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
-
On Sale
ARLEN NESS Derby Cover 700-022
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95Machined from 6061-T6 billet aluminum, Chrome hardware and gasket included, Matching point and inspection covers available separately, Sold each11070657- SKU:
- 11070657
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- COLOR/FINISH:
- RED ANODIZED
- RIDING STYLE:
- STREET
- STYLE:
- 10 GAUGE
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
MSRP: $169.95Now: $154.65Was: $169.95 -
On Sale
ARLEN NESS Derby Cover 700-017
ARLEN NESS
MSRP: $159.95Now: $145.55Was: $159.95Machined from 6061-T6 billet aluminum, Chrome hardware and gasket included, Matching point and inspection covers available separately, Sold each11070666- SKU:
- 11070666
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- PRODUCT NAME:
- DERBY COVER
- STYLE:
- 10 GAUGE
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
MSRP: $159.95Now: $145.55Was: $159.95 -
On Sale
ARLEN NESS Transmission Side Cover - Black - Cable 03-813
ARLEN NESS
MSRP: $179.95Now: $163.75Was: $179.95Carved from 6061 T-6 billet aluminum, Replaces OEM cover, Includes necessary gaskets and hardware11050108- SKU:
- 11050108
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 6 HOLE
- STYLE:
- 10 GAUGE
- TYPE:
- TRANSMISSION
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- PRODUCT NAME:
- SIDE COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $179.95Now: $163.75Was: $179.95 -
On Sale
ARLEN NESS Transmission Cover - Chrome 03-822
ARLEN NESS
MSRP: $179.95Now: $163.75Was: $179.95Replaces the OEM cover, Includes necessary gaskets and hardware, Matching transmission top covers sold separately, Hydraulic style cover mounts on top of OEM hydraulic unit found on '14-up Touring models with fairing, Cable style cover replaces the OEM...11050109- SKU:
- 11050109
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- STYLE:
- 10 GAUGE
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
MSRP: $179.95Now: $163.75Was: $179.95 -
On Sale
ARLEN NESS Chrome 10 Gauge Top Transmission Cover 03-852
ARLEN NESS
MSRP: $179.95Now: $163.75Was: $179.95Machined from billet aluminum, Includes necessary gasket and hardware11050111- SKU:
- 11050111
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- 10 GAUGE
- PRODUCT NAME:
- TOP COVER
- TYPE:
- TRANSMISSION
- UNITS:
- EACH
MSRP: $179.95Now: $163.75Was: $179.95 -
On Sale
ARLEN NESS Transmission Cover - Titanium 03-855
ARLEN NESS
MSRP: $179.95Now: $163.75Was: $179.95Replaces OEM transmission side cover, Includes necessary gaskets and hardware11050247- SKU:
- 11050247
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- TITANIUM ANODIZED
- MATERIAL:
- 6061 T-6 ALUMINUM
- STYLE:
- 10 GAUGE
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
MSRP: $179.95Now: $163.75Was: $179.95 -
On Sale
ARLEN NESS Transmission Cover - Titanium 03-865
ARLEN NESS
Now: $133.77Was: $147.00Replaces OEM transmission side cover, Includes necessary gaskets and hardware11050249- SKU:
- 11050249
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- COLOR/FINISH:
- TITANIUM ANODIZED
- MATERIAL:
- 6061 T-6 ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- 10 GAUGE
- TYPE:
- TRANSMISSION
- MOUNTING STYLE:
- 6 HOLE
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
Now: $133.77Was: $147.00 -
On Sale
ARLEN NESS Derby Cover 700-016
ARLEN NESS
MSRP: $159.95Now: $145.55Was: $159.95Machined from 6061-T6 billet aluminum, Chrome hardware and gasket included, Matching point and inspection covers available separately, Sold each11070653- SKU:
- 11070653
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- DERBY COVER
- COLOR/FINISH:
- BLACK ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- STYLE:
- 10 GAUGE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $159.95Now: $145.55Was: $159.95 -
On Sale
ARLEN NESS Derby Cover 700-020
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95Machined from 6061-T6 billet aluminum, Chrome hardware and gasket included, Matching point and inspection covers available separately, Sold each11070655- SKU:
