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
-
EASTERN MOTORCYCLE PARTS Clutch Hub Key A-37523-85
EASTERN MOTORCYCLE PARTS
$22.90A worn or damaged clutch hub key can cause timing issues, power loss, and unpredictable clutch engagement—problems that compound quickly under racing conditions. The EASTERN MOTORCYCLE PARTS Clutch Hub Key A-37523-85 delivers OEM-equivalent precision and...DS194361- SKU:
- DS194361
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
- TYPE:
- CLUTCH HUB
- PRODUCT NAME:
- KEY
- UNITS:
- 10 PACK
$22.90 -
EASTERN MOTORCYCLE PARTS Oil Pump Pinion Gear - Big Twin A-26349-73A
EASTERN MOTORCYCLE PARTS
$49.95A reliable oil pump pinion gear is critical to maintaining consistent oil pressure and protecting your Big Twin engine from premature wear. This OEM-equivalent component ensures proper lubrication under demanding riding conditions, whether you're...DS194007- SKU:
- DS194007
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- DRIVE GEAR
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- OIL PUMP
$49.95 -
EASTERN MOTORCYCLE PARTS Starter Gear W-14-219
EASTERN MOTORCYCLE PARTS
$55.95A reliable starter gear is foundational to consistent engine engagement—any wear or tooth damage compromises your bike's starting performance and can cascade into costlier drivetrain problems. The Eastern Motorcycle Parts W-14-219 delivers the precision...21100457- SKU:
- 21100457
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- KICKSTART MAINSHAFT
- PRODUCT NAME:
- GEAR
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
$55.95 -
EASTERN MOTORCYCLE PARTS Chain Tensioner Lock Tab A-39996-65
EASTERN MOTORCYCLE PARTS
$14.80A properly tensioned chain is fundamental to reliable motorcycle performance and longevity. This Eastern Motorcycle Parts chain tensioner lock tab secures your chain tension adjustment, preventing unwanted slippage that compromises power delivery and...11200189- SKU:
- 11200189
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- LOCK TAB
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY CHAIN
- TYPE:
- ADJUSTER PLATE
$14.80 -
EASTERN MOTORCYCLE PARTS Shifter Bushings A-34076-02A
EASTERN MOTORCYCLE PARTS
$16.10Shifter bushings are the unsung foundation of precise gear engagement—worn or degraded bushings introduce play in your shift lever, making it impossible to hit gates cleanly and compromising your lap times or daily reliability. The EASTERN MOTORCYCLE...11100049- SKU:
- 11100049
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$16.10 -
EASTERN MOTORCYCLE PARTS Shifter Shaft A-34628-86
EASTERN MOTORCYCLE PARTS
$68.95A reliable shifter shaft is critical to maintaining precise gear engagement and smooth shifting performance under racing conditions or spirited riding. The EASTERN MOTORCYCLE PARTS Shifter Shaft A-34628-86 meets or exceeds OEM standards, ensuring you get...11100050- SKU:
- 11100050
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SHIFT SHAFT
- UNITS:
- EACH
$68.95 -
EASTERN MOTORCYCLE PARTS Bearing A-9837
EASTERN MOTORCYCLE PARTS
$8.95Bearing failures cascade into catastrophic engine damage and costly downtime—the A-9837 is engineered to OEM specifications to keep your drivetrain reliable mile after mile. Whether you're replacing a worn original bearing or building a high-mileage...11100051- SKU:
- 11100051
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- TYPE:
- SHIFTER DRUM
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING
$8.95 -
EASTERN MOTORCYCLE PARTS Starter Bushing 42-0154
EASTERN MOTORCYCLE PARTS
$22.95A worn starter bushing creates excessive play in your starter motor, leading to grinding noise, unreliable starts, and premature wear on your flywheel or ring gear. The Eastern Motorcycle Parts 42-0154 is a precision replacement that restores proper...11120068- SKU:
- 11120068
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- BUSHING KIT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$22.95 -
EASTERN MOTORCYCLE PARTS Starter Ring Gear A-33163-65B
EASTERN MOTORCYCLE PARTS
$57.95A worn or damaged starter ring gear compromises your engine's ability to crank reliably, leaving you stranded or facing costly downtime. This Eastern Motorcycle Parts replacement delivers OEM-quality performance with a straightforward weld-on...11120039- SKU:
- 11120039
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- PRODUCT NAME:
- GEAR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- STARTER RING
$57.95 -
EASTERN MOTORCYCLE PARTS Ratchet Plate Rivets A-8215
EASTERN MOTORCYCLE PARTS
$2.95Ratchet plate rivets are critical fastening components in motorcycle assembly, particularly in clutch basket and primary drive systems where vibration and high-stress loads demand absolute reliability. These Eastern Motorcycle Parts rivets ensure secure,...11120040- SKU:
- 11120040
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- RIVET
- TYPE:
- KICKSTART RATCHET PLATE
- UNITS:
- 12 PACK
$2.95 -
EASTERN MOTORCYCLE PARTS Kick Pedal Rubber K-2-789
EASTERN MOTORCYCLE PARTS
