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
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On Sale
EASTERN MOTORCYCLE PARTS Main Drive Gear - Spacer A-35070-77
EASTERN MOTORCYCLE PARTS
MSRP: $41.95Now: $38.17Was: $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
MSRP: $41.95Now: $38.17Was: $41.95 -
On Sale
EASTERN MOTORCYCLE PARTS Main Drive Gear - Spacer A-35070-80
EASTERN MOTORCYCLE PARTS
MSRP: $41.95Now: $38.17Was: $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
MSRP: $41.95Now: $38.17Was: $41.95 -
On Sale
EASTERN MOTORCYCLE PARTS Main Drive Gear - Spacer A-35070-84
EASTERN MOTORCYCLE PARTS
MSRP: $37.95Now: $34.53Was: $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
MSRP: $37.95Now: $34.53Was: $37.95 -
On Sale
EASTERN MOTORCYCLE PARTS Main Drive Gear - Spacer A-35171-37
EASTERN MOTORCYCLE PARTS
MSRP: $39.95Now: $36.35Was: $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
MSRP: $39.95Now: $36.35Was: $39.95 -
On Sale
EASTERN MOTORCYCLE PARTS Thrust Washer A-6003
EASTERN MOTORCYCLE PARTS
Now: $7.37Was: $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
Now: $7.37Was: $8.10 -
On Sale
EASTERN MOTORCYCLE PARTS Bearing Housing A-35100-36
EASTERN MOTORCYCLE PARTS
MSRP: $57.95Now: $52.73Was: $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
MSRP: $57.95Now: $52.73Was: $57.95 -
On Sale
EASTERN MOTORCYCLE PARTS Main Bearing Race A-35105-52
EASTERN MOTORCYCLE PARTS
MSRP: $66.95Now: $60.92Was: $66.95Main bearing races are critical components that directly impact engine reliability and longevity—premature failure here can mean catastrophic engine damage. The Eastern Motorcycle Parts A-35105-52 is...DS195018- SKU:
- DS195018
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- BEARING RACE
- TYPE:
- MAIN
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $66.95Now: $60.92Was: $66.95 -
On Sale
EASTERN MOTORCYCLE PARTS Countershaft Bushing - 1st and 2nd Gear A-35791-36
EASTERN MOTORCYCLE PARTS
MSRP: $33.95Now: $30.89Was: $33.95A worn or damaged countershaft bushing compromises gear engagement and accelerates drivetrain wear—potentially leaving you stranded mid-race or ride. The EASTERN MOTORCYCLE PARTS Countershaft Bushing...DS194132- SKU:
- DS194132
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- TYPE:
- FIRST GEAR
- UNITS:
- EACH
- MATERIAL:
- BRONZE
- PRODUCT NAME:
- COUNTERSHAFT BUSHING
- TYPE:
- SECOND GEAR
MSRP: $33.95Now: $30.89Was: $33.95 -
On Sale
EASTERN MOTORCYCLE PARTS Countershaft Bushing - 1st and Reverse Gear A-35789-36
EASTERN MOTORCYCLE PARTS
MSRP: $33.95Now: $30.89Was: $33.95Precise gear engagement depends on worn components being replaced before they compromise your entire transmission system. This countershaft bushing maintains critical clearances between 1st and...DS194135- SKU:
- DS194135
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- BRONZE
- TYPE:
- REVERSE
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- TYPE:
- FIRST GEAR
- UNITS:
- EACH
MSRP: $33.95Now: $30.89Was: $33.95 -
On Sale
EASTERN MOTORCYCLE PARTS Shifter Fork Shaft A-34140-36
EASTERN MOTORCYCLE PARTS
MSRP: $35.95Now: $32.71Was: $35.95A worn or bent shifter fork shaft directly impacts shift precision and speed—critical factors whether you're racing or enjoying spirited riding. This EASTERN MOTORCYCLE PARTS unit restores crisp,...DS194214- SKU:
- DS194214
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- SHIFT FORK SHAFT
- TRANSMISSION TYPE:
- 4 SPEED
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $35.95Now: $32.71Was: $35.95 -
DRAG SPECIALTIES Mainshaft Sprocket Nut 33-0303-SC1
DRAG SPECIALTIES
$20.09A worn or damaged mainshaft sprocket nut compromises the critical connection between your sprocket and drive gear—risking slippage, misalignment, and catastrophic drivetrain failure. This...DS194079- SKU:
- DS194079
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- NUT
- TYPE:
- MAINSHAFT SPROCKET
- UNITS:
- EACH
$20.09 -
DRAG SPECIALTIES Transmission Bearing 6305-2RS
DRAG SPECIALTIES
$15.11Transmission bearings are critical load-bearing components that directly impact your vehicle's power delivery, shift quality, and overall drivetrain reliability. A worn or failing bearing introduces...11060011- SKU:
- 11060011
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- BALL BEARING
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
$15.11 -
DRAG SPECIALTIES Transmission Bearing 6207-2RS
DRAG SPECIALTIES
