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
-
DRAG SPECIALTIES Primary Drive Kit 210184
DRAG SPECIALTIES
$531.43Kits include compensating sprocket assembly, chain adjuster assembly and complete clutch assembly with aramid friction plates, Primary chains sold separately11200078- SKU:
- 11200078
- Availability:
- Ships Same Business Day
- Weight:
- 21.75 LBS
- PRODUCT NAME:
- PRIMARY CHAIN DRIVE KIT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 37
- UNITS:
- KIT
$531.43 -
DRAG SPECIALTIES Kickstarter Pedal - Brass 361603
DRAG SPECIALTIES
$157.54Feature a heavy-duty construction made from brass with a steel liner core, Includes bushing and clip11120031- SKU:
- 11120031
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- RIDING STYLE:
- STREET
- TYPE:
- KICK PEDAL
- PRODUCT NAME:
- KICK PEDAL
- COLOR/FINISH:
- BRASS
- MATERIAL:
- BRASS
- UNITS:
- EACH
$157.54 -
DRAG SPECIALTIES Compensator Sprocket 241271
DRAG SPECIALTIES
$214.1934-tooth, High-quality steel construction11200304- SKU:
- 11200304
- Availability:
- Ships Same Business Day
- Weight:
- 5.40 LBS
- TYPE:
- COMPENSATING
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 34
- UNITS:
- EACH
$214.19 -
DRAG SPECIALTIES Outer Primary Cover - Chrome - '99-'06 FL 210207
DRAG SPECIALTIES
$425.34Die-cast aluminum construction, Hardware and bushing not included11070044- SKU:
- 11070044
- Availability:
- Ships Same Business Day
- Weight:
- 6.91 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
$425.34 -
DRAG SPECIALTIES Primary Cover 210304
DRAG SPECIALTIES
$367.66Die-cast aluminum construction, Inspection covers and derby covers are available separately11070105- SKU:
- 11070105
- Availability:
- Ships Same Business Day
- Weight:
- 5.87 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- PRIMARY
$367.66 -
DRAG SPECIALTIES Transmission Cover - Black 302125
DRAG SPECIALTIES
$76.17Mount with existing hardware, Not for use with hydraulic clutch.11070355- SKU:
- 11070355
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 6 HOLE
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- SATIN
- MATERIAL:
- ZINC
- TYPE:
- TRANSMISSION SIDE
$76.17Qty in Cart: 0Quantity:Price:$76.17Subtotal: -
DRAG SPECIALTIES Outer Primary Cover - Black - '99-'06 FL 210212
DRAG SPECIALTIES
$380.02Die-cast aluminum construction, Hardware and bushing not included11070356- SKU:
- 11070356
- Availability:
- Ships Same Business Day
- Weight:
- 6.40 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- SATIN BLACK
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
$380.02 -
DRAG SPECIALTIES Satin Black Derby Cover 301500
DRAG SPECIALTIES
$51.45Die-cast construction with a domed design, Includes mounting hardware, '06 Dyna Glide and all '07-'18 Big Twin (except '16-'18 Dressers, '15 FLHTCUL/ FLHTKL, '18 FLSB) applications will require the use of gasket part 0934-0289 or 0934-0788.11070440- SKU:
- 11070440
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- COLOR/FINISH:
- SATIN BLACK
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- RIDING STYLE:
- STREET
- MOUNTING STYLE:
- 6 HOLE
$51.45 -
DRAG SPECIALTIES Wrinkle Black Derby Cover 301498
DRAG SPECIALTIES
$68.96Die-cast construction with a domed design, Includes mounting hardware, '06 Dyna Glide and all '07-'18 Big Twin (except '16-'18 Dressers, '15 FLHTCUL/ FLHTKL, '18 FLSB) applications will require the use of gasket part 0934-0289 or 0934-0788.11070441- SKU:
- 11070441
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- COLOR/FINISH:
- WRINKLE BLACK
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
$68.96Qty in Cart: 0Quantity:Price:$68.96Subtotal: -
DRAG SPECIALTIES Primary Cover 210364
DRAG SPECIALTIES
$312.04Die-cast aluminum construction, Inspection covers and derby covers are available separately11070283- SKU:
- 11070283
- Availability:
- Ships Same Business Day
- Weight:
- 5.80 LBS
- TYPE:
- PRIMARY
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- SATIN
$312.04 -
DRAG SPECIALTIES Primary Cover 210306
DRAG SPECIALTIES
