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!
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- Qty in Cart
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- Price
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BAKER DRIVETRAIN 5-Speed Countershaft Bearing - Closed End BK2526
BAKER DRIVETRAIN
$10.99A worn or failing countershaft bearing compromises your 5-speed transmission's structural integrity and accelerates wear across your entire drivetrain. The Baker Drivetrain BK2526 is a precision-engineered replacement that restores proper load...11060238- SKU:
- 11060238
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
$10.99 -
BAKER DRIVETRAIN 5-Speed Mainshaft/Countershaft Split Cage Needle Bearing 8876A
BAKER DRIVETRAIN
$8.99Worn needle bearings in your 5-speed Big Twin transmission can cause shift hesitation, increased drivetrain noise, and premature gear damage—all signs it's time for a replacement. The Baker Drivetrain 8876A is a direct OEM-equivalent bearing engineered...11060239- SKU:
- 11060239
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
$8.99 -
BAKER DRIVETRAIN 5-Speed Main Drive Gear Needle Bearing - Open End HK2520
BAKER DRIVETRAIN
$8.99The Baker Drivetrain HK2520 needle bearing is a critical wear component in your 5-speed Big Twin transmission—one that directly impacts shift quality, load distribution, and overall drivetrain longevity. When this bearing degrades, you'll experience...11060240- SKU:
- 11060240
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
$8.99 -
BAKER DRIVETRAIN 5-Speed Main Drive Gear Roller Ball Bearing 6209
BAKER DRIVETRAIN
$21.99If your 5-Speed Big Twin's drivetrain is showing signs of wear—rough engagement, excessive noise, or notchy shifts—a worn main drive gear bearing is often the culprit. Baker's 6209 roller ball bearing restores smooth power delivery and precise gear...11060241- SKU:
- 11060241
- Availability:
- Ships Same Business Day
- Weight:
- 1.08 LBS
$21.99 -
BAKER DRIVETRAIN 5-Speed Main Drive Gear Seal 12067B
BAKER DRIVETRAIN
$8.99A compromised main drive gear seal is one of the fastest ways to lose fluid pressure and contaminate your transmission oil in a 5-speed Big Twin. This OEM-specification Baker Drivetrain replacement seal restores the critical barrier between your primary...11060242- SKU:
- 11060242
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$8.99 -
BAKER DRIVETRAIN 5-Speed Transmission Door Bearing 6304
BAKER DRIVETRAIN
$14.99Transmission bearing wear is one of the most common culprits behind rough shifts, noise, and premature drivetrain failure in 5-speed Big Twin engines. The BAKER DRIVETRAIN 6304 is a direct replacement bearing engineered to restore smooth operation and...11060243- SKU:
- 11060243
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
$14.99 -
BAKER DRIVETRAIN Cruise Drive Main Drive Gear Tapered Roller Bearing Kit 640-67
BAKER DRIVETRAIN
$995.00Stock Harley-Davidson main drive gear bearings are a known weak point—premature failure can leave you stranded and facing expensive engine teardowns. The Baker Drivetrain 640-67 kit addresses this vulnerability head-on with a complete bearing assembly...11100100- SKU:
- 11100100
- Availability:
- Ships Same Business Day
- Weight:
- 6.27 LBS
$995.00 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 1.360" - M8 Touring DH-29900041
DARKHORSE MOTOR COMPANY
$36.95Precision in your drivetrain starts with proper spacing. This DARKHORSE MOTOR COMPANY sprocket shaft spacer maintains exact OEM tolerances, ensuring optimal chain alignment and reducing premature wear on your sprockets and countershaft. Whether you're...11060246- SKU:
- 11060246
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
$36.95 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 1.04" - M8 Touring DH-24008-97
DARKHORSE MOTOR COMPANY
$39.95Precision sprocket alignment is critical to drivetrain longevity and performance consistency, especially in high-load touring applications. This DARKHORSE MOTOR COMPANY spacer maintains exact OEM tolerances, preventing shaft runout and premature wear on...11060247- SKU:
- 11060247
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
$39.95 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 1.098" - Touring DH-24008-99
DARKHORSE MOTOR COMPANY
$36.95Proper sprocket shaft alignment is critical to drivetrain longevity and performance—even small tolerances can cause premature wear, noise, and power loss. This OEM-specification spacer ensures your sprocket sits at the exact width your touring bike...11060248- SKU:
- 11060248
- Availability:
- Ships Same Business Day
- Weight:
- 0.39 LBS
