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 Transmission Pulley - 32-Tooth D26-0141-32
DRAG SPECIALTIES
$126.21Precision belt drive systems demand a pulley engineered for consistent power transfer and extended service life under high-RPM loads. The DRAG Specialties 32-tooth transmission pulley delivers the durability and dimensional accuracy required for reliable...12030015- SKU:
- 12030015
- Availability:
- Ships Same Business Day
- Weight:
- 5.10 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- PULLEY
- TOOTH COUNT:
- 32
- TYPE:
- TRANSMISSION
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- FRONT
$126.21 -
On Sale
S&S CYCLE Final Drive Belt - 126-Tooth - 1 1/2" 106-0348
S&S CYCLE
MSRP: $287.95Now: $259.16Was: $287.95A properly functioning final drive belt is critical to transferring power reliably from your primary drive to the rear wheel. The S&S Cycle 126-tooth belt delivers consistent performance under sustained high-load conditions, whether you're running stock...12040093- SKU:
- 12040093
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- MATERIAL:
- X3N CARBON
- PRODUCT NAME:
- BELT
- TOOTH COUNT:
- 126
- TYPE:
- REAR DRIVE
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 1-1/2'
- RIDING STYLE:
- STREET
MSRP: $287.95Now: $259.16Was: $287.95Qty in Cart: 0Quantity:Price:MSRP: $287.95Now: $259.16Was: $287.95Subtotal: -
On Sale
S&S CYCLE Final Drive Belt - 128-Tooth - 1 1/2" 106-0350
S&S CYCLE
MSRP: $287.95Now: $259.16Was: $287.95A reliable final drive belt is essential for maintaining consistent power delivery and minimizing drivetrain wear on high-performance applications. The S&S Cycle 128-tooth belt uses Gates Carbon X3N material—engineered for superior strength and...12040095- SKU:
- 12040095
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- MATERIAL:
- X3N CARBON
- PRODUCT NAME:
- BELT
- TYPE:
- REAR DRIVE
- UNITS:
- EACH
- TOOTH COUNT:
- 128
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $287.95Now: $259.16Was: $287.95Qty in Cart: 0Quantity:Price:MSRP: $287.95Now: $259.16Was: $287.95Subtotal: -
On Sale
S&S CYCLE Final Drive Belt - 133-Tooth - 1 1/2" 106-0353
S&S CYCLE
MSRP: $292.95Now: $263.66Was: $292.95A properly tensioned final drive belt is critical to maintaining reliable power transfer in your drivetrain. S&S Cycle's 133-tooth belt uses Gates Carbon X3N material—engineered for the demands of high-performance applications where slack or slippage...12040098- SKU:
- 12040098
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- MATERIAL:
- X3N CARBON
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 133
- TYPE:
- REAR DRIVE
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 1-1/2'
- PRODUCT NAME:
- BELT
MSRP: $292.95Now: $263.66Was: $292.95Qty in Cart: 0Quantity:Price:MSRP: $292.95Now: $263.66Was: $292.95Subtotal: -
On Sale
S&S CYCLE Final Drive Belt - 136-Tooth - 1 1/2" 106-0355
S&S CYCLE
MSRP: $308.95Now: $278.06Was: $308.95A reliable final drive belt is critical to maintaining consistent power delivery and preventing catastrophic drivetrain failure. The S&S Cycle 136-tooth belt uses Gates Carbon X3N material—a premium compound engineered to resist heat, wear, and tensile...12040100- SKU:
- 12040100
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- TOOTH COUNT:
- 136
- RIDING STYLE:
- STREET
- MATERIAL:
- X3N CARBON
- PRODUCT NAME:
- BELT
- UNITS:
- EACH
- TYPE:
- REAR DRIVE
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $308.95Now: $278.06Was: $308.95Qty in Cart: 0Quantity:Price:MSRP: $308.95Now: $278.06Was: $308.95Subtotal: -
On Sale
S&S CYCLE Final Drive Belt - 128-Tooth - 1 1/8" 106-0358
S&S CYCLE
MSRP: $274.95Now: $247.46Was: $274.95A reliable final drive belt is critical to maintaining consistent power delivery and preventing unexpected drivetrain failure. The S&S Cycle 128-tooth belt uses Gates Carbon X3N material, engineered to withstand the thermal stress and centrifugal forces...12040103- SKU:
- 12040103
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- PRODUCT NAME:
- BELT
- TOOTH COUNT:
- 128
- WIDTH IMPERIAL:
- 1-1/8'
- TYPE:
- REAR DRIVE
- MATERIAL:
- X3N CARBON
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $274.95Now: $247.46Was: $274.95Qty in Cart: 0Quantity:Price:MSRP: $274.95Now: $247.46Was: $274.95Subtotal: -
On Sale
S&S CYCLE Final Drive Belt - 130-Tooth - 1 1/8" 106-0359
S&S CYCLE
MSRP: $284.95Now: $256.46Was: $284.95A reliable final drive belt is fundamental to consistent power delivery in any belt-drive system—wear or degradation directly impacts acceleration, efficiency, and overall drivability. The S&S Cycle 130-tooth belt uses Gates Carbon X3N material,...12040104- SKU:
- 12040104
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- TYPE:
- REAR DRIVE
- UNITS:
- EACH
- MATERIAL:
- X3N CARBON
- PRODUCT NAME:
- BELT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 130
- WIDTH IMPERIAL:
- 1-1/8'
MSRP: $284.95Now: $256.46Was: $284.95Qty in Cart: 0Quantity:Price:MSRP: $284.95Now: $256.46Was: $284.95Subtotal: -
DRAG SPECIALTIES Rear Pulley Spacer - 1.250" 193089
DRAG SPECIALTIES
$67.36When you're running a wide rear tire setup, proper wheel spacing is critical to avoid rubbing and maintain handling precision. The DRAG SPECIALTIES Rear Pulley Spacer provides the exact offset needed to accommodate aggressive tire widths while preserving...12010104- SKU:
- 12010104
- Availability:
- Ships Same Business Day
- Weight:
- 1.44 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PULLEY
- COLOR/FINISH:
- RAW
- MATERIAL:
- BILLET ALUMINUM
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPACER
- WIDTH IMPERIAL:
- 1.125'
$67.36Qty in Cart: 0Quantity:Price:$67.36Subtotal: -
DRAG SPECIALTIES Rear Pulley Spacer - .062" 26-0128-S16
DRAG SPECIALTIES
$19.21When upgrading to a wider rear tire, your stock pulley or sprocket alignment won't cut it—this spacer shim bridges that gap to maintain proper belt or chain tracking and prevent premature wear. The DRAG Specialties .062" spacer is a straightforward...12010231- SKU:
- 12010231
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- SPROCKET
- UNITS:
- EACH
- PRODUCT NAME:
- SPACER
- WIDTH IMPERIAL:
- 0.062'
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ZINC
- MATERIAL:
- STEEL
- TYPE:
- PULLEY
$19.21 -
DRAG SPECIALTIES Rear Pulley Spacer - .500" 26-0128-S50
DRAG SPECIALTIES
$21.35When you upgrade to a wider rear tire, your stock pulley or sprocket clearance becomes critical—this spacer shim closes that gap while maintaining proper alignment and belt/chain tension. The DRAG SPECIALTIES rear pulley spacer is a straightforward,...12010600- SKU:
- 12010600
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPACER
- WIDTH IMPERIAL:
- 0.500'
- COLOR/FINISH:
- ZINC
- TYPE:
- PULLEY
- RIDING STYLE:
- STREET
$21.35
