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 Outer Primary Cover - Chrome - Narrow Profile 77957
DRAG SPECIALTIES
$449.95The Drag Specialties Outer Primary Cover delivers a clean, finished appearance while protecting your primary drivetrain components from debris and weather exposure. Its narrow profile design integrates seamlessly with modern cruiser aesthetics without...11070536- SKU:
- 11070536
- Availability:
- Ships Same Business Day
- Weight:
- 6.45 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- NARROW
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
$449.95Qty in Cart: 0Quantity:Price:$449.95Subtotal: -
DRAG SPECIALTIES Outer Primary Cover - Black - Narrow Profile 77957B
DRAG SPECIALTIES
$458.95A properly finished primary cover protects your drivetrain components while maintaining the clean aesthetic your bike demands. The narrow profile design ensures a sleek appearance without sacrificing functionality or airflow around critical engine areas...11070537- SKU:
- 11070537
- Availability:
- Ships Same Business Day
- Weight:
- 6.15 LBS
- STYLE:
- NARROW
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
- COLOR/FINISH:
- SATIN BLACK
$458.95 -
DRAG SPECIALTIES Primary Cover - Chrome 63134
DRAG SPECIALTIES
$365.95A primary cover protects your engine's internal components from debris, moisture, and contaminants while maintaining a clean aesthetic on your motorcycle. Chrome finish provides corrosion resistance and a polished look that complements modern and classic...11070538- SKU:
- 11070538
- Availability:
- Ships Same Business Day
- Weight:
- 5.85 LBS
- TYPE:
- PRIMARY
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$365.95Qty in Cart: 0Quantity:Price:$365.95Subtotal: -
DRAG SPECIALTIES Primary Cover - Black 63134B
DRAG SPECIALTIES
$357.95A primary cover serves as the critical gateway between your engine's internals and the elements—protecting vital components from moisture, debris, and contamination while maintaining the clean aesthetic your bike demands. Drag Specialties' die-cast...11070539- SKU:
- 11070539
- Availability:
- Ships Same Business Day
- Weight:
- 5.60 LBS
- TYPE:
- PRIMARY
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$357.95 -
DRAG SPECIALTIES Split Skull Derby Cover - Chrome - 5-Hole 78043B2
DRAG SPECIALTIES
$71.95A quality derby cover protects your primary cover from road debris and weather while maintaining a polished appearance that matches your bike's aesthetic. The Split Skull design from Drag Specialties delivers that custom look without sacrificing...11070546- SKU:
- 11070546
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MODEL:
- SPLIT SKULL
- MOUNTING STYLE:
- 5 HOLE
- TYPE:
- DERBY
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$71.95 -
DRAG SPECIALTIES Split Skull Derby Cover - Black - 5-Hole 78043B
DRAG SPECIALTIES
$72.95A quality derby cover protects your primary cover from road debris, moisture, and UV damage while maintaining a cohesive aesthetic across your bike's drivetrain. The Drag Specialties Split Skull design delivers authentic styling that complements OEM and...11070547- SKU:
- 11070547
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- MODEL:
- SPLIT SKULL
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- DERBY
$72.95 -
DRAG SPECIALTIES Split Skull Derby Cover - Chrome - 3-Hole 78045
DRAG SPECIALTIES
$76.95A quality derby cover protects your engine's internal components from dust, debris, and moisture while maintaining the visual integrity of your build. The Drag Specialties Split Skull design delivers authentic aesthetic appeal without compromising...11070548- SKU:
- 11070548
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MODEL:
- SPLIT SKULL
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- DERBY COVER
- TYPE:
- DERBY
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$76.95 -
DRAG SPECIALTIES Split Skull Derby Cover - Black - 3-Hole 78045B
DRAG SPECIALTIES
