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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EASTERN MOTORCYCLE PARTS Retaining Rings - Clutch Bearing A-37904-90
EASTERN MOTORCYCLE PARTS
$14.80Clutch bearing retaining rings are critical components that secure your clutch assembly under extreme rotational stress and repeated engagement cycles. A worn or failed retaining ring can lead to...11320280- SKU:
- 11320280
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- RETAINING RING
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH BEARING
$14.80 -
EASTERN MOTORCYCLE PARTS Retaining Rings - Clutch Bearing A-37905-00
EASTERN MOTORCYCLE PARTS
$17.50Clutch bearing retention is critical to maintaining drivetrain integrity under load, and a failed retaining ring can result in catastrophic component separation. EASTERN MOTORCYCLE PARTS A-37905-00...11320281- SKU:
- 11320281
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- RETAINING RING
- TYPE:
- CLUTCH BEARING
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$17.50 -
EASTERN MOTORCYCLE PARTS Retaining Rings - Pressure Plate A-37908-90
EASTERN MOTORCYCLE PARTS
$17.50A quality retaining ring is critical to maintaining clutch integrity and preventing catastrophic component separation during high-load riding or racing conditions. The Eastern Motorcycle Parts...11320282- SKU:
- 11320282
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- PRESSURE PLATE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- RETAINING RING
- UNITS:
- 5 PACK
$17.50 -
EASTERN MOTORCYCLE PARTS Retaining Rings - Pressure Plate A-37909-90
EASTERN MOTORCYCLE PARTS
$17.50A properly functioning clutch system demands precision components that can withstand repeated engagement cycles and high torque loads. The EASTERN MOTORCYCLE PARTS Retaining Rings (A-37909-90) secure...11320283- SKU:
- 11320283
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- RETAINING RING
- TYPE:
- PRESSURE PLATE
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$17.50 -
EASTERN MOTORCYCLE PARTS Retaining Rings - Clutch Ramp A-10998
EASTERN MOTORCYCLE PARTS
$6.70Clutch ramp retaining rings are a critical fastening component that keeps your clutch assembly secure under extreme load and rotational stress. A failed retaining ring can result in catastrophic...11320286- SKU:
- 11320286
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- RETAINING RING
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH RAMP
$6.70Qty in Cart: 0Quantity:Price:$6.70Subtotal: -
EASTERN MOTORCYCLE PARTS Push Rod Bearing - 37312-75 A-37312-75
EASTERN MOTORCYCLE PARTS
$10.95Push rod bearings are critical wear components that directly impact valve train reliability and engine longevity. A worn or failing bearing compromises valve timing precision and can lead to...11320568- SKU:
- 11320568
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH PUSHROD
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
EASTERN MOTORCYCLE PARTS Push Rod Kit J-1-159
EASTERN MOTORCYCLE PARTS
$70.95Push rods are critical valve train components that directly transfer motion from your camshaft to your rocker arms—any wear or deflection compromises engine efficiency and reliability. This complete...11320570- SKU:
- 11320570
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- TYPE:
- CLUTCH
- UNITS:
- KIT
- PRODUCT NAME:
- PUSHROD KIT
- RIDING STYLE:
- STREET
$70.95 -
EASTERN MOTORCYCLE PARTS Pressure Plate - 37901-84A A-37901-84A
EASTERN MOTORCYCLE PARTS
$145.95A worn or damaged pressure plate compromises your clutch engagement and throttle response, leading to slippage and inconsistent power delivery. The EASTERN MOTORCYCLE PARTS Pressure Plate...11320571- SKU:
- 11320571
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- PRESSURE PLATE
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH
- UNITS:
- EACH
$145.95Qty in Cart: 0Quantity:Price:$145.95Subtotal: -
EASTERN MOTORCYCLE PARTS Release Plate - 37871-41 A-37871-41
EASTERN MOTORCYCLE PARTS
$57.95A worn or damaged release plate compromises your clutch engagement and shifts, creating inconsistent power delivery when you need precision most. This OEM-equivalent replacement restores factory...11320572- SKU:
- 11320572
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- PRODUCT NAME:
- RELEASE DISC
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$57.95 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.030" A-35852-84
EASTERN MOTORCYCLE PARTS
$6.70Improper sprocket alignment introduces premature wear, vibration, and potential catastrophic drivetrain failure. These precision spacers deliver the exact 0.030" offset required for proper front...DS196153- SKU:
- DS196153
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$6.70 -
EASTERN MOTORCYCLE PARTS Countershaft Bushing - Clutch Side A-36048-36
EASTERN MOTORCYCLE PARTS
$28.95A worn countershaft bushing compromises clutch engagement precision and accelerates drivetrain wear—replacing it restores smooth power transfer and extends transmission life. This OEM-spec Eastern...DS196171- SKU:
- DS196171
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH SIDE
- UNITS:
- EACH
$28.95 -
EASTERN MOTORCYCLE PARTS Countershaft Bushing - Clutch Side A-36048-76A
EASTERN MOTORCYCLE PARTS
$28.95A worn countershaft bushing compromises clutch engagement precision and accelerates drivetrain wear—replacing it restores smooth shifts and extends the life of your transmission. This Eastern...DS196172- SKU:
- DS196172
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH SIDE
- UNITS:
- EACH
- PRODUCT NAME:
- BUSHING
$28.95 -
EASTERN MOTORCYCLE PARTS Countershaft Bushing - Starter Side A-36046-36
EASTERN MOTORCYCLE PARTS
$28.95The countershaft bushing is a critical wear component that directly impacts shift quality and drivetrain longevity. Over time, bushing degradation causes excessive play in your countershaft, leading...DS196173- SKU:
- DS196173
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- STARTER SIDE
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$28.95 -
EASTERN MOTORCYCLE PARTS Countershaft Bushing - Starter Side A-36045-76
EASTERN MOTORCYCLE PARTS
$28.95A worn countershaft bushing compromises shift quality and accelerates drivetrain wear—this OEM Eastern component restores precise tolerances and smooth engagement. Whether you're rebuilding a 4-speed...DS196174- SKU:
- DS196174
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- TYPE:
- STARTER SIDE
$28.95 -
EASTERN MOTORCYCLE PARTS Main Drive Gear - Spacer A-35070-77
EASTERN MOTORCYCLE PARTS
$41.95Proper gear spacing is critical to transmission reliability and performance—misalignment or wear in your main drive gear assembly compromises shift quality and accelerates component degradation. The...DS196234- SKU:
- DS196234
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- EACH
- TYPE:
- MAIN DRIVE GEAR
- PRODUCT NAME:
- SPACER
- RIDING STYLE:
- STREET
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
EASTERN MOTORCYCLE PARTS Main Drive Gear - Spacer A-35070-80
EASTERN MOTORCYCLE PARTS
$41.95Proper gear spacing is critical to maintaining optimal drivetrain geometry and preventing premature wear on your motorcycle's primary drive system. The Eastern Motorcycle Parts Main Drive Gear Spacer...DS196235- SKU:
- DS196235
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- MAIN DRIVE GEAR
- PRODUCT NAME:
- SPACER
- UNITS:
- EACH
$41.95 -
EASTERN MOTORCYCLE PARTS Main Drive Gear - Spacer A-35070-84
EASTERN MOTORCYCLE PARTS
$37.95Proper gear spacing is critical to transmission longevity and consistent power delivery in high-performance applications. The EASTERN MOTORCYCLE PARTS Main Drive Gear Spacer A-35070-84 ensures...DS196237- SKU:
- DS196237
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SPACER
- RIDING STYLE:
- STREET
- TYPE:
- MAIN DRIVE GEAR
- UNITS:
- EACH
$37.95 -
EASTERN MOTORCYCLE PARTS Main Drive Gear - Spacer A-35171-37
EASTERN MOTORCYCLE PARTS
$39.95The EASTERN MOTORCYCLE PARTS Main Drive Gear Spacer A-35171-37 is a precision-engineered component designed to maintain proper gear mesh alignment and spacing in your primary drive system. Correct...DS196238- SKU:
- DS196238
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SPACER
- RIDING STYLE:
- STREET
- TYPE:
- MAIN DRIVE GEAR
- UNITS:
- EACH
$39.95 -
EASTERN MOTORCYCLE PARTS Thrust Washer A-6003
EASTERN MOTORCYCLE PARTS
$8.10Thrust washers are critical wear components that prevent axial movement and protect bearing surfaces in high-stress applications. Over time, stock washers degrade from friction and impact, leading to...DS194280- SKU:
- DS194280
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- TRANSMISSION TYPE:
- 5 SPEED
- TYPE:
- COUNTERSHAFT
- PRODUCT NAME:
- THRUST WASHER
- TYPE:
- MAINSHAFT
$8.10 -
EASTERN MOTORCYCLE PARTS Bearing Housing A-35100-36
EASTERN MOTORCYCLE PARTS
$57.95A quality bearing housing is critical to maintaining precise wheel alignment and reducing rotational resistance in high-performance applications. The Eastern Motorcycle Parts A-35100-36 delivers the...DS194282- SKU:
- DS194282
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- MAINSHAFT
- PRODUCT NAME:
- HOUSING
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- BEARING
$57.95Qty in Cart: 0Quantity:Price:$57.95Subtotal:
