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
-
ANDREWS Countershaft - 3rd Gear 253030
ANDREWS
$133.95If you're experiencing gear slip, notchy shifts, or worn engagement on third gear, a worn countershaft is often the culprit—and it compromises your entire drivetrain's reliability. The ANDREWS Countershaft 3rd Gear 253030 is a direct OEM replacement...DS199432- SKU:
- DS199432
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 23
- TYPE:
- THIRD GEAR
- PRODUCT NAME:
- COUNTERSHAFT
- STYLE:
- STANDARD RATIO
- UNITS:
- EACH
$133.95 -
ANDREWS Mainshaft - 3rd Gear 253050
ANDREWS
$133.95A worn or damaged third gear on your mainshaft will compromise acceleration, shift response, and overall drivetrain reliability. The ANDREWS Mainshaft 3rd Gear 253050 is precision-engineered to restore OEM performance specifications and withstand the...DS199433- SKU:
- DS199433
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GEAR
- TYPE:
- THIRD GEAR
- UNITS:
- EACH
- STYLE:
- STANDARD RATIO
$133.95 -
ANDREWS Mainshaft - 1st Gear 251050
ANDREWS
$102.95The ANDREWS Mainshaft 1st Gear is engineered for serious transmission builds where reliability and precise gear ratios are non-negotiable. Whether you're rebuilding a high-revving engine or upgrading to a stronger first gear for launch performance, this...DS199434- SKU:
- DS199434
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- TYPE:
- FIRST GEAR
- PRODUCT NAME:
- GEAR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- STYLE:
- STANDARD RATIO
$102.95 -
ANDREWS Countershaft - 1st Gear 251060
ANDREWS
$143.95A worn or damaged countershaft first gear directly undermines acceleration, shift quality, and powertrain reliability. The ANDREWS 251060 delivers OEM-equivalent precision geometry and material strength, restoring factory performance characteristics and...DS199435- SKU:
- DS199435
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- TYPE:
- FIRST GEAR
- TOOTH COUNT:
- 17
- UNITS:
- EACH
- PRODUCT NAME:
- COUNTERSHAFT
- STYLE:
- STANDARD RATIO
$143.95Qty in Cart: 0Quantity:Price:$143.95Subtotal: -
ANDREWS Close-Ratio Gear Set 254850
ANDREWS
$422.95A close-ratio gear set transforms your acceleration by minimizing RPM gaps between gears, keeping your engine in the optimal power band longer. Whether you're on the track or pushing hard on the street, the ANDREWS 254850 delivers the gear spacing that...DS199436- SKU:
- DS199436
- Availability:
- Ships Same Business Day
- Weight:
- 2.26 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GEAR SET
- RIDING STYLE:
- STREET
- STYLE:
- CLOSE RATIO
- TYPE:
- CLOSE RATIO
$422.95 -
ANDREWS Stock Ratio Clutch Gear 254710
ANDREWS
$302.95The ANDREWS Stock Ratio Clutch Gear 254710 delivers reliable engagement and smooth power transfer for riders who demand consistent clutch performance without compromise. Built to OEM specifications, this gear maintains precise engagement characteristics...DS199440- SKU:
- DS199440
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- CLUTCH GEAR
- TYPE:
- STOCK RATIO
- STYLE:
- STANDARD RATIO
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$302.95 -
ANDREWS Countershaft Gear - 2nd/3rd Gear 296220
ANDREWS
$95.95The ANDREWS Countershaft Gear 2nd/3rd delivers the precision gear engagement your transmission demands under sustained load and high-RPM shifts. Whether you're running stock or modified power, upgrading to quality OEM-grade countershaft gears eliminates...DS199450- SKU:
- DS199450
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- GEAR
- TYPE:
- THIRD GEAR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 23
- STYLE:
- STANDARD RATIO
- TYPE:
- SECOND GEAR
$95.95 -
ANDREWS Countershaft Gear - 2nd/3rd Gear 296330
ANDREWS
$154.95Precision gear selection directly impacts your transmission's efficiency and power delivery across critical mid-range RPM bands. The ANDREWS Countershaft Gear 2nd/3rd upgrade reduces parasitic losses and improves shift consistency, delivering noticeable...DS199451- SKU:
- DS199451
- Availability:
- Ships Same Business Day
- Weight:
- 0.82 LBS
- PRODUCT NAME:
- GEAR
- TRANSMISSION TYPE:
- 5 SPEED
- TYPE:
- SECOND GEAR
- TYPE:
- THIRD GEAR
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 27
- UNITS:
- EACH
- STYLE:
- STANDARD RATIO
$154.95 -
ANDREWS Main Drive Gear with Chain Drive 296550
ANDREWS
$288.95The ANDREWS Main Drive Gear with Chain Drive is engineered for builders and racers who demand reliable, efficient power transfer in high-performance applications. This precision-machined component ensures consistent engagement and minimal drivetrain...DS199452- SKU:
- DS199452
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
- PRODUCT NAME:
- GEAR
- TYPE:
- MAIN DRIVE
- RIDING STYLE:
- STREET
- STYLE:
- CHAIN DRIVE
- STYLE:
- STANDARD RATIO
- TOOTH COUNT:
- 32
- MATERIAL:
- HIGH-NICKEL ALLOY STEEL
- UNITS:
- EACH
$288.95 -
ANDREWS Countershaft Gear - 5th Gear 296555
ANDREWS
$58.95If you're rebuilding a transmission or upgrading to higher RPM capability, a quality countershaft gear is non-negotiable for reliability and power delivery. The ANDREWS 5th Gear delivers precision manufacturing and durability you can count on, whether...DS199453- SKU:
- DS199453
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- TOOTH COUNT:
- 17
- TYPE:
- FIFTH GEAR
- RIDING STYLE:
- STREET
- STYLE:
- STANDARD RATIO
- PRODUCT NAME:
- GEAR
- UNITS:
- EACH
- TRANSMISSION TYPE:
- 5 SPEED
$58.95 -
ANDREWS Main Drive Gear with Belt Drive 296585
ANDREWS
$288.95A reliable main drive gear is fundamental to any high-performance engine's ability to deliver consistent power and longevity. The ANDREWS 296585 is engineered for engines that demand precision timing and durability under sustained load, making it an...DS199454- SKU:
- DS199454
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- MATERIAL:
- HIGH-NICKEL ALLOY STEEL
- STYLE:
- STANDARD RATIO
- TOOTH COUNT:
- 32
- TYPE:
- MAIN DRIVE
- PRODUCT NAME:
- GEAR
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- STYLE:
- BELT DRIVE
$288.95 -
ANDREWS 4-Speed Mainshaft 208800
ANDREWS
$302.05The ANDREWS 4-Speed Mainshaft 208800 is engineered for demanding applications where gear reliability and precise power transfer are non-negotiable. Whether you're rebuilding a transmission for consistent track duty or restoring a vintage powertrain, this...11060057- SKU:
- 11060057
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION
- UNITS:
- EACH
- PRODUCT NAME:
- MAINSHAFT
- RIDING STYLE:
- STREET
$302.05 -
ANDREWS 4-Speed Countershaft 207800
ANDREWS
$54.95The Andrews 4-Speed Countershaft 207800 is engineered for builders who demand reliable, repeatable performance in high-revving applications. This precision-manufactured countershaft provides the durability needed for consistent acceleration and power...DS199428- SKU:
- DS199428
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- COUNTERSHAFT
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION
$54.95 -
EASTERN MOTORCYCLE PARTS Mainshaft Bearing Nut A-35046-36
EASTERN MOTORCYCLE PARTS
$32.30A worn or damaged mainshaft bearing nut compromises your motorcycle's drivetrain integrity and can lead to costly internal damage or catastrophic failure. This Eastern Motorcycle Parts OEM-specification nut ensures proper bearing preload and secure...DS199419- SKU:
- DS199419
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- TYPE:
- BEARING
- PRODUCT NAME:
- NUT
$32.30 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.060" - 0.210" A-24032-SET
EASTERN MOTORCYCLE PARTS
$37.95Proper sprocket and pulley alignment is critical to drivetrain longevity and performance—misalignment accelerates wear on belts, chains, and bearings. The EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers give you precision control over front motor...DS196135- SKU:
- DS196135
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- SET
- PRODUCT NAME:
- SPACER
- TYPE:
- SPROCKET
- RIDING STYLE:
- STREET
$37.95 -
EASTERN MOTORCYCLE PARTS Mainshaft Bearing Race A-35125-78
EASTERN MOTORCYCLE PARTS
$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 noise, premature bearing wear, and eventual transmission...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
$87.95Qty in Cart: 0Quantity:Price:$87.95Subtotal: -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.210" A-24037-70
EASTERN MOTORCYCLE PARTS
$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 Sprocket Shaft Spacers deliver precision spacing in a...DS196143- SKU:
- DS196143
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$17.50 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.010" A-35850-84
EASTERN MOTORCYCLE PARTS
$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 motor sprocket or belt drive pulley sits in perfect...DS196151- SKU:
- DS196151
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
$6.70 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.020" A-35851-84
EASTERN MOTORCYCLE PARTS
$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 belt drive pulley sits in perfect alignment with the...DS196152- SKU:
- DS196152
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$6.70 -
EASTERN MOTORCYCLE PARTS Clutch Hub Key A-37523-85
EASTERN MOTORCYCLE PARTS
$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 Hub Key A-37523-85 delivers OEM-equivalent precision and...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
$22.90
