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
-
On Sale
EASTERN MOTORCYCLE PARTS Clutch Push Rod - 37088-79 A-37088-79
EASTERN MOTORCYCLE PARTS
MSRP: $26.95Now: $24.52Was: $26.95A worn or damaged clutch push rod compromises your clutch engagement and creates unpredictable lever feel—exactly what you don't want in the saddle. This Eastern Motorcycle Parts push rod restores...DS192511- SKU:
- DS192511
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- PUSHROD CENTER
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- LENGTH IMPERIAL:
- 10.1250'
- UNITS:
- EACH
MSRP: $26.95Now: $24.52Was: $26.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Push Rod - 37088-84 A-37088-84
EASTERN MOTORCYCLE PARTS
MSRP: $26.95Now: $24.52Was: $26.95A worn or damaged clutch push rod compromises your clutch engagement and creates unpredictable lever feel—exactly what you don't need in the saddle. This OEM-specification Eastern Motorcycle Parts...DS192512- SKU:
- DS192512
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- PUSHROD CENTER
- RIDING STYLE:
- STREET
- LENGTH IMPERIAL:
- 10.3750'
- TYPE:
- CLUTCH
MSRP: $26.95Now: $24.52Was: $26.95Qty in Cart: 0Quantity:Price:MSRP: $26.95Now: $24.52Was: $26.95Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Push Rod - 37088-85 A-37088-85
EASTERN MOTORCYCLE PARTS
MSRP: $26.95Now: $24.52Was: $26.95A worn or damaged clutch push rod compromises your clutch engagement and creates inconsistent lever feel—exactly what you don't want when precision matters. This OEM Eastern Motorcycle Parts...DS192513- SKU:
- DS192513
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- PUSHROD CENTER
- LENGTH IMPERIAL:
- 11.1250'
- TYPE:
- CLUTCH
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $26.95Now: $24.52Was: $26.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Push Rod - 37088-87 A-37088-87
EASTERN MOTORCYCLE PARTS
MSRP: $26.95Now: $24.52Was: $26.95A worn or damaged clutch push rod compromises your bike's clutch engagement and creates unpredictable lever feel—exactly what you can't afford on the track or road. The EASTERN MOTORCYCLE PARTS...DS192514- SKU:
- DS192514
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- CLUTCH
- LENGTH IMPERIAL:
- 11.3750'
- PRODUCT NAME:
- PUSHROD CENTER
MSRP: $26.95Now: $24.52Was: $26.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Push Rod - 37088-90 A-37088-90
EASTERN MOTORCYCLE PARTS
MSRP: $26.95Now: $24.52Was: $26.95A worn or damaged clutch push rod compromises your clutch engagement and can leave you stranded. The EASTERN MOTORCYCLE PARTS Clutch Push Rod (A-37088-90) restores precise actuation and reliable...DS192515- SKU:
- DS192515
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- PUSHROD CENTER
- UNITS:
- EACH
- LENGTH IMPERIAL:
- 10.870'
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH
MSRP: $26.95Now: $24.52Was: $26.95Qty in Cart: 0Quantity:Price:MSRP: $26.95Now: $24.52Was: $26.95Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Push Rod - 37285-41 J-1-145
EASTERN MOTORCYCLE PARTS
MSRP: $31.95Now: $29.07Was: $31.95A worn or damaged clutch push rod compromises your clutch engagement and creates unpredictable lever feel—exactly what you don't need whether you're on the track or the street. This OEM-specification...DS192516- SKU:
- DS192516
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PUSHROD
- TYPE:
- CLUTCH
- LENGTH IMPERIAL:
- 13'
- UNITS:
- EACH
MSRP: $31.95Now: $29.07Was: $31.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Push Rod - 37285-65 J-1-146
EASTERN MOTORCYCLE PARTS
