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 Pressure Plate 13421
DRAG SPECIALTIES
$41.15Highly polished aluminum pressure plate will not warp or flex, Allows smooth, positive clutch actionDS243375- SKU:
- DS243375
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- COLOR/FINISH:
- POLISHED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PRESSURE PLATE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- CLUTCH
$41.15Qty in Cart: 0Quantity:Price:$41.15Subtotal: -
DRAG SPECIALTIES Transmission Top Cover - Chrome 35-0027
DRAG SPECIALTIES
$82.35Beautifully complements other chrome or flat black engine and transmission pieces, Kit 2401-0618 includes two 1/4" - 24 long screws, OEM #1765W; nine 1/4" - 24 short screws, OEM #1766W and one breather screw, OEM #34720-56, Made in the U.S.A.11050034- SKU:
- 11050034
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- POWDER-COATED
- RIDING STYLE:
- STREET
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- COVER
- TYPE:
- TRANSMISSION TOP
- UNITS:
- EACH
$82.35 -
DRAG SPECIALTIES Transmission Cover - Chrome I30-0212
DRAG SPECIALTIES
$129.78Mount with existing hardware, Not for use with hydraulic clutch.11050035- SKU:
- 11050035
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ZINC
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- COVER
- TYPE:
- TRANSMISSION SIDE
- UNITS:
- EACH
$129.78 -
DRAG SPECIALTIES Transmission Top Cover - Black I35-0028MB
DRAG SPECIALTIES
$106.04Beautifully complements other chrome or flat black engine and transmission pieces, Kit 2401-0618 includes two 1/4" - 24 long screws, OEM #1765W; nine 1/4" - 24 short screws, OEM #1766W and one breather screw, OEM #34720-56, Made in the U.S.A.11050209- SKU:
- 11050209
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- POWDER-COATED
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP
$106.04 -
DRAG SPECIALTIES Transmission Top Cover I35-0029MB/G
DRAG SPECIALTIES
$115.31Die-cast construction, Include aluminum-coated black foam gasket (repl. OEM #25700453) and vent hose11050251- SKU:
- 11050251
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP
- UNITS:
- KIT
- COLOR/FINISH:
- MATTE BLACK
$115.31 -
DRAG SPECIALTIES Transmission Bearing 6207-2RS
DRAG SPECIALTIES
$34.59Single bearing11060010- SKU:
- 11060010
- Availability:
- Ships Same Business Day
- Weight:
- 1.07 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- MAINSHAFT
- PRODUCT NAME:
- BALL BEARING
$34.59 -
DRAG SPECIALTIES Skull Derby Cover - Chrome - 4 Hole 33-0063
DRAG SPECIALTIES
$95.74Die-cast construction, Skull protrudes outward about .750"11070034- SKU:
- 11070034
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- MOUNTING STYLE:
- 4 HOLE
- RIDING STYLE:
- STREET
- STYLE:
- 3-D SKULL
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$95.74 -
DRAG SPECIALTIES Outer Primary Cover - Chrome - '99-'06 Softail 11-0296K
DRAG SPECIALTIES
$400.62Rugged, die-cast aluminum construction, Starter shaft bushings included; seals and other components must be ordered separately to complete installation11070036- SKU:
- 11070036
- Availability:
- Ships Same Business Day
- Weight:
- 8.68 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$400.62 -
DRAG SPECIALTIES Outer Primary Cover - Chrome - '89-'93 Softail 11-0291K
DRAG SPECIALTIES
$400.62Rugged, die-cast aluminum construction, Starter shaft bushings included; seals and other components must be ordered separately to complete installation11070037- SKU:
- 11070037
- Availability:
- Ships Same Business Day
- Weight:
- 8.57 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
$400.62 -
DRAG SPECIALTIES Inner Primary Cover 11-0295K
DRAG SPECIALTIES
$409.89Rugged, die-cast aluminum construction with a chrome-plated finish, Starter shaft bushing included; seals and other components must be ordered separately to complete installation, Accept all OEM components11070038- SKU:
- 11070038
- Availability:
- Ships Same Business Day
