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
-
PAUGHCO Derby Cover 757
PAUGHCO
$69.95The PAUGHCO Derby Cover 757 delivers a clean, finished look to your primary cover while protecting internal components from dust and debris. Whether you're running stock Harley-Davidson internals or upgrading to a PAUGHCO outer primary cover, this derby...11070197- SKU:
- 11070197
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MOUNTING STYLE:
- 8 HOLE
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- UNITS:
- EACH
$69.95Qty in Cart: 0Quantity:Price:$69.95Subtotal: -
PAUGHCO Inspection Cover 758
PAUGHCO
$28.95Keep your primary drivetrain protected from contamination and mechanical damage with the PAUGHCO Inspection Cover 758. This purpose-built cover provides reliable access for routine maintenance while shielding critical components from dirt, debris, and...11070198- SKU:
- 11070198
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- MOUNTING STYLE:
- 2 HOLE
- TYPE:
- INSPECTION
$28.95Qty in Cart: 0Quantity:Price:$28.95Subtotal: -
PAUGHCO Outer Primary Cover 750
PAUGHCO
$314.95The PAUGHCO Outer Primary Cover 750 protects your primary drivetrain from contamination while maintaining proper oil circulation—essential for reliable performance during extended riding sessions. This domestically manufactured cover combines durability...11070189- SKU:
- 11070189
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- FEATURES:
- FOR USE WITHOUT COMPENSATING SPROCKET
- UNITS:
- EACH
$314.95 -
PBI Transmission Mainshaft Sprocket - 25-Tooth 279-25
PBI
$74.60A quality mainshaft sprocket is critical to reliable power delivery and chain longevity in high-performance applications. This PBI unit delivers precision engineering and domestic manufacturing at a price point that respects your budget. Whether you're...DS191025- SKU:
- DS191025
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- COLOR/FINISH:
- SILVER
- TOOTH COUNT:
- 25
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 530
- RIDING STYLE:
- STREET
$74.60 -
PBI Transmission Mainshaft Sprocket - 23-Tooth 279-23
PBI
$60.15A transmission mainshaft sprocket is your direct mechanical link between engine power and chain drive—any slop or weakness here compromises acceleration, handling, and reliability. The PBI 279-23 eliminates that weak link with precision-broached splines...DS191083- SKU:
- DS191083
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 23
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$60.15 -
PBI Transmission Mainshaft Sprocket - 24-Tooth 279-24
PBI
$60.15A transmission mainshaft sprocket is the direct link between your engine's power and your chain drive—compromising on this component means compromising acceleration, reliability, and your entire drivetrain's longevity. The PBI 279-24 is...DS191084- SKU:
- DS191084
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 530
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 24
$60.15 -
PBI Transmission Mainshaft Sprocket - 22-Tooth 278-22
PBI
$60.15A quality mainshaft sprocket is critical to reliable power transfer in high-performance transmissions. This PBI 22-tooth sprocket delivers the precision engineering and durability needed to handle sustained racing loads without slippage or premature wear...DS191086- SKU:
- DS191086
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 22
- UNITS:
- EACH
- CHAIN SIZE:
- 530
$60.15 -
PBI Transmission Mainshaft Sprocket - 23-Tooth 278-23
PBI
$60.15A quality transmission mainshaft sprocket is foundational to reliable power delivery and consistent shift performance under high-load conditions. The PBI 23-tooth sprocket delivers precision engineering with minimal runout, ensuring smooth engagement...DS191087- SKU:
- DS191087
- Availability:
- Ships Same Business Day
- Weight:
- 1.44 LBS
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- NATURAL
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 23
- PRODUCT NAME:
- SPROCKET
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
$60.15 -
PBI Transmission Mainshaft Sprocket - 24-Tooth 278-24
PBI
$60.15A quality mainshaft sprocket is the foundation of reliable power transfer in any high-performance drivetrain. The PBI 24-tooth sprocket delivers consistent engagement with zero play, ensuring your 530 chain stays true under load and acceleration. Built...DS191088- SKU:
- DS191088
- Availability:
- Ships Same Business Day
- Weight:
- 1.63 LBS
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- CHAIN SIZE:
- 530
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 24
- UNITS:
- EACH
$60.15Qty in Cart: 0Quantity:Price:$60.15Subtotal: -
PBI Transmission Mainshaft Sprocket - 20-Tooth - XL 277-20
PBI
$75.30A transmission mainshaft sprocket is the critical link between your engine's power and your drivetrain's efficiency. Worn or substandard sprockets introduce slack, missed shifts, and premature chain wear—all of which rob you of consistency on the track...DS191089- SKU:
- DS191089
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- TOOTH COUNT:
- 20
- TYPE:
- MAINSHAFT
- CHAIN SIZE:
- 530
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
$75.30 -
PBI Transmission Mainshaft Sprocket - 23-Tooth - XL 277-23
PBI
$86.80A transmission mainshaft sprocket is critical to power delivery and chain engagement in any high-performance drivetrain. This 23-tooth sprocket is precision-engineered to handle the demands of competitive racing and hard-use applications, ensuring...DS191092- SKU:
- DS191092
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 23
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- CHAIN SIZE:
- 530
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$86.80 -
PBI Offset Transmission Sprocket - 25-Tooth 302-25
PBI
$146.55Precise sprocket alignment is critical to chain longevity and power delivery in high-performance applications. The PBI 25-Tooth Offset Transmission Sprocket delivers exact fitment and durability through CNC-precision manufacturing and case-hardened steel...12120383- SKU:
- 12120383
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
- CHAIN SIZE:
- 530
- OFFSET IMPERIAL:
- 0.750'
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- COLOR/FINISH:
- NICKEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 25
- UNITS:
- EACH
$146.55 -
PBI Sprocket - Front - 20-Tooth 277X-20-520
PBI
$75.30Precision sprocket geometry directly impacts your power delivery and acceleration curve, making front sprocket selection critical to overall drivetrain performance. The PBI 20-tooth front sprocket is engineered for applications requiring aggressive...12120319- SKU:
- 12120319
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MATERIAL:
- CHROMOLY STEEL
- TYPE:
- CONVERSION
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 20
$75.30 -
PBI Sprocket - Front - 22-Tooth 277X-22-520
PBI
$75.95Fine-tune your bike's acceleration and top-end performance with precision sprocket engineering. A 22-tooth front sprocket adjusts your final drive ratio for track-specific conditions, giving you the ability to optimize for either quick acceleration or...12120321- SKU:
- 12120321
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 22
- UNITS:
- EACH
- MATERIAL:
- CHROMOLY STEEL
- TYPE:
- CONVERSION
- RIDING STYLE:
- STREET
$75.95Qty in Cart: 0Quantity:Price:$75.95Subtotal: -
PBI Offset Transmission Sprocket - 23-Tooth 284-23
PBI
$114.90Precision sprocket alignment is critical for consistent power delivery and extended drivetrain life—misalignment introduces vibration, accelerates wear, and costs you performance when it matters most. The PBI Offset Transmission Sprocket delivers exact...12120260- SKU:
- 12120260
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 530
- MATERIAL:
- STEEL
- OFFSET IMPERIAL:
- CENTERED
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
- TOOTH COUNT:
- 23
- COLOR/FINISH:
- NICKEL
- RIDING STYLE:
- STREET
$114.90 -
PBI Offset Transmission Sprocket - 22-Tooth 283-22
PBI
$108.90Precision chain alignment is critical for maximizing drivetrain efficiency and extending sprocket life, especially in high-stress racing applications. The PBI 22-Tooth Offset Transmission Sprocket delivers the exact geometry you need to fine-tune your...12120136- SKU:
- 12120136
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- CHAIN SIZE:
- 530
- TYPE:
- MAINSHAFT
- COLOR/FINISH:
- NICKEL
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 22
- MATERIAL:
- STEEL
- OFFSET IMPERIAL:
- 0.500'
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
$108.90 -
PBI Offset Transmission Sprocket - 25-Tooth 303-25
PBI
$130.90Chain alignment and sprocket offset are critical to transmission longevity and power delivery—misalignment accelerates wear on both sprocket and chain, robbing you of efficiency and reliability. The PBI Offset Transmission Sprocket gives you precise...12120524- SKU:
- 12120524
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- CHAIN SIZE:
- 530
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- NICKEL
- OFFSET IMPERIAL:
- 0.500'
- TOOTH COUNT:
- 25
- UNITS:
- EACH
$130.90 -
PBI Offset Transmission Sprocket - 26-Tooth 303-26
PBI
$130.90Precise sprocket alignment is non-negotiable in high-RPM racing applications where chain whip and wear can cost you races. The PBI 26-Tooth Offset Transmission Sprocket delivers exact positioning through CNC-machined construction and case-hardened...12120525- SKU:
- 12120525
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 530
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- NICKEL
- OFFSET IMPERIAL:
- 0.500'
- TOOTH COUNT:
- 26
$130.90 -
PBI Offset Transmission Sprocket - 24-Tooth 302-24
PBI
$141.40Precise sprocket alignment is critical for chain drive efficiency and component longevity in high-performance applications. The PBI 302-24 offset transmission sprocket corrects mainshaft geometry without requiring custom fabrication, giving you the exact...12120526- SKU:
- 12120526
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- COLOR/FINISH:
- NICKEL
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 530
- OFFSET IMPERIAL:
- 0.750'
- TOOTH COUNT:
- 24
- UNITS:
- EACH
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
$141.40 -
PBI Sprocket - Front - 23-Tooth 277X-23-520
PBI
$86.25Precision sprocket selection is fundamental to optimizing your drivetrain's power delivery and acceleration characteristics. This 23-tooth front sprocket from PBI delivers the engineering accuracy you need for consistent performance, whether you're...12120322- SKU:
- 12120322
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- TYPE:
- CONVERSION
- MATERIAL:
- CHROMOLY STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 23
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
$86.25