$35.59Transmission bearing failure can bring your build to a halt mid-season—or worse, mid-race. The DRAG SPECIALTIES 6207-2RS is engineered to withstand the shock loads and sustained RPM of...11060010- SKU:
- 11060010
- Availability:
- Ships Same Business Day
- Weight:
- 1.07 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- MAINSHAFT
- PRODUCT NAME:
- BALL BEARING
$35.59 -
On Sale
S&S CYCLE Transmission Countershaft Bearing 56-3031
S&S CYCLE
MSRP: $50.95Now: $45.86Was: $50.95Transmission countershaft bearings endure extreme rotational forces and wear faster than most internal drivetrain components—a failed bearing can leave you stranded or cause catastrophic internal...11060207- SKU:
- 11060207
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- TYPE:
- COUNTERSHAFT
- TYPE:
- TRANSMISSION
MSRP: $50.95Now: $45.86Was: $50.95 -
On Sale
ANDREWS Mainshaft - 4th Gear 299104
ANDREWS
MSRP: $129.95Now: $116.96Was: $129.95A worn or damaged 4th gear mainshaft can compromise your transmission's reliability and shift consistency, especially under sustained high-load conditions. The ANDREWS 299104 is engineered for...11060063- SKU:
- 11060063
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- PRODUCT NAME:
- GEAR
- TOOTH COUNT:
- 30
- STYLE:
- STANDARD RATIO
- TYPE:
- FOURTH GEAR
- MATERIAL:
- HIGH-NICKEL ALLOY STEEL
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $129.95Now: $116.96Was: $129.95Qty in Cart: 0Quantity:Price:MSRP: $129.95Now: $116.96Was: $129.95Subtotal: -
On Sale
COLONY Transmission Stud - 1/2-13 x 3/8-24 9655-4
COLONY
MSRP: $24.95Now: $22.46Was: $24.95Transmission studs are critical fastening points that endure extreme clamping loads and thermal cycling. The COLONY 1/2-13 x 3/8-24 transmission stud delivers the strength and reliability you need to...DS189935- SKU:
- DS189935
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- DIAMETER - THREAD SIZE:
- 1/2-13
- PRODUCT NAME:
- TRANSMISSION BOTTOM STUD
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
- DIAMETER - THREAD SIZE:
- 3/8-24
- STYLE:
- OVERSIZE
- STYLE:
- REPLACEMENT
- TYPE:
- TRANSMISSION
MSRP: $24.95Now: $22.46Was: $24.95 -
On Sale
ANDREWS 4-Speed Mainshaft 258190
ANDREWS
MSRP: $263.95Now: $237.56Was: $263.95If you're rebuilding a 4-speed transmission, the mainshaft is the critical component that directly impacts power delivery and shift quality. The Andrews 258190 mainshaft is engineered for reliable...DS199449- SKU:
- DS199449
- Availability:
- Ships Same Business Day
- Weight:
- 1.69 LBS
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- MAINSHAFT
- UNITS:
- EACH
MSRP: $263.95Now: $237.56Was: $263.95Qty in Cart: 0Quantity:Price:MSRP: $263.95Now: $237.56Was: $263.95Subtotal: -
On Sale
ANDREWS Stock Ratio Clutch Gear 254730
ANDREWS
MSRP: $299.95Now: $269.96Was: $299.95The ANDREWS Stock Ratio Clutch Gear delivers reliable engagement and smooth power delivery for stock and lightly modified engines. This precision-engineered component maintains OEM specifications...DS199438- SKU:
- DS199438
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- GEAR CLUTCH
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- STYLE:
- STANDARD RATIO
- TYPE:
- STOCK RATIO
MSRP: $299.95Now: $269.96Was: $299.95Qty in Cart: 0Quantity:Price:MSRP: $299.95Now: $269.96Was: $299.95Subtotal: -
On Sale
ANDREWS Countershaft - Main Drive Gear 255580
ANDREWS
MSRP: $130.95Now: $117.86Was: $130.95The ANDREWS Countershaft - Main Drive Gear 255580 is essential for maintaining reliable power transfer in high-rpm applications. A worn or damaged countershaft gear directly compromises acceleration...DS199439- SKU:
- DS199439
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- PRODUCT NAME:
- COUNTERSHAFT
- RIDING STYLE:
- STREET
- STYLE:
- STANDARD RATIO
- TOOTH COUNT:
- 27
- TYPE:
- MAIN DRIVE GEAR
- UNITS:
- EACH
MSRP: $130.95Now: $117.86Was: $130.95 -
On Sale
ANDREWS 5-Speed Gear Set - 2.94:1 First Ratio 296081
ANDREWS
MSRP: $1,414.95Now: $1,273.46Was: $1,414.95A 5-speed transmission demands gear components that can handle sustained high-RPM shifts without compromise. The ANDREWS 296081 gear set delivers the durability and precision required for competitive...11060058- SKU:
- 11060058
- Availability:
- Ships Same Business Day
- Weight:
- 14.45 LBS
- FIRST GEAR RATIO:
- 2.94:1
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- GEAR SET
- RIDING STYLE:
- STREET
- STYLE:
- CLOSE RATIO
- UNITS:
- SET
MSRP: $1,414.95Now: $1,273.46Was: $1,414.95Qty in Cart: 0Quantity:Price:MSRP: $1,414.95Now: $1,273.46Was: $1,414.95Subtotal:
