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 Clutch Ramp Assembly 72781
DRAG SPECIALTIES
$43.41A worn or damaged clutch ramp assembly compromises your bike's engagement consistency and can lead to premature clutch failure—especially critical for high-performance riding. This precision DRAG SPECIALTIES replacement restores OEM-spec performance...DS194976- SKU:
- DS194976
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- PRODUCT NAME:
- RAMP ASSEMBLY
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH RELEASE
- UNITS:
- EACH
$43.41 -
On Sale
S&S CYCLE Transmission Side Cover 106-6479-00
S&S CYCLE
MSRP: $255.95Now: $230.36Was: $255.95If you're building a vintage-correct big-twin engine with modern reliability, this S&S Cycle transmission side cover delivers the aesthetic authenticity you want without compromising on engineering. The factory-inspired casting imperfections pair with...11070498- SKU:
- 11070498
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- COLOR/FINISH:
- UNFINISHED
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION END
- MOUNTING STYLE:
- 9 HOLE
MSRP: $255.95Now: $230.36Was: $255.95 -
On Sale
S&S CYCLE Inner Primary Bearing Race 56-5089
S&S CYCLE
MSRP: $81.95Now: $73.76Was: $81.95Bearing race movement in your primary drivetrain isn't just a minor issue—it's a path to catastrophic transmission seal failure and output bearing damage that can sideline your bike or cost thousands in repairs. The S&S Cycle Inner Primary Bearing Race...11200148- SKU:
- 11200148
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- PRODUCT NAME:
- BEARING RACE
- UNITS:
- EACH
MSRP: $81.95Now: $73.76Was: $81.95 -
On Sale
S&S CYCLE Transmission Countershaft Bearing 56-3031
S&S CYCLE
MSRP: $50.95Now: $45.86Was: $50.95Transmission countershaft bearings endure extreme rotational forces and wear faster than most internal drivetrain components—a failed bearing can leave you stranded or cause catastrophic internal damage. The S&S Cycle 56-3031 is a precision replacement...11060207- SKU:
- 11060207
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- TYPE:
- COUNTERSHAFT
- TYPE:
- TRANSMISSION
MSRP: $50.95Now: $45.86Was: $50.95 -
LA CHOPPERS County Line Derby Cover Derby Cover - M8 Softail - Black LA-P106-02B
LA CHOPPERS
$144.99Your M8 Softail's derby cover deserves better than stock. The LA CHOPPERS County Line Derby Cover upgrades that critical engine accent to machined billet aluminum, delivering a refined look that matches the rest of your County Line setup while providing...11070717- SKU:
- 11070717
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
$144.99 -
BAKER DRIVETRAIN Transmission Rebuild Kit - '91-'93 Dyna TRK-DYN-E
BAKER DRIVETRAIN
$379.00A worn transmission doesn't just lose efficiency—it develops bearing noise, rough shifts, and accelerated wear that compounds over time. The BAKER DRIVETRAIN Transmission Rebuild Kit gives you everything needed for a complete stock transmission refresh,...11040028- SKU:
- 11040028
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$379.00 -
DRAG SPECIALTIES Clutch Hub - Touring/Trike 148427
DRAG SPECIALTIES
$124.26A worn or compromised clutch hub can rob your touring bike of reliable engagement and create safety concerns on extended rides. The DRAG SPECIALTIES Clutch Hub delivers a reinforced inner design that withstands the demands of heavy-duty riding, whether...11321830- SKU:
- 11321830
- Availability:
- Ships Same Business Day
- Weight:
- 2.54 LBS
$124.26Qty in Cart: 0Quantity:Price:$124.26Subtotal: -
On Sale
Belt Drives Ltd Clutch Basket with Lockup for 2006 Harley-Davidson Street Glide FLHX CDB-2-90A
BELT DRIVES LTD.