- 11070655
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- DERBY COVER
- STYLE:
- 10 GAUGE
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- GOLD ANODIZED
MSRP: $169.95Now: $154.65Was: $169.95 -
On Sale
ARLEN NESS Derby Cover 700-023
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95Machined from 6061-T6 billet aluminum, Chrome hardware and gasket included, Matching point and inspection covers available separately, Sold each11070658- SKU:
- 11070658
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- COLOR/FINISH:
- TITANIUM ANODIZED
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- STYLE:
- 10 GAUGE
MSRP: $169.95Now: $154.65Was: $169.95 -
On Sale
ARLEN NESS Derby Cover - Black 700-002
ARLEN NESS
MSRP: $159.95Now: $145.55Was: $159.95Machined from 6061-T6 billet aluminum, Chrome hardware and gasket included, Matching point and inspection covers available separately, Sold each11070663- SKU:
- 11070663
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MODEL:
- 10 GAUGE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- SILVER
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- BLACK ANODIZED
MSRP: $159.95Now: $145.55Was: $159.95 -
On Sale
ARLEN NESS Derby Cover - Chrome 700-001
ARLEN NESS
MSRP: $159.95Now: $145.55Was: $159.95Machined from 6061-T6 billet aluminum, Chrome hardware and gasket included, Matching point and inspection covers available separately, Sold each11070664- SKU:
- 11070664
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MODEL:
- 10 GAUGE
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
MSRP: $159.95Now: $145.55Was: $159.95Qty in Cart: 0Quantity:Price:MSRP: $159.95Now: $145.55Was: $159.95Subtotal: -
On Sale
ARLEN NESS Derby Cover 700-018
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95Machined from 6061-T6 billet aluminum, Chrome hardware and gasket included, Matching point and inspection covers available separately, Sold each11070665- SKU:
- 11070665
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- BLACK ANODIZED
- STYLE:
- 10 GAUGE
MSRP: $169.95Now: $154.65Was: $169.95 -
DRAG SPECIALTIES Clutch Shell 148111-BX-LB2
DRAG SPECIALTIES
$317.19Replacement clutch shell with starter gearDS195191- SKU:
- DS195191
- Availability:
- Ships Same Business Day
- Weight:
- 8.88 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- CLUTCH SHELL
- TYPE:
- CLUTCH
$317.19 -
DRAG SPECIALTIES Clutch Shell 148108-BX-LB2
DRAG SPECIALTIES
$333.67Replacement clutch shell with starter gearDS195192- SKU:
- DS195192
- Availability:
- Ships Same Business Day
- Weight:
- 8.50 LBS
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- CLUTCH SHELL
$333.67 -
DRAG SPECIALTIES Compensating Sprocket Kit 241270-LBX1
DRAG SPECIALTIES
$299.68Complete kits contain a high-quality sprocket, sprocket shaft extension, sliding cam, sprocket nut and cover with spring plateDS195197- 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
$299.68 -
DRAG SPECIALTIES Clutch Release Worm Gear 290220-BC105
DRAG SPECIALTIES
$33.94Replacement clutch release worm gear and leverDS194975- SKU:
- DS194975
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- WORM GEAR
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH RELEASE
- UNITS:
- EACH
$33.94 -
DRAG SPECIALTIES Kickstarter Mainshaft Gear 292017-HC3
DRAG SPECIALTIES
$31.88Replacement Kickstart Mainshaft Gear for Drag Specialties Kickstarter KitDS241029- 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
$31.88 -
DRAG SPECIALTIES Sprocket Cover - 71-76 XL - Polished 301124-BX-LB2
DRAG SPECIALTIES
$78.99Reinforced, high-strength aluminum sprocket cover with a polished finished, Includes a bronze starter shaft bushingDS325289- 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
$78.99 -
DRAG SPECIALTIES Transmission End Cover Filler Cap 292032-HC3
DRAG SPECIALTIES
$12.31Replacement filler cap for transmission end cover, Equal or superior to stock componentsDS325518- SKU:
- DS325518
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CAP
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION END
$12.31