$71.95The DRAG SPECIALTIES Split Skull Derby Cover delivers the iconic aesthetic your Harley demands while protecting critical engine components from debris and contamination. Die-cast construction ensures durability through countless rides, and the three-hole...11070549- SKU:
- 11070549
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- COLOR/FINISH:
- CHROME
- TYPE:
- DERBY
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 3 HOLE
- RIDING STYLE:
- STREET
- MODEL:
- SPLIT SKULL
$71.95 -
DRAG SPECIALTIES Split Skull Derby Cover - Chrome 78044
DRAG SPECIALTIES
$82.95A quality derby cover protects your engine's internal components from contamination while presenting a finished, cohesive look to your bike's top end. The Split Skull design from Drag Specialties delivers authentic styling that matches their complete...11070550- SKU:
- 11070550
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MODEL:
- SPLIT SKULL
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- DERBY COVER
- TYPE:
- DERBY
$82.95 -
DRAG SPECIALTIES Split Skull Derby Cover - Black 78044B
DRAG SPECIALTIES
$61.95A quality derby cover protects your engine's internal components from dust, debris, and weather while you're between rides. The Split Skull design from Drag Specialties delivers authentic styling that matches the rest of your custom Harley build without...11070551- SKU:
- 11070551
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MODEL:
- SPLIT SKULL
- TYPE:
- DERBY
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$61.95 -
DRAG SPECIALTIES Split Skull Derby Cover - Chrome 78046
DRAG SPECIALTIES
$74.95A quality derby cover protects your engine's internal components from moisture, debris, and contaminants while maintaining a clean, finished appearance. The DRAG Specialties Split Skull Derby Cover delivers both functional protection and distinctive...11070552- SKU:
- 11070552
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING STYLE:
- 5 HOLE
- MODEL:
- SPLIT SKULL
- TYPE:
- DERBY
$74.95 -
DRAG SPECIALTIES Split Skull Derby Cover - Black 78046B
DRAG SPECIALTIES
$74.95A quality derby cover protects your engine's primary cover from the elements while maintaining a cohesive aesthetic with the rest of your bike's styling. The Drag Specialties Split Skull design delivers unmistakable visual impact without compromising...11070553- SKU:
- 11070553
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- COLOR/FINISH:
- CHROME
- TYPE:
- DERBY
- MODEL:
- SPLIT SKULL
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$74.95 -
DRAG SPECIALTIES Rear Wheel Sprocket - 46-Tooth - Black 16427EB
DRAG SPECIALTIES
$96.25A worn or damaged rear sprocket directly compromises your bike's acceleration, top-end performance, and overall drivetrain efficiency. The DRAG SPECIALTIES 46-tooth rear sprocket delivers the reliable tooth engagement and durability demanded by riders...12101832- SKU:
- 12101832
- Availability:
- Ships Same Business Day
- Weight:
- 4.35 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 46
- MOUNTING POSITION:
- REAR
- OFFSET IMPERIAL:
- CENTERED
- STYLE:
- FLAT
- TYPE:
- DRIVE
- COLOR/FINISH:
- BLACK
- MATERIAL:
- CARBON STEEL
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$96.25 -
DRAG SPECIALTIES Rear Wheel Sprocket - 48-Tooth - Black 19366EB
DRAG SPECIALTIES
$96.25A worn or damaged rear sprocket directly impacts your bike's acceleration, top-end speed, and overall drivetrain efficiency. The DRAG SPECIALTIES 48-tooth rear sprocket is engineered from high-grade carbon steel to deliver consistent power transfer cycle...12101833- SKU:
- 12101833
- Availability:
- Ships Same Business Day
- Weight:
- 4.85 LBS
- MATERIAL:
- CARBON STEEL
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
- STYLE:
- FLAT
- COLOR/FINISH:
- BLACK
- OFFSET IMPERIAL:
- CENTERED
- TYPE:
- DRIVE
- UNITS:
- EACH
$96.25 -
DRAG SPECIALTIES Rear Wheel Sprocket - 49-Tooth - Black 71891EB
DRAG SPECIALTIES
$96.25A properly matched sprocket is fundamental to your transmission's efficiency and your bike's overall performance. This DRAG SPECIALTIES 49-tooth rear sprocket delivers the durability and precision fit your drivetrain demands, whether you're fine-tuning...12101834- SKU:
- 12101834
- Availability:
- Ships Same Business Day
- Weight:
- 5.10 LBS
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- TYPE:
- DRIVE
- UNITS:
- EACH
- MATERIAL:
- CARBON STEEL
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- MOUNTING POSITION:
- REAR
- OFFSET IMPERIAL:
- CENTERED
- RIDING STYLE:
- STREET
- STYLE:
- FLAT
$96.25 -
DRAG SPECIALTIES Rear Wheel Sprocket - 51-Tooth - Black 71891DE
DRAG SPECIALTIES
$96.25Precise gear ratios are fundamental to consistent acceleration and top-end performance in drag racing. This DRAG SPECIALTIES rear sprocket delivers the durability required for repeated launches and sustained high-RPM operation, while its CNC-manufactured...12101835- SKU:
- 12101835
- Availability:
- Ships Same Business Day
- Weight:
- 5.55 LBS
- MATERIAL:
- CARBON STEEL
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- UNITS:
- EACH
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- GLOSS
- COLOR/FINISH:
- BLACK
- OFFSET IMPERIAL:
- CENTERED
- STYLE:
- FLAT
- TYPE:
- DRIVE
$96.25Qty in Cart: 0Quantity:Price:$96.25Subtotal: -
DRAG SPECIALTIES Rear Wheel Sprocket - 46-Tooth - Black 19430EB
DRAG SPECIALTIES
$96.25A worn or damaged rear sprocket directly impacts your acceleration, top-end speed, and chain longevity. This DRAG SPECIALTIES 46-tooth replacement delivers consistent power transfer with minimal drivetrain slack, making it essential maintenance for any...12101836- SKU:
- 12101836
- Availability:
- Ships Same Business Day
- Weight:
- 4.15 LBS
- COLOR/FINISH:
- BLACK
- TYPE:
- DRIVE
- OFFSET IMPERIAL:
- 0.46'
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 46
- UNITS:
- EACH
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
- STYLE:
- DISHED
- MATERIAL:
- CARBON STEEL
- MOUNTING POSITION:
- REAR
$96.25 -
DRAG SPECIALTIES Rear Wheel Sprocket - 48-Tooth - Black 19217EB
DRAG SPECIALTIES
$89.83A worn or damaged rear sprocket directly impacts acceleration, fuel efficiency, and overall drivetrain reliability. The DRAG SPECIALTIES 48-tooth rear wheel sprocket delivers the exact OEM-equivalent performance and durability your motorcycle demands,...12101837- SKU:
- 12101837
- Availability:
- Ships Same Business Day
- Weight:
- 4.71 LBS
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- CARBON STEEL
- TOOTH COUNT:
- 48
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- GLOSS
- OFFSET IMPERIAL:
- 0.46'
- RIDING STYLE:
- STREET
- STYLE:
- DISHED
- UNITS:
- EACH
$89.83Qty in Cart: 0Quantity:Price:$89.83Subtotal: -
DRAG SPECIALTIES Rear Wheel Sprocket - 49-Tooth - Black 19432EB
DRAG SPECIALTIES
$93.04A properly matched rear sprocket is critical for optimizing your bike's acceleration, top-end speed, and overall driveability. The DRAG SPECIALTIES 49-tooth rear sprocket delivers reliable performance with high-grade carbon steel construction that...12101838- SKU:
- 12101838
- Availability:
- Ships Same Business Day
- Weight:
- 5.05 LBS
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- GLOSS
- OFFSET IMPERIAL:
- 0.46'
- RIDING STYLE:
- STREET
- STYLE:
- DISHED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- CARBON STEEL
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$93.04Qty in Cart: 0Quantity:Price:$93.04Subtotal: -
DRAG SPECIALTIES Rear Wheel Sprocket - 49-Tooth - Black 17512EB
DRAG SPECIALTIES
$89.83A worn or damaged rear sprocket directly impacts acceleration, top-end speed, and chain longevity. The DRAG SPECIALTIES 49-tooth rear sprocket delivers OEM-quality durability in a bolt-on replacement that restores optimal drivetrain performance without...12101842- SKU:
- 12101842
- Availability:
- Ships Same Business Day
- Weight:
- 4.35 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- CARBON STEEL
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
- STYLE:
- DISHED
- MOUNTING POSITION:
- REAR
- OFFSET IMPERIAL:
- 0.23'
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$89.83