MSRP: $31.95Now: $29.07Was: $31.95A worn or damaged clutch push rod compromises your bike's clutch engagement and lever feel, leading to inconsistent power delivery and potential safety issues. The EASTERN MOTORCYCLE PARTS Clutch...DS192517- SKU:
- DS192517
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- LENGTH IMPERIAL:
- 13-1/4'
- PRODUCT NAME:
- PUSHROD
- TYPE:
- CLUTCH
MSRP: $31.95Now: $29.07Was: $31.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Push Rod - 37285-70 J-1-147
EASTERN MOTORCYCLE PARTS
MSRP: $31.95Now: $29.07Was: $31.95A worn or damaged clutch push rod compromises your bike's clutch engagement and disengagement, leading to inconsistent lever feel and potential drivetrain damage. The EASTERN MOTORCYCLE PARTS Clutch...DS192518- SKU:
- DS192518
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- LENGTH IMPERIAL:
- 13-15/16'
- PRODUCT NAME:
- PUSHROD
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $31.95Now: $29.07Was: $31.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Push Rod - 37285-75A J-1-148
EASTERN MOTORCYCLE PARTS
MSRP: $31.95Now: $29.07Was: $31.95A properly functioning clutch push rod is critical for consistent engagement and disengagement of your clutch system—any wear or deflection directly impacts your ability to shift smoothly and...DS192519- SKU:
- DS192519
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- PUSHROD
- TYPE:
- CLUTCH
- LENGTH IMPERIAL:
- 14-1/16'
MSRP: $31.95Now: $29.07Was: $31.95 -
On Sale
COLONY Kicker Spring Stud - 4-Speed 8119-1
COLONY
MSRP: $6.95Now: $6.26Was: $6.95The COLONY Kicker Spring Stud 8119-1 is an exact reproduction of the original fastener, engineered to restore proper spring tension and alignment in your 4-speed transmission assembly. Chrome plating...DS190024- SKU:
- DS190024
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- COLOR/FINISH:
- CHROME
- TYPE:
- KICKER SPRING
- PRODUCT NAME:
- STUD
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $6.95Now: $6.26Was: $6.95 -
On Sale
COLONY Transmission Stud - 3/8-16 x 3/8-24 9653-4
COLONY
MSRP: $19.95Now: $17.96Was: $19.95Transmission studs are critical fasteners that secure your transmission case and bell housing under extreme load and vibration. A compromised or failing stud can lead to catastrophic transmission...DS189937- SKU:
- DS189937
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- STYLE:
- REPLACEMENT
- TYPE:
- TRANSMISSION
- DIAMETER - THREAD SIZE:
- 3/8-24
- PRODUCT NAME:
- TRANSMISSION BOTTOM STUD
- UNITS:
- 4 PACK
- DIAMETER - THREAD SIZE:
- 3/8-16
MSRP: $19.95Now: $17.96Was: $19.95 -
On Sale
COLONY Transmission Stud - 7/16-14 x 3/8-24 9654-4
COLONY
MSRP: $20.95Now: $18.86Was: $20.95A transmission stud failure can sideline your build or cost you a race. The COLONY 7/16-14 x 3/8-24 transmission stud delivers the clamping force and reliability you need to keep your drivetrain...DS189936- SKU:
- DS189936
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- DIAMETER - THREAD SIZE:
- 3/8-24
- DIAMETER - THREAD SIZE:
- 7/16-14
- PRODUCT NAME:
- TRANSMISSION BOTTOM STUD
- STYLE:
- OVERSIZE
- STYLE:
- REPLACEMENT
- TYPE:
- TRANSMISSION
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
MSRP: $20.95Now: $18.86Was: $20.95 -
DRAG SPECIALTIES Chain Tensioner Mount 18120-BX-LB1
DRAG SPECIALTIES
$83.69A worn or antiquated chain tensioner can compromise drivetrain alignment and accelerate sprocket wear. This complete DRAG SPECIALTIES kit delivers a straightforward solution whether you're restoring...DS181201- SKU:
- DS181201
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- PRODUCT NAME:
- CHAIN ADJUSTER KIT
- MATERIAL:
- NYLON
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY CHAIN
- UNITS:
- KIT
$83.69 -
GARDNER-WESTCOTT Primary Cover Hardware P-10-24-08N
GARDNER-WESTCOTT
$67.95Your primary cover hardware is one of the first things fellow riders notice—and it's the first line of defense against dirt, debris, and moisture entering your engine. The GARDNER-WESTCOTT...DS175009- SKU:
- DS175009
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BOLT KIT
- COLOR/FINISH:
- CHROME
- TYPE:
- PRIMARY COVER
- MATERIAL:
- STEEL
- UNITS:
- KIT
$67.95Qty in Cart: 0Quantity:Price:$67.95Subtotal: -
GARDNER-WESTCOTT Primary Cover Hardware P-10-17-08
GARDNER-WESTCOTT
$67.95A quality primary cover hardware kit is essential for maintaining proper engine sealing and ensuring your cover fasteners won't corrode or seize over time. The GARDNER-WESTCOTT P-10-17-08 delivers...DS175008- SKU:
- DS175008
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- MATERIAL:
- STEEL
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- BOLT KIT
- RIDING STYLE:
- STREET
$67.95Qty in Cart: 0Quantity:Price:$67.95Subtotal: -
GARDNER-WESTCOTT Primary Cover Hardware P-10-18-08
GARDNER-WESTCOTT
$79.95If you're running a classic or custom engine build, OEM fasteners won't cut it—you need hardware that matches the quality of your work. The Gardner-Westcott Primary Cover Hardware Kit delivers...DS175007- SKU:
- DS175007
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- BOLT KIT
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal: -
On Sale
Jims 4-Speed Transmission Rebuild Kit for Harley-Davidson Electra Glide FLH 1980-1984 33031-80
JIMS
MSRP: $368.70Now: $331.83Was: $368.70Your Harley-Davidson's transmission is the backbone of reliable power delivery, and worn seals, gaskets, and bearings compromise both performance and longevity. The JIMS 4-Speed Transmission Rebuild...DS174298- SKU:
- DS174298
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION REBUILD
- UNITS:
- KIT
MSRP: $368.70Now: $331.83Was: $368.70 -
On Sale
Jims 4-Speed Transmission Rebuild Kit for 1977-1979 Harley-Davidson FXE Super Glide 33031-76L
JIMS
MSRP: $362.00Now: $325.80Was: $362.00A worn or damaged 4-speed transmission can rob your FXE of reliable power delivery and smooth shifting—costly problems on the road or track. The JIMS Rebuild Kit delivers every gasket, seal, shaft,...DS174297- SKU:
- DS174297
- Availability:
- Ships Same Business Day
- Weight:
- 2.06 LBS
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION REBUILD
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
MSRP: $362.00Now: $325.80Was: $362.00 -
On Sale
Jims 4-Speed Transmission Rebuild Kit for Harley FLH 1976-1977 33031-76E
JIMS
MSRP: $479.05Now: $431.15Was: $479.05A worn transmission is the quickest way to lose reliability and shift quality on your classic FLH. This JIMS rebuild kit supplies all the gaskets, seals, shafts, and internal clips needed to restore...DS174296- SKU:
- DS174296
- Availability:
- Ships Same Business Day
- Weight:
- 2.38 LBS
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION REBUILD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $479.05Now: $431.15Was: $479.05 -
On Sale
EASTERN MOTORCYCLE PARTS Transmission Drive Gear Spacer Keys A-35175-38
EASTERN MOTORCYCLE PARTS
Now: $11.01Was: $12.10Transmission drive gear spacer keys are critical wear components that maintain precise gear alignment and prevent slippage under load. If your transmission exhibits delayed engagement, gear grinding,...DS173417- SKU:
- DS173417
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- INSERT
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
Now: $11.01Was: $12.10
