and durability required for serious driving, with a...11313275- SKU:
- 11313275
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
- PRODUCT NAME:
- CLUTCH KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- FRICTION PLATE SET
$349.34 -
Jims Primary Bearing Upgrade 1990-2006 Harley-Davidson Softail Springer 8960
JIMS
$51.00The primary bearing is your engine's foundation for efficient power transfer—when it wears, you're losing performance and risking catastrophic failure. The JIMS Primary Bearing Kit 8960 uses a double-row ball bearing design to handle high loads while...11200242- SKU:
- 11200242
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- BEARING KIT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
$51.00 -
Jims Fat 5 5-Speed Overdrive Super Kit 2002-2006 Harley-Davidson FLHR Road King 8274
JIMS
$3,947.55If you're running a stock transmission in your 2002-2006 Road King, you're leaving efficiency and performance on the table. The JIMS Fat 5 5-Speed Overdrive Super Kit transforms your drivetrain with a true overdrive 5th gear that drops RPMs on the...11030011- SKU:
- 11030011
- Availability:
- Ships Same Business Day
- Weight:
- 31.00 LBS
- FIFTH GEAR RATIO:
- 0.886:1
- RIDING STYLE:
- STREET
- STYLE:
- CUSTOM REPLACEMENT
- STYLE:
- OVERDRIVE
- THIRD GEAR RATIO:
- 1.31:1
- FIRST GEAR RATIO:
- 2.91:1
- PRODUCT NAME:
- TRANSMISSION KIT
- SECOND GEAR RATIO:
- 1.93:1
- TRANSMISSION TYPE:
- 5 SPEED
- FOURTH GEAR RATIO:
- 1.00:1
- MODEL:
- FAT 5
- TYPE:
- GEAR SET
- UNITS:
- KIT
$3,947.55Qty in Cart: 0Quantity:Price:$3,947.55Subtotal: -
Jims Shift Fork Shaft for Harley-Davidson 1987-2006 Big Twin 34088-87
JIMS
$30.50A worn or damaged shift fork shaft compromises your transmission's ability to engage gears smoothly and reliably—especially critical in high-RPM riding or racing conditions. The JIMS Shift Fork Shaft 34088-87 restores precise shifting action through...DS194250- SKU:
- DS194250
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SHIFT FORK SHAFT
- TRANSMISSION TYPE:
- 5 SPEED
- TRANSMISSION TYPE:
- 6 SPEED
- UNITS:
- EACH
- MATERIAL:
- STEEL
$30.50