- Weight:
- 11.42 LBS
- TYPE:
- INNER PRIMARY
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$409.89 -
DRAG SPECIALTIES Inner Primary Cover 11-0297K
DRAG SPECIALTIES
$407.83Rugged, die-cast aluminum construction with a chrome-plated finish, Starter shaft bushing included; seals and other components must be ordered separately to complete installation, Accept all OEM components11070045- SKU:
- 11070045
- Availability:
- Ships Same Business Day
- Weight:
- 11.75 LBS
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$407.83 -
DRAG SPECIALTIES 3 Hole Gold Live to Ride Derby Cover 33-0010DA
DRAG SPECIALTIES
$109.13Feature a detailed plated eagle and banner, Script is recessed11070156- SKU:
- 11070156
- Availability:
- Ships Same Business Day
- Weight:
- 0.72 LBS
- COLOR/FINISH:
- GOLD
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- DERBY COVER
- STYLE:
- EAGLE WITH BANNER
- MODEL:
- LIVE TO RIDE
- MOUNTING STYLE:
- 3 HOLE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$109.13 -
DRAG SPECIALTIES Sprocket Cover - Polished - '91-'03 XL 26-0408
DRAG SPECIALTIES
$113.25High-quality cast aluminum construction, Mount with existing OEM mounting hardware11070280- SKU:
- 11070280
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- COLOR/FINISH:
- POLISHED
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- TYPE:
- SPROCKET
$113.25 -
DRAG SPECIALTIES Sprocket Cover - Chrome - '91-'03 XL 26-0408C
DRAG SPECIALTIES
$109.13High-quality cast aluminum construction, Mount with existing OEM mounting hardware11070281- SKU:
- 11070281
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- RIDING STYLE:
- STREET
- TYPE:
- SPROCKET
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$109.13 -
DRAG SPECIALTIES Outer Primary Cover - Chrome - '06-'17 FXD D11-0299
DRAG SPECIALTIES
$520.10Rugged, die-cast aluminum construction, Starter shaft bushings included; seals and other components must be ordered separately to complete installation11070325- SKU:
- 11070325
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- MATERIAL:
- ALUMINUM
- TYPE:
- OUTER PRIMARY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$520.10 -
DRAG SPECIALTIES Primary Plug - 5/16"-18 11-0298P
DRAG SPECIALTIES
$18.49Zinc finish11070339- SKU:
- 11070339
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- COLOR/FINISH:
- ZINC
- UNITS:
- EACH
- PRODUCT NAME:
- DRAIN PLUG
- RIDING STYLE:
- STREET
$18.49 -
DRAG SPECIALTIES Wrinkle Black Derby Cover 33-0054WB
DRAG SPECIALTIES
$63.81Die-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 0934-0788.11070362- SKU:
- 11070362
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- COLOR/FINISH:
- WRINKLE BLACK
- MATERIAL:
- DIE-CAST
- MOUNTING STYLE:
- 5 HOLE
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$63.81Qty in Cart: 0Quantity:Price:$63.81Subtotal: -
DRAG SPECIALTIES Inspection Cover - Matte Black 14009B
DRAG SPECIALTIES
$23.64Machined from steel11070376- SKU:
- 11070376
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- MATTE BLACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- INSPECTION COVER
- TYPE:
- PRIMARY
- MOUNTING STYLE:
- 4 HOLE
- UNITS:
- EACH
- MATERIAL:
- STEEL
$23.64Qty in Cart: 0Quantity:Price:$23.64Subtotal: -
DRAG SPECIALTIES Gloss Black Derby Cover D33-0110GB
DRAG SPECIALTIES
$109.13Die-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 0934-0788.11070556- SKU:
- 11070556
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COLOR/FINISH:
- GLOSS BLACK
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- RIDING STYLE:
- STREET
- MOUNTING STYLE:
- 5 HOLE
$109.13 -
DRAG SPECIALTIES Wrinkle Black Derby Cover D33-0110WB
DRAG SPECIALTIES
$84.41Die-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 0934-0788.11070558- SKU:
- 11070558
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- COLOR/FINISH:
- WRINKLE BLACK
- MOUNTING STYLE:
- 5 HOLE
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$84.41
