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
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On Sale
EASTERN MOTORCYCLE PARTS Mainshaft - Ball Bearing - Clutch Side A-8978
EASTERN MOTORCYCLE PARTS
MSRP: $35.95Now: $32.71Was: $35.95A worn or damaged mainshaft bearing compromises your clutch engagement and shifts your power delivery away from the track. The EASTERN MOTORCYCLE PARTS Mainshaft Ball Bearing (A-8978) is engineered...11060034- SKU:
- 11060034
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PRODUCT NAME:
- BALL BEARING
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- STYLE:
- CLUTCH SIDE
- TYPE:
- MAINSHAFT
MSRP: $35.95Now: $32.71Was: $35.95 -
On Sale
EASTERN MOTORCYCLE PARTS Shifter Cam Thrust Washers A-33212-SET
EASTERN MOTORCYCLE PARTS
MSRP: $22.95Now: $20.88Was: $22.95Shifter cam thrust washers are critical wear components that directly affect shift quality and transmission longevity. Over time, these washers degrade under constant pressure and friction, leading...11060035- SKU:
- 11060035
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- THRUST WASHER
- TYPE:
- SHIFTER CAM
- RIDING STYLE:
- STREET
- UNITS:
- SET
MSRP: $22.95Now: $20.88Was: $22.95 -
On Sale
EASTERN MOTORCYCLE PARTS Bearing Housing Retaining Plate A-35111-36
EASTERN MOTORCYCLE PARTS
MSRP: $20.95Now: $19.06Was: $20.95The bearing housing retaining plate is a critical component that ensures precise alignment and secure retention of your bearing assembly under high-stress conditions. Whether you're running stock or...11060043- SKU:
- 11060043
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- BEARING HOUSING
- PRODUCT NAME:
- RETAINING PLATE
MSRP: $20.95Now: $19.06Was: $20.95 -
On Sale
EASTERN MOTORCYCLE PARTS Retainer With Oil Seal A-35150-52
EASTERN MOTORCYCLE PARTS
MSRP: $8.95Now: $8.14Was: $8.95Proper crankshaft sealing is critical to preventing oil leakage and maintaining engine integrity during high-RPM operation. This retainer with integrated oil seal ensures a secure fit and reliable...11060044- SKU:
- 11060044
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- FEATURES:
- INCLUDES SEAL
- PRODUCT NAME:
- RETAINER
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
MSRP: $8.95Now: $8.14Was: $8.95 -
On Sale
EASTERN MOTORCYCLE PARTS Roller Bearing A-9095-23
EASTERN MOTORCYCLE PARTS
MSRP: $22.95Now: $20.88Was: $22.95Precision roller bearings are critical to maintaining smooth, reliable operation in high-performance motorcycle applications. The EASTERN MOTORCYCLE PARTS Roller Bearing A-9095-23 delivers the tight...11060045- SKU:
- 11060045
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- ROLLER BEARING
- UNITS:
- 23 PACK
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
MSRP: $22.95Now: $20.88Was: $22.95 -
On Sale
EASTERN MOTORCYCLE PARTS Detent Spring A-34483-02
EASTERN MOTORCYCLE PARTS
Now: $4.19Was: $4.60A worn or damaged detent spring compromises your motorcycle's shift quality and can lead to missed gears or grinding transmission issues. The EASTERN MOTORCYCLE PARTS Detent Spring A-34483-02 is a...11060046- SKU:
- 11060046
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- STYLE:
- OEM REPLACEMENT
- TYPE:
- DETENT ARM SPRING
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPRING
Now: $4.19Was: $4.60 -
On Sale
EASTERN MOTORCYCLE PARTS Detent Arm Spring A-33374-00
EASTERN MOTORCYCLE PARTS
Now: $8.55Was: $9.40A worn or damaged detent arm spring compromises your transmission's shifting precision and can lead to costly internal damage if left unaddressed. This OEM replacement component restores positive...11060047- SKU:
- 11060047
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- STYLE:
- OEM REPLACEMENT
- TYPE:
- DETENT ARM SPRING
- UNITS:
- 10 PACK
- PRODUCT NAME:
- SPRING
- RIDING STYLE:
- STREET
Now: $8.55Was: $9.40 -
On Sale
EASTERN MOTORCYCLE PARTS Pressure Plate - 38010-41 A-38010-41
EASTERN MOTORCYCLE PARTS
MSRP: $16.95Now: $15.42Was: $16.95A worn or damaged pressure plate compromises your clutch engagement and throttle response, leading to slippage and reduced power transfer. The Eastern Motorcycle Parts pressure plate (A-38010-41)...11320573- SKU:
- 11320573
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- 3-STUD
- PRODUCT NAME:
- PRESSURE PLATE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- CLUTCH
MSRP: $16.95Now: $15.42Was: $16.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Springs - 37574-44 A-37574-44
EASTERN MOTORCYCLE PARTS
Now: $3.64Was: $4.00A properly secured clutch bearing plate is fundamental to reliable clutch operation and consistent engagement across gear changes. Eastern Motorcycle Parts' clutch springs ensure the bearing plate...11320621- SKU:
- 11320621
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- CLUTCH HUB
- TYPE:
- BEARING PLATE
- PRODUCT NAME:
- SPRING
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
Now: $3.64Was: $4.00 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Stud - 37583-41 - 3 Pack A-37583-41
EASTERN MOTORCYCLE PARTS
MSRP: $41.95Now: $38.17Was: $41.95Clutch hub studs are critical fastening components that bear constant rotational stress and vibration—wear or damage here compromises your entire clutch assembly's integrity. This 3-pack from Eastern...11320622- SKU:
- 11320622
- Availability:
- Ships Same Business Day
- Weight:
- 0.39 LBS
- TYPE:
- CLUTCH HUB
- UNITS:
- 3 PACK
- LENGTH IMPERIAL:
- 5-1/8'
- PRODUCT NAME:
- STUD
- RIDING STYLE:
- STREET
MSRP: $41.95Now: $38.17Was: $41.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Stud - 37585-41C - 7 Pack A-37585-41
EASTERN MOTORCYCLE PARTS
MSRP: $26.95Now: $24.52Was: $26.95Clutch studs are critical fasteners that bear enormous shear and tensile loads every time you engage or disengage your clutch. When studs wear, strip, or break, you lose clutch engagement reliability...11320623- SKU:
- 11320623
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- TYPE:
- CLUTCH HUB
- UNITS:
- 7 PACK
- LENGTH IMPERIAL:
- 3-11/16'
- PRODUCT NAME:
- STUD
- RIDING STYLE:
- STREET
MSRP: $26.95Now: $24.52Was: $26.95Qty in Cart: 0Quantity:Price:MSRP: $26.95Now: $24.52Was: $26.95Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Bearing - Clutch Hub A-37906-84
EASTERN MOTORCYCLE PARTS
MSRP: $47.95Now: $43.63Was: $47.95A worn or failing clutch hub bearing dramatically impacts your bike's clutch engagement, leading to slippage, difficulty shifting, and premature drivetrain wear. The Eastern Motorcycle Parts Bearing...11320624- SKU:
- 11320624
- Availability:
- Ships Same Business Day
- Weight:
- 0.58 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- CLUTCH HUB
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $47.95Now: $43.63Was: $47.95 -
On Sale
EASTERN MOTORCYCLE PARTS Bearing Guide A-36730-84
EASTERN MOTORCYCLE PARTS
MSRP: $22.95Now: $20.88Was: $22.95Precision bearing guidance is critical to maintaining proper wheel alignment and minimizing friction-induced wear on high-performance motorcycles. The Eastern Motorcycle Parts Bearing Guide...11320699- SKU:
- 11320699
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GUIDE
- TYPE:
- BEARING
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $22.95Now: $20.88Was: $22.95 -
On Sale
EASTERN MOTORCYCLE PARTS Bearing Guide - 36731-91 A-36731-91
EASTERN MOTORCYCLE PARTS
MSRP: $26.95Now: $24.52Was: $26.95A worn or damaged bearing guide compromises your motorcycle's precision and reliability—leading to increased friction, premature wear, and potential catastrophic failure. The EASTERN MOTORCYCLE PARTS...11320700- SKU:
- 11320700
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- CLUTCH
- PRODUCT NAME:
- GUIDE
- TYPE:
- BEARING
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $26.95Now: $24.52Was: $26.95 -
On Sale
EASTERN MOTORCYCLE PARTS Spring Seat - 36793-84 A-36793-84
EASTERN MOTORCYCLE PARTS
Now: $12.19Was: $13.40Worn or damaged spring seats compromise your motorcycle's suspension geometry and ride quality, leading to poor handling and accelerated wear on other components. Eastern Motorcycle Parts'...11320701- SKU:
- 11320701
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- SPRING SEAT
- RIDING STYLE:
- STREET
- TYPE:
- CENTER
- TYPE:
- CLUTCH
- UNITS:
- 5 PACK
Now: $12.19Was: $13.40 -
On Sale
EASTERN MOTORCYCLE PARTS Spring Seat - 36794-84 A-36794-84
EASTERN MOTORCYCLE PARTS
Now: $12.19Was: $13.40A worn or damaged spring seat compromises suspension geometry and ride quality, potentially leading to uneven spring seating and premature wear on other suspension components. This OEM replacement...11320702- SKU:
- 11320702
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- INNER
- PRODUCT NAME:
- SPRING SEAT
- TYPE:
- CLUTCH
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
Now: $12.19Was: $13.40 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Hub Nut - 37526-56A A-37526-56A
EASTERN MOTORCYCLE PARTS
MSRP: $14.95Now: $13.60Was: $14.95A worn or damaged clutch hub nut compromises your entire clutch assembly, leading to slippage, premature wear, and potential mid-ride failures. This Eastern Motorcycle Parts OEM-equivalent nut...11320704- SKU:
- 11320704
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- HUB NUT
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH
- UNITS:
- EACH
MSRP: $14.95Now: $13.60Was: $14.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Hub Nut - 37527-67 A-37527-67
EASTERN MOTORCYCLE PARTS
MSRP: $14.95Now: $13.60Was: $14.95A clutch hub nut is a critical fastening component that secures your clutch hub assembly and directly affects clutch engagement reliability and longevity. Failure or loosening of this nut can result...11320705- SKU:
- 11320705
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- HUB NUT
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH
MSRP: $14.95Now: $13.60Was: $14.95 -
On Sale
EASTERN MOTORCYCLE PARTS Backing Plate - 38005-74 A-38005-74
EASTERN MOTORCYCLE PARTS
MSRP: $43.95Now: $39.99Was: $43.95A worn or damaged brake backing plate compromises your braking system's structural integrity and thermal dissipation, directly affecting stopping power and safety. The Eastern Motorcycle Parts...11320707- SKU:
- 11320707
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- DIAMETER IMPERIAL:
- 6'
- UNITS:
- EACH
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BACKING PLATE
MSRP: $43.95Now: $39.99Was: $43.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Hub Spacers - 5707 - 5 Pack A-5707
EASTERN MOTORCYCLE PARTS
Now: $12.29Was: $13.50Clutch hub spacers are critical for maintaining proper clutch engagement and preventing plate slippage during hard acceleration or high-RPM shifts. A worn or incorrect stack height throws off your...11320658- SKU:
- 11320658
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- CLUTCH HUB
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPACER
- UNITS:
- 5 PACK
Now: $12.29Was: $13.50
