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
-
On Sale
EASTERN MOTORCYCLE PARTS Mainshaft Bearing Race A-35125-78
EASTERN MOTORCYCLE PARTS
MSRP: $87.95Now: $80.03Was: $87.95The mainshaft bearing race is a critical load-bearing component that directly impacts transmission smoothness and longevity. A worn or damaged race creates play in the mainshaft, leading to gear...DS196139- SKU:
- DS196139
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- STYLE:
- OVERSIZE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
- PRODUCT NAME:
- BEARING RACE
MSRP: $87.95Now: $80.03Was: $87.95Qty in Cart: 0Quantity:Price:MSRP: $87.95Now: $80.03Was: $87.95Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.210" A-24037-70
EASTERN MOTORCYCLE PARTS
Now: $15.93Was: $17.50Proper sprocket and pulley alignment is critical to powertrain longevity—misalignment accelerates wear, increases friction, and can compromise drive system performance. The EASTERN MOTORCYCLE PARTS...DS196143- SKU:
- DS196143
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
Now: $15.93Was: $17.50 -
On Sale
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.010" A-35850-84
EASTERN MOTORCYCLE PARTS
Now: $6.10Was: $6.70Improper sprocket and belt drive alignment can introduce premature wear, increase vibration, and compromise power transfer efficiency. This spacer delivers precise 0.010" spacing to ensure your front...DS196151- SKU:
- DS196151
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
Now: $6.10Was: $6.70Qty in Cart: 0Quantity:Price:Now: $6.10Was: $6.70Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.020" A-35851-84
EASTERN MOTORCYCLE PARTS
Now: $6.10Was: $6.70Improper sprocket and pulley alignment is one of the most common causes of premature wear, vibration, and power loss in high-performance engines. This spacer kit ensures your front motor sprocket or...DS196152- SKU:
- DS196152
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
Now: $6.10Was: $6.70 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Hub Key A-37523-85
EASTERN MOTORCYCLE PARTS
Now: $20.84Was: $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...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
Now: $20.84Was: $22.90 -
On Sale
EASTERN MOTORCYCLE PARTS Motor Sprocket Shaft Spacers 40-0149
EASTERN MOTORCYCLE PARTS
MSRP: $39.95Now: $36.35Was: $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...11060074- SKU:
- 11060074
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- SPACER
- RIDING STYLE:
- STREET
- TYPE:
- SPROCKET SHAFT
- UNITS:
- EACH
MSRP: $39.95Now: $36.35Was: $39.95 -
On Sale
EASTERN MOTORCYCLE PARTS Mainshafter - Spacer A-33344-94
EASTERN MOTORCYCLE PARTS
MSRP: $52.95Now: $48.18Was: $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...DS194281- SKU:
- DS194281
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPACER
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
- STYLE:
- SPROCKET
MSRP: $52.95Now: $48.18Was: $52.95 -
On Sale
EASTERN MOTORCYCLE PARTS Bearing Inner Race A-34091-85
EASTERN MOTORCYCLE PARTS
MSRP: $53.95Now: $49.09Was: $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...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
MSRP: $53.95Now: $49.09Was: $53.95 -
On Sale
EASTERN MOTORCYCLE PARTS Clutch Hub Keys A-37523-15
EASTERN MOTORCYCLE PARTS
Now: $22.02Was: $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...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
Now: $22.02Was: $24.20 -
On Sale
EASTERN MOTORCYCLE PARTS Bearing - 8992A A-8992A
EASTERN MOTORCYCLE PARTS
MSRP: $26.95Now: $24.52Was: $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...11060070- SKU:
- 11060070
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- STYLE:
- OEM REPLACEMENT
MSRP: $26.95Now: $24.52Was: $26.95 -
On Sale
EASTERN MOTORCYCLE PARTS Mainshaft - Ball Bearing A-8996
EASTERN MOTORCYCLE PARTS
MSRP: $43.95Now: $39.99Was: $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...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
MSRP: $43.95Now: $39.99Was: $43.95 -
On Sale
EASTERN MOTORCYCLE PARTS Release Finger - 37084-79 A-37084-79
EASTERN MOTORCYCLE PARTS
MSRP: $31.95Now: $29.07Was: $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...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
MSRP: $31.95Now: $29.07Was: $31.95 -
On Sale
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.060" A-24032-70
EASTERN MOTORCYCLE PARTS
Now: $12.29Was: $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...DS196136- SKU:
- DS196136
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
Now: $12.29Was: $13.50 -
On Sale
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.090" A-24033-70
EASTERN MOTORCYCLE PARTS
Now: $12.29Was: $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...DS196137- SKU:
- DS196137
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
Now: $12.29Was: $13.50 -
On Sale
Jims Transmission Sprocket Spacer for Harley-Davidson Road King 1994-2006 33344-94
JIMS
MSRP: $53.25Now: $47.93Was: $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...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
MSRP: $53.25Now: $47.93Was: $53.25 -
On Sale
Jims 5th Gear Mainshaft with Bearings and Seal for Harley-Davidson FLHR Road King 1994-1995 8296
JIMS
MSRP: $461.90Now: $415.71Was: $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,...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
MSRP: $461.90Now: $415.71Was: $461.90 -
On Sale
Jims Transmission Sprocket Spacer for Harley-Davidson Softail 1986-1994 33334-85
JIMS
MSRP: $53.25Now: $47.93Was: $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...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
MSRP: $53.25Now: $47.93Was: $53.25 -
On Sale
Jims Transmission Door Bearings for Harley-Davidson 1993-1998 Dyna Low Rider FXDL 8998K
JIMS
MSRP: $39.05Now: $35.15Was: $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...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
MSRP: $39.05Now: $35.15Was: $39.05 -
On Sale
Jims Transmission Main Bearing Race for Harley-Davidson FLH 1965-1977 35125-37
JIMS
MSRP: $112.50Now: $101.25Was: $112.50A 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...DS195016- SKU:
- DS195016
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- BEARING RACE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- MAIN BEARING
MSRP: $112.50Now: $101.25Was: $112.50 -
On Sale
EASTERN MOTORCYCLE PARTS Shifter Shaft - 34628-75 A-34628-75
EASTERN MOTORCYCLE PARTS
MSRP: $37.95Now: $34.53Was: $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...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
MSRP: $37.95Now: $34.53Was: $37.95