MSRP: $1,304.15Now: $899.96Was: $1,304.15If you're running a 2006 Street Glide and want smooth, reliable clutch engagement without fighting the lever, this Belt Drives Ltd assembly delivers the power transfer you need. The ball-bearing lockup design generates 60% more surface contact than stock...11300686- SKU:
- 11300686
- Availability:
- Ships Same Business Day
- Weight:
- 14.25 LBS
MSRP: $1,304.15Now: $899.96Was: $1,304.15 -
LA CHOPPERS County Line Derby Cover Derby Cover - M8 Softail - Bronze LA-P106-02Z
LA CHOPPERS
$144.99The stock derby cover on your M8 Softail can look dated and doesn't offer the visual impact your bike deserves. LA CHOPPERS' County Line Derby Cover replaces it with precision-machined billet aluminum that coordinates seamlessly with the rest of the...11070724- SKU:
- 11070724
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
$144.99Qty in Cart: 0Quantity:Price:$144.99Subtotal: -
On Sale
BARNETT Extra Plate Clutch Kit - Carbon Fiber - Big Twin 307-30-20013
BARNETT
MSRP: $291.56Now: $262.40Was: $291.56A clutch that slips or chatters under load costs you consistency on the track and reliability on the street. The BARNETT Extra Plate Clutch Kit delivers the holding power and engagement precision that Big Twin riders demand, with carbon fiber plates...11313882- SKU:
- 11313882
- Availability:
- Ships Same Business Day
- Weight:
- 2.08 LBS
MSRP: $291.56Now: $262.40Was: $291.56Qty in Cart: 0Quantity:Price:MSRP: $291.56Now: $262.40Was: $291.56Subtotal: -
MUELLER MOTORCYCLE AG Power Clutch 2.0 - M8 with Bowden Cable 120-80
MUELLER MOTORCYCLE AG
$265.95Reduce clutch hand fatigue by nearly half with the MUELLER MOTORCYCLE AG Power Clutch 2.0, engineered to deliver smoother engagement and precise pressure control on every shift. Whether you're logging high-mileage track days or pushing through demanding...11300871- SKU:
- 11300871
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
$265.95 -
PAUGHCO Inner Primary Cover - Chrome 753E
PAUGHCO
$239.95The PAUGHCO Inner Primary Cover 753E protects your primary drive system while delivering a polished, factory-finished appearance that commands attention. Chrome plating resists corrosion and weathering, ensuring your investment maintains its aesthetic...11070188- SKU:
- 11070188
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
PBI Sprocket - Front - 19-Tooth 277X-19-520
PBI
$71.85Precision sprocket selection is critical to achieving optimal power delivery and maintaining chain tension across your drivetrain. This PBI 19-tooth front sprocket delivers the exacting tolerances and durability required for high-RPM applications,...12120318- SKU:
- 12120318
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MATERIAL:
- CHROMOLY STEEL
- TYPE:
- CONVERSION
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 19
$71.85 -
PBI Sprocket - Front - 21-Tooth 277X-21-520
PBI
$79.25Precision sprocket selection is critical to your drivetrain's efficiency and longevity. This PBI 21-tooth front sprocket delivers the exact gear ratio control you need for optimized acceleration, top-end performance, and chain longevity across racing and...12120320- SKU:
- 12120320
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPROCKET
- TYPE:
- CONVERSION
- UNITS:
- EACH
- MATERIAL:
- CHROMOLY STEEL
- TOOTH COUNT:
- 21
- RIDING STYLE:
- STREET
$79.25 -
PRO-ONE PERF.MFG. Derby Cover - Millennium - Smooth 202120
PRO-ONE PERF.MFG.
$115.45A derby cover serves as both protective barrier and visual statement on your engine—this billet aluminum piece shields critical internal components from debris and moisture while delivering clean aesthetics that complement any build. Pro-One's Millennium...DS375744- SKU:
- DS375744
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- UNITS:
- EACH
- MODEL:
- MILLENNIUM
- RIDING STYLE:
- STREET
- TYPE:
- DERBY
- COLOR/FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- STYLE:
- SMOOTH
$115.45 -
PRO-ONE PERF.MFG. Derby Cover - Millennium - Ball Milled 202130
PRO-ONE PERF.MFG.
$115.45A derby cover protects your engine's internal components from contamination and debris while adding a refined aesthetic to your motorcycle's top end. The PRO-ONE PERF.MFG. Millennium derby cover combines precision machining with durable billet aluminum...DS375745- SKU:
- DS375745
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- BALL-MILLED
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- MODEL:
- MILLENNIUM
- UNITS:
- EACH
$115.45 -
MUELLER MOTORCYCLE AG Power Clutch 120-10
MUELLER MOTORCYCLE AG
$247.95If you're tired of constant hand fatigue during long rides or spirited track sessions, the MUELLER Power Clutch 120-10 delivers a measurable solution. By replacing your OEM ramp assemblies with precision-engineered internals, this clutch reduces lever...11300003- SKU:
- 11300003
- Availability:
- Ships Same Business Day
- Weight:
- 0.53 LBS
- MODEL:
- POWER CLUTCH
- TYPE:
- MECHANICAL
- PRODUCT NAME:
- CLUTCH RAMP
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$247.95 -
TRASK Clutch Actuator Cover - Chrome - Hydraulic TM-2039CH
TRASK
$399.95Converting to hydraulic clutch actuation eliminates cable stretch and gives you consistent, predictable engagement—critical for high-horsepower builds where cable systems fail under load. This billet aluminum cover handles the transition cleanly while...11070406- SKU:
- 11070406
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- MOUNTING STYLE:
- 6 HOLE
- TRANSMISSION TYPE:
- 6-SPEED
- TYPE:
- TRANSMISSION SIDE
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$399.95 -
TRASK V-Rod Clutch Basket TM-2014
TRASK
$599.95Shaving 9 ounces from your primary drivetrain delivers measurable gains in throttle response and power delivery—especially critical in high-RPM applications where rotating mass directly impacts acceleration. The TRASK V-Rod Clutch Basket TM-2014 replaces...11320883- SKU:
- 11320883
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- PRODUCT NAME:
- CLUTCH BASKET
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
$599.95Qty in Cart: 0Quantity:Price:$599.95Subtotal: -
PANTHER Rear Drive Belt - 133-Tooth - 1 1/2" 62-0942
PANTHER
$302.62A worn or undersized rear drive belt compromises power delivery and accelerates wear on critical drivetrain components. The PANTHER 133-Tooth belt combines advanced tensile technology with proprietary compounds to eliminate stretch and shrinkage,...DS197005- SKU:
- DS197005
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- RIDING STYLE:
- STREET
- TYPE:
- REAR DRIVE
- UNITS:
- EACH
- TOOTH COUNT:
- 133
- WIDTH IMPERIAL:
- 1-1/2'
- PRODUCT NAME:
- BELT
$302.62