$412.98Die-cast aluminum construction, Inspection covers and derby covers are available separately11070284- SKU:
- 11070284
- Availability:
- Ships Same Business Day
- Weight:
- 5.80 LBS
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
$412.98Qty in Cart: 0Quantity:Price:$412.98Subtotal: -
DRAG SPECIALTIES Black Inspection Cover 210365
DRAG SPECIALTIES
$48.36Machined from billet aluminum11070286- SKU:
- 11070286
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- INSPECTION COVER
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- UNITS:
- KIT
$48.36 -
DRAG SPECIALTIES Gloss Black Derby Cover 301496
DRAG SPECIALTIES
$38.06Die-cast construction with a domed design, Includes mounting hardware, '06 Dyna Glide and all '07-'18 Big Twin (except '16-'18 Dressers, '15 FLHTCUL/ FLHTKL, '18 FLSB) applications will require the use of gasket part 0934-0289 or 0934-0788.11070287- SKU:
- 11070287
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- COLOR/FINISH:
- GLOSS BLACK
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
$38.06 -
DRAG SPECIALTIES Transmission Cover - Black 302164
DRAG SPECIALTIES
$85.44Beautifully complements other flat black engine and transmission pieces, Made from aluminum diecast ADC1211050241- SKU:
- 11050241
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION END
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$85.44 -
DRAG SPECIALTIES Clutch Hub 148421
DRAG SPECIALTIES
$189.47Improved inner clutch hub with reinforced insert, Accepts all OEM components11320944- SKU:
- 11320944
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- PRODUCT NAME:
- INNER HUB
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$189.47Qty in Cart: 0Quantity:Price:$189.47Subtotal: -
DRAG SPECIALTIES Rear Pulley Spacer - .500" 193085
DRAG SPECIALTIES
$44.67Used when installing a wide rear tire, Polished billet aluminum construction12010100- SKU:
- 12010100
- Availability:
- Ships Same Business Day
- Weight:
- 0.59 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- SPACER
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- TYPE:
- PULLEY
- WIDTH IMPERIAL:
- 0.500'
$44.67 -
DRAG SPECIALTIES Rear Pulley Insert - XL '04-'20 302220
DRAG SPECIALTIES
$109.15Precision-formed, chrome-plated rear pulley inserts, Designed to match OEM pulley, Fit the outer portions of the belt drive sprocket12010520- SKU:
- 12010520
- Availability:
- Ships Same Business Day
- Weight:
- 2.02 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PULLEY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- MODEL:
- PRECISION-FORMED
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
$109.15 -
DRAG SPECIALTIES Chrome Rear Pulley - 66-Tooth 191312
DRAG SPECIALTIES
$502.27Manufactured in the U.S.A. exclusively for Drag Specialties, Designed to complement the Drag Specialties laced wheel, Matching brake rotors available separately12010542- SKU:
- 12010542
- Availability:
- Ships Same Business Day
- Weight:
- 6.51 LBS
- COLOR/FINISH:
- CHROME
- TYPE:
- BELT DRIVE
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PULLEY
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 1.000'
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- STYLE:
- 10 SPOKE
- TOOTH COUNT:
- 66
$502.27Qty in Cart: 0Quantity:Price:$502.27Subtotal: -
DRAG SPECIALTIES Upper Belt Guard - 04-20 XL - Chrome 105053
DRAG SPECIALTIES
$106.03Simple bolt-on installation12020012- SKU:
- 12020012
- Availability:
- Ships Same Business Day
- Weight:
- 2.29 LBS
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- UPPER
- PRODUCT NAME:
- GUARD
- UNITS:
- EACH
- TYPE:
- REAR BELT
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
$106.03 -
DRAG SPECIALTIES Offset Sprocket Kit - 21-Tooth 191371-BX-LB1
DRAG SPECIALTIES
$45.71Allows installation of extra-wide tires, Kit include offset sprocket and machined spacerDS191056- SKU:
- DS191056
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- RIDING STYLE:
- STREET
- CHAIN SIZE:
- 530
- OFFSET IMPERIAL:
- 0.200'
- COLOR/FINISH:
- BLACK
- TOOTH COUNT:
- 21
- TYPE:
- MAINSHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- SPROCKET
$45.71
