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
-
PBI Offset Transmission Sprocket - 23-Tooth 283-23
PBI
$118.35Precision sprocket selection directly impacts your transmission's efficiency, longevity, and power delivery to the rear wheel. The PBI 23-Tooth Offset Transmission Sprocket delivers the durability and accuracy required for high-performance racing and...12120137- SKU:
- 12120137
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- CHAIN SIZE:
- 530
- TOOTH COUNT:
- 23
- TYPE:
- MAINSHAFT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- NICKEL
- RIDING STYLE:
- STREET
- OFFSET IMPERIAL:
- 0.500'
- UNITS:
- EACH
$118.35 -
PBI Transmission Mainshaft Sprocket - 19-Tooth - XL 277-19
PBI
$71.85A transmission mainshaft sprocket is critical to reliable power delivery in high-performance drivetrains—any runout or spline wear will compromise acceleration response and create dangerous drivetrain slack. The PBI 19-tooth sprocket eliminates these...DS191081- SKU:
- DS191081
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- SILVER
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 530
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 19
$71.85Qty in Cart: 0Quantity:Price:$71.85Subtotal: -
PBI Transmission Mainshaft Sprocket - 22-Tooth - XL 277-22
PBI
$82.80A transmission mainshaft sprocket is one of the most critical drivetrain components—it directly affects power delivery, acceleration response, and overall gear ratios in your racing setup. The PBI 22-Tooth XL 277-22 is precision-engineered from premium...DS191091- SKU:
- DS191091
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- CHAIN SIZE:
- 530
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 22
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
$82.80 -
PBI Offset Transmission Sprocket - 21-Tooth 281-21
PBI
$113.25Precision chain alignment is critical to maximizing drivetrain efficiency and extending sprocket life in high-performance applications. The PBI 21-Tooth Offset Transmission Sprocket delivers the exact geometric compensation needed to optimize your...PBI28121- SKU:
- PBI28121
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- MATERIAL:
- STEEL
- CHAIN SIZE:
- 530
- TYPE:
- MAINSHAFT
- COLOR/FINISH:
- NICKEL
- OFFSET IMPERIAL:
- 0.750'
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 21
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
$113.25 -
MOTOR TRIKE Mechanical Reverse Kit MTTR-0025
MOTOR TRIKE INC
$1,495.95Adding reverse capability to your trike dramatically expands its usability—no more awkward dismounts or manual repositioning in tight spaces. The MOTOR TRIKE Mechanical Reverse Kit MTTR-0025 delivers straightforward, reliable reverse operation without...11030031- SKU:
- 11030031
- Availability:
- Ships Same Business Day
- Weight:
- 7.10 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- MECHANICAL REVERSE KIT
- FEATURES:
- HYDRAULIC CLUTCH
- UNITS:
- KIT
- STYLE:
- REPLACEMENT
$1,495.95 -
TERRY COMPONENTS Starter Spacer 779000
TERRY COMPONENTS
$142.95When upgrading to a high-output aftermarket starter, the factory fuel filler neck often sits too close to the enlarged motor, creating clearance issues that compromise installation and aesthetics. The TERRY COMPONENTS Starter Spacer 779000 solves this...DS196233- SKU:
- DS196233
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- COLOR/FINISH:
- POLISHED
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- SPACER BLOCK
$142.95 -
PINGEL Rear Pulley Spacer 62051
PINGEL
$86.95Maximize your tire options without sacrificing rear-wheel fitment. The PINGEL Rear Pulley Spacer 62051 enables you to run wider 142mm tires while maintaining factory geometry and clearance—critical for drag racing, street performance, and competitive...12010098- SKU:
- 12010098
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MOUNTING POSITION:
- REAR
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- SPACER
- TYPE:
- PULLEY
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
$86.95Qty in Cart: 0Quantity:Price:$86.95Subtotal: -
PAUGHCO Inner Primary Cover - Chrome 752
PAUGHCO
$239.95The PAUGHCO Inner Primary Cover keeps your primary drivetrain protected from debris and contamination while maintaining a polished, factory-correct appearance. Whether you're running a stock setup or a high-performance build, this chrome cover shields...11070187- SKU:
- 11070187
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- INNER PRIMARY
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
PAUGHCO Outer Primary Cover 751
PAUGHCO
$314.95The PAUGHCO Outer Primary Cover 751 protects your primary drive system from debris, moisture, and contamination while maintaining a clean, factory-finished appearance. This cover is engineered to preserve primary component longevity and reduce...11070190- SKU:
- 11070190
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- FEATURES:
- FOR USE WITH COMPENSATING SPROCKET
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
$314.95 -
PAUGHCO Inner Primary Cover - Black B752
PAUGHCO
$251.95The PAUGHCO Inner Primary Cover B752 protects your primary drivetrain from contamination and heat while maintaining clean aesthetics on your build. This OEM-quality black cover integrates seamlessly with stock and custom primary assemblies, ensuring...11070191- SKU:
- 11070191
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
$251.95 -
PAUGHCO Inner Primary Cover - Black B753E
PAUGHCO
$251.95The PAUGHCO Inner Primary Cover serves as both a protective barrier and a finished aesthetic element for your primary drivetrain. A quality inner primary cover shields critical components from debris and contamination while maintaining a clean,...11070192- SKU:
- 11070192
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- COLOR/FINISH:
- GLOSS
$251.95Qty in Cart: 0Quantity:Price:$251.95Subtotal: -
PAUGHCO Outer Primary Cover B750
PAUGHCO
$317.95The PAUGHCO Outer Primary Cover B750 protects your primary drive system from contamination and heat while maintaining clean aesthetics on your build. This CNC-precision cover ensures reliable performance by sealing critical drivetrain components against...11070193- SKU:
- 11070193
- Availability:
- Ships Same Business Day
- Weight:
- 3.06 LBS
- FEATURES:
- FOR USE WITHOUT COMPENSATING SPROCKET
- COLOR/FINISH:
- GLOSS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
$317.95 -
PAUGHCO Derby Cover B757
PAUGHCO
$69.95The PAUGHCO Derby Cover B757 delivers clean, finished aesthetics to your primary cover while maintaining stock compatibility with Harley-Davidson applications. Whether you're running an OEM setup or upgrading to PAUGHCO's outer primary covers, this derby...11070195- SKU:
- 11070195
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- TYPE:
- DERBY
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- MOUNTING STYLE:
- 8 HOLE
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$69.95 -
PAUGHCO Inspection Cover B758
PAUGHCO
$32.95The PAUGHCO Inspection Cover B758 provides reliable access to your primary drive system while maintaining a clean, factory-correct appearance. Whether you're running stock Harley-Davidson components or upgraded PAUGHCO outer primary covers, this...11070196- SKU:
- 11070196
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MOUNTING STYLE:
- 2 HOLE
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- INSPECTION
$32.95 -
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
$314.95Qty in Cart: 0Quantity:Price:$314.95Subtotal: -
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