$36.95 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 1.540" - Touring DH-24008-03
DARKHORSE MOTOR COMPANY
$36.95Proper sprocket shaft alignment is critical for consistent power delivery and drivetrain longevity, and this spacer ensures your touring bike maintains factory-spec dimensions. DARKHORSE MOTOR COMPANY manufactures this spacer to OEM standards,...11060249- SKU:
- 11060249
- Availability:
- Ships Same Business Day
- Weight:
- 0.54 LBS
$36.95 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 1.560" - Big Twin DH-24009-06
DARKHORSE MOTOR COMPANY
$36.95A properly spaced sprocket shaft is critical to maintaining chain alignment and preventing premature wear on your drivetrain. This OEM-spec spacer ensures your Big Twin runs with factory precision, eliminating the guesswork that often comes with...11060250- SKU:
- 11060250
- Availability:
- Ships Same Business Day
- Weight:
- 0.54 LBS
$36.95 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 0.894" - Softail/Dyna DH-24038-99
DARKHORSE MOTOR COMPANY
$36.95Proper sprocket shaft alignment is critical for smooth power delivery and chain longevity on your Softail or Dyna. This OEM-spec spacer ensures precise positioning, eliminating binding and premature wear that can compromise drivetrain performance...11060251- SKU:
- 11060251
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
$36.95 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 0.987" - Softail DH-24039--01A
DARKHORSE MOTOR COMPANY
$36.95Proper sprocket shaft alignment is critical for smooth power delivery and extended drivetrain life on your Softail. This precision spacer maintains exact OEM specifications to prevent binding, vibration, and premature wear on your primary drive...11060252- SKU:
- 11060252
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$36.95 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 1.430" - Softail DH-24039-03
DARKHORSE MOTOR COMPANY
$36.95Proper sprocket shaft alignment is critical for chain longevity and smooth power delivery in Softail applications. This OEM-specification spacer ensures precise clearance tolerances, eliminating play that causes premature wear and drivetrain noise...11060253- SKU:
- 11060253
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$36.95 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 1.116" - Big Twin DH-11887
DARKHORSE MOTOR COMPANY
$36.95A properly spaced sprocket shaft is critical to maintaining correct chain alignment and preventing premature wear on your drivetrain. This precision spacer ensures your Big Twin engine delivers power to the wheel without binding or lateral movement...11060254- SKU:
- 11060254
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
$36.95 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 0.672" - M8 Touring DH-24002-70
DARKHORSE MOTOR COMPANY
$39.95Precision sprocket alignment is critical to drivetrain efficiency and component longevity. This DARKHORSE MOTOR COMPANY spacer maintains exact shaft positioning to eliminate lateral play and ensure consistent power delivery. Made from 4140 USA steel to...11060256- SKU:
- 11060256
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$39.95 -
DARKHORSE MOTOR COMPANY Sprocket Shaft Spacer - 1.331" - Dyna DH-24038-03
DARKHORSE MOTOR COMPANY
$36.95Proper sprocket shaft alignment is critical to chain drive longevity and power transmission efficiency. This OEM-spec spacer eliminates unwanted lateral movement that can lead to premature wear, noise, and catastrophic drivetrain failure. Install with...11060257- SKU:
- 11060257
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
$36.95 -
BAKER DRIVETRAIN Heavy Duty Throwout Bearing Kit TBK-56L
BAKER DRIVETRAIN
$98.95Stock throwout bearings are a common failure point under sustained high-performance driving, leading to costly clutch system rebuilds and track downtime. The BAKER Heavy Duty Throwout Bearing Kit TBK-56L addresses this vulnerability with...11060245- SKU:
- 11060245
- Availability:
- Ships Same Business Day
- Weight:
- 0.64 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- STREET
- TYPE:
- THROWOUT
$98.95 -
ANDREWS 1st Gear Set 299110
ANDREWS
$259.95A properly engineered first gear set is fundamental to consistent launch performance and reliable power transfer in high-RPM applications. The ANDREWS 1st Gear Set 299110 delivers the precision tolerances and material quality required for repeatability...11060064- SKU:
- 11060064
- Availability:
- Ships Same Business Day
- Weight:
- 2.03 LBS
- FIRST GEAR RATIO:
- 2.61:1
- MATERIAL:
- HIGH-NICKEL ALLOY STEEL
- PRODUCT NAME:
- GEAR SET
- RIDING STYLE:
- STREET
- STYLE:
- CLOSE RATIO
- TYPE:
- FIRST GEAR
- UNITS:
- SET
$259.95
