Harley Transmission Internal Components
Harley Bike Transmission Internal Components at JJ Motorsports
Rebuild your Harley's transmission with premium internal components from JJ Motorsports, featuring high-strength countershafts, sealed bearings, and detent springs for smoother shifting and long-lasting durability on Big Twin, Evo, and Twin Cam models. These precision parts ensure reliable gear engagement and reduced noise.
Shop Andrews, JIMS, and Eastern Motorcycle Parts transmission internals for OEM-quality performance. Explore related categories such as Harley drivetrain for clutches and chains, or Harley for exhaust and cams to complete your rebuild.
Top Harley Transmission Internal Components
- Andrews Countershaft 296700 – High-strength countershaft for 5-speed transmissions; heat-treated for smooth shifting on Evo Big Twins.
- JIMS Bearing 8998K – Sealed mainshaft bearing; precision fit for reduced vibration in Twin Cam models.
- Eastern Motorcycle Parts Detent Spring A-34483-02 – OEM-spec detent spring for shift forks; restores crisp gear selection on Sportster and Dyna.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
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 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 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 Release Finger - 37084-79 A-37084-79
EASTERN MOTORCYCLE PARTS
$31.95A worn or damaged release finger compromises your clutch engagement and leaves you stranded. The Eastern Motorcycle Parts Release Finger is a precision OEM replacement that restores smooth, reliable clutch disengagement—essential for consistent shifting...11060183- SKU:
- 11060183
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- STEEL
- STYLE:
- OEM REPLACEMENT
- TRANSMISSION TYPE:
- 5 SPEED
- TYPE:
- CLUTCH RELEASE FINGER
- PRODUCT NAME:
- RELEASE FINGER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$31.95 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.060" A-24032-70
EASTERN MOTORCYCLE PARTS
$13.50Improper sprocket and belt drive alignment is one of the fastest ways to accelerate wear on your drivetrain components. This spacer kit gives you the precision alignment tools needed to position your front motor sprocket or belt drive pulley with exact...DS196136- SKU:
- DS196136
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
$13.50 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.090" A-24033-70
EASTERN MOTORCYCLE PARTS
$13.50Improper sprocket and pulley alignment leads to accelerated wear, noise, and potential drivetrain failure. These Eastern Motorcycle Parts spacers deliver the precise 0.090" offset required to achieve factory-spec alignment on your front motor sprocket or...DS196137- SKU:
- DS196137
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$13.50 -
Jims Transmission Sprocket Spacer for Harley-Davidson Road King 1994-2006 33344-94
JIMS
$53.25Transmission sprocket spacers are critical to maintaining proper component alignment and seal integrity in your Road King's drivetrain. A worn or improperly fitted spacer accelerates seal degradation and can lead to fluid leakage and premature...DS197062- SKU:
- DS197062
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- LENGTH:
- 0.600'
- PRODUCT NAME:
- TRANSMISSION SPROCKET SPACER
- TRANSMISSION TYPE:
- 5 SPEED
- TRANSMISSION TYPE:
- 6 SPEED
- UNITS:
- EACH
$53.25 -
Jims 5th Gear Mainshaft with Bearings and Seal for Harley-Davidson FLHR Road King 1994-1995 8296
JIMS
$461.90A worn or failing mainshaft compromises shifting reliability and can accelerate wear throughout your transmission. The JIMS 5th Gear Mainshaft restores precise engagement and smooth power delivery, critical for both street cruising and sustained...11060036- SKU:
- 11060036
- Availability:
- Ships Same Business Day
- Weight:
- 2.39 LBS
- FEATURES:
- INCLUDES BEARINGS
- PRODUCT NAME:
- GEAR
- TRANSMISSION TYPE:
- 5 SPEED
- UNITS:
- EACH
- TYPE:
- MAIN DRIVE GEAR
- FEATURES:
- INCLUDES SEAL
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
$461.90 -
Jims Transmission Sprocket Spacer for Harley-Davidson Softail 1986-1994 33334-85
JIMS
$53.25A worn or improperly fitted transmission sprocket spacer accelerates seal degradation and can introduce play into your drivetrain—leading to premature failures and costly rebuilds. The JIMS Transmission Sprocket Spacer 33334-85 maintains precise...DS197053- SKU:
- DS197053
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- LENGTH:
- 0.850'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- TRANSMISSION SPROCKET SPACER
- TRANSMISSION TYPE:
- 5 SPEED
$53.25Qty in Cart: 0Quantity:Price:$53.25Subtotal: -
Jims Transmission Door Bearings for Harley-Davidson 1993-1998 Dyna Low Rider FXDL 8998K
JIMS
$39.05Transmission door bearings are critical wear items on your Dyna Low Rider—neglecting them leads to increased friction, noise, and eventual drivetrain damage. The JIMS 8998K is a U.S.-manufactured replacement that restores smooth operation and extends the...DS197063- SKU:
- DS197063
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- TRANSMISSION TYPE:
- 5 SPEED
- UNITS:
- 2 PACK
- PRODUCT NAME:
- BEARING
- TYPE:
- TRAP DOOR
$39.05 -
Jims Transmission Main Bearing Race for Harley-Davidson FLH 1965-1977 35125-37
JIMS
$119.25A worn or damaged mainshaft bearing race compromises transmission smoothness and accelerates wear on adjacent components, leading to costly rebuilds. The JIMS 35125-37 delivers OEM-grade precision fit and durability, restoring the tight tolerances your...DS195016- SKU:
- DS195016
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- BEARING RACE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- MAIN BEARING
$119.25 -
EASTERN MOTORCYCLE PARTS Shifter Shaft - 34628-75 A-34628-75
EASTERN MOTORCYCLE PARTS
$37.95A worn or damaged shifter shaft compromises your bike's reliability and shifts, turning every gear change into a gamble. This Eastern Motorcycle Parts replacement restores precise engagement and smooth operation, getting you back to confident riding...11060087- SKU:
- 11060087
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- SHIFT LEVER SHAFT
- RIDING STYLE:
- STREET
- STYLE:
- OEM REPLACEMENT
$37.95 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Nut - 35047-71A A-35047-71A
EASTERN MOTORCYCLE PARTS
$14.95A worn or damaged sprocket shaft nut compromises your entire drivetrain's integrity, leading to slippage, noise, and potential catastrophic failure. This OEM-quality replacement from Eastern Motorcycle Parts ensures secure fastening and reliable power...11060089- SKU:
- 11060089
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- MAINSHAFT SPROCKET NUT
$14.95 -
EASTERN MOTORCYCLE PARTS Clutch Hub Nuts A-37495-91
EASTERN MOTORCYCLE PARTS
$16.95A secure clutch hub nut is foundational to reliable drivetrain performance—improper fastening leads to slippage, noise, and catastrophic transmission failure. This Eastern Motorcycle Parts fastener delivers the precision fit and holding strength your...11060091- SKU:
- 11060091
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- NUT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
- TYPE:
- CLUTCH HUB
$16.95 -
EASTERN MOTORCYCLE PARTS Bearing - 8970 A-8970
EASTERN MOTORCYCLE PARTS
$35.95Worn or failing bearings compromise handling precision and create dangerous play in critical chassis components. The Eastern Motorcycle Parts A-8970 bearing restores original equipment performance and reliability, ensuring smooth operation under...11060092- SKU:
- 11060092
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- STYLE:
- OEM REPLACEMENT
- TYPE:
- COUNTERSHAFT
- UNITS:
- EACH
$35.95 -
EASTERN MOTORCYCLE PARTS Transmission Mainshaft Bearing 44-0520
EASTERN MOTORCYCLE PARTS
$110.95A worn or failing transmission mainshaft bearing directly compromises shift quality, generates noise, and can lead to catastrophic transmission failure if left unchecked. The EASTERN MOTORCYCLE PARTS 44-0520 is a precision-engineered replacement that...11060232- SKU:
- 11060232
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
$110.95 -
EASTERN MOTORCYCLE PARTS Shifter Fork Shims - 0.007" A-6750
EASTERN MOTORCYCLE PARTS
$6.70Precise shifter fork clearance is critical to maintaining smooth, reliable gear engagement under racing conditions. These OEM-spec shims compensate for wear and manufacturing tolerances in your transmission, eliminating sloppy shifts and potential fork...11060021- SKU:
- 11060021
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- TYPE:
- SHIFTER FORK
- PRODUCT NAME:
- SHIM
- TRANSMISSION TYPE:
- 4 SPEED
- UNITS:
- 10 PACK
$6.70