$12.95A worn or damaged kick pedal rubber compromises both your control and safety, especially during aggressive riding or frequent use. The EASTERN MOTORCYCLE PARTS Kick Pedal Rubber K-2-789 restores factory-spec grip and responsiveness, ensuring consistent...11120042- SKU:
- 11120042
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- KICK PEDAL
- COLOR/FINISH:
- BLACK
- MATERIAL:
- RUBBER
$12.95 -
EASTERN MOTORCYCLE PARTS Motor Sprocket Shaft Spacers 40-0149
EASTERN MOTORCYCLE PARTS
$39.95Precision motor sprocket alignment is critical to drivetrain efficiency and longevity—even slight runout can accelerate wear on both sprockets and chain. The Eastern Motorcycle Parts Motor Sprocket Shaft Spacers (40-0149) ensure exact spacing between...11060074- SKU:
- 11060074
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- SPACER
- RIDING STYLE:
- STREET
- TYPE:
- SPROCKET SHAFT
- UNITS:
- EACH
$39.95 -
EASTERN MOTORCYCLE PARTS Retaining Rings - Clutch Bearing A-37905-90
EASTERN MOTORCYCLE PARTS
$16.10Clutch bearing retaining rings are critical for maintaining proper component alignment and preventing catastrophic bearing failure during high-demand riding. EASTERN MOTORCYCLE PARTS A-37905-90 rings deliver reliable retention under extreme loads,...11320284- SKU:
- 11320284
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- CLUTCH BEARING
- PRODUCT NAME:
- RETAINING RING
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$16.10 -
EASTERN MOTORCYCLE PARTS Mainshafter - Spacer A-33344-94
EASTERN MOTORCYCLE PARTS
$52.95A properly functioning mainshaft is the backbone of reliable 5-speed transmission performance, and worn or damaged spacers compromise shift quality and accelerate internal wear. The EASTERN MOTORCYCLE PARTS Mainshaft Spacer A-33344-94 is engineered to...DS194281- SKU:
- DS194281
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPACER
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
- STYLE:
- SPROCKET
$52.95 -
EASTERN MOTORCYCLE PARTS Bearing - 37906-11 A-37906-11
EASTERN MOTORCYCLE PARTS
$134.95A quality bearing is foundational to reliable motorcycle operation—premature wear leads to costly drivetrain damage and unpredictable handling. The Eastern Motorcycle Parts A-37906-11 is engineered to OEM specifications, ensuring smooth power delivery...11320919- SKU:
- 11320919
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH HUB
- UNITS:
- EACH
$134.95Qty in Cart: 0Quantity:Price:$134.95Subtotal: -
EASTERN MOTORCYCLE PARTS Bearing Inner Race A-34091-85
EASTERN MOTORCYCLE PARTS
$53.95A worn or damaged mainshaft bearing races can introduce play, noise, and potential transmission failure—compromising shift quality and overall drivetrain reliability. This Eastern Motorcycle Parts bearing inner race is a critical wear component that...DS194053- SKU:
- DS194053
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- FIFTH GEAR
- PRODUCT NAME:
- BEARING RACE
- STYLE:
- INNER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$53.95 -
EASTERN MOTORCYCLE PARTS Clutch Hub Keys A-37523-15
EASTERN MOTORCYCLE PARTS
$24.20Clutch hub keys are critical to maintaining proper clutch engagement and preventing slippage under load. A worn or damaged key compromises power transfer and can lead to erratic clutch behavior or complete failure. Eastern Motorcycle Parts' A-37523-15...DS194360- SKU:
- DS194360
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
- PRODUCT NAME:
- KEY
- UNITS:
- 10 PACK
- TYPE:
- CLUTCH HUB
$24.20 -
EASTERN MOTORCYCLE PARTS Bearing - 8992A A-8992A
EASTERN MOTORCYCLE PARTS
$26.95Bearing failures don't just compromise performance—they can compromise safety. The EASTERN MOTORCYCLE PARTS Bearing A-8992A is a direct OEM replacement engineered to restore original equipment reliability and precision fitment to your motorcycle's...11060070- SKU:
- 11060070
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- STYLE:
- OEM REPLACEMENT
$26.95 -
EASTERN MOTORCYCLE PARTS Mainshaft - Ball Bearing A-8996
EASTERN MOTORCYCLE PARTS
$43.95The mainshaft is the backbone of your transmission's power delivery—if it fails, your entire drivetrain is compromised. The EASTERN MOTORCYCLE PARTS A-8996 Mainshaft with ball bearing construction ensures smooth gear engagement and consistent performance...11060071- SKU:
- 11060071
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- STYLE:
- CLUTCH SIDE
- UNITS:
- EACH
- PRODUCT NAME:
- BALL BEARING
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
$43.95 -
EASTERN MOTORCYCLE PARTS Clutch Push Rod - 37092-06 A-37092-06
EASTERN MOTORCYCLE PARTS
$26.95A worn or damaged clutch push rod compromises your clutch engagement and can lead to inconsistent lever feel or complete clutch failure. The EASTERN MOTORCYCLE PARTS Clutch Push Rod (A-37092-06) restores precise actuation geometry, ensuring reliable...11320569- SKU:
- 11320569
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- CLUTCH
- PRODUCT NAME:
- PUSHROD CENTER
- LENGTH IMPERIAL:
- 11.700'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$26.95
