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 Bearing - 8042 40-0310
EASTERN MOTORCYCLE PARTS
MSRP: $33.95Now: $30.89Was: $33.95Transmission bearings are critical wear components that directly impact shift quality, noise levels, and overall drivetrain reliability. If you're experiencing rough shifts, grinding sounds, or play...11060076- SKU:
- 11060076
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- MAIN DRIVE GEAR
MSRP: $33.95Now: $30.89Was: $33.95 -
On Sale
EASTERN MOTORCYCLE PARTS Transmission Bearing - 8026 40-0315
EASTERN MOTORCYCLE PARTS
MSRP: $45.95Now: $41.81Was: $45.95Transmission bearing reliability directly impacts shift quality, drivetrain longevity, and overall power delivery—especially in high-performance or track-focused applications. The EASTERN MOTORCYCLE...11060077- SKU:
- 11060077
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
- UNITS:
- 4 PACK
- TYPE:
- COUNTERSHAFT
MSRP: $45.95Now: $41.81Was: $45.95 -
On Sale
EASTERN MOTORCYCLE PARTS Bearing - 8963 40-0325
EASTERN MOTORCYCLE PARTS
MSRP: $31.95Now: $29.07Was: $31.95A worn or damaged transmission bearing compromises shift quality, introduces noise, and accelerates drivetrain wear—ultimately threatening the reliability of your entire powertrain. The EASTERN...11060078- SKU:
- 11060078
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- BEARING
- STYLE:
- LEFT SIDE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- COUNTERSHAFT
MSRP: $31.95Now: $29.07Was: $31.95Qty in Cart: 0Quantity:Price:MSRP: $31.95Now: $29.07Was: $31.95Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Mainshaft - Bearing 40-0345
EASTERN MOTORCYCLE PARTS
MSRP: $10.95Now: $9.96Was: $10.95A precision mainshaft bearing is critical to your 5-speed transmission's reliability and longevity. This Eastern Motorcycle Parts component ensures smooth power transfer with minimal friction,...11060079- SKU:
- 11060079
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- NEEDLE BEARING
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
MSRP: $10.95Now: $9.96Was: $10.95Qty in Cart: 0Quantity:Price:MSRP: $10.95Now: $9.96Was: $10.95Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Main Drive Gear 42-0100
EASTERN MOTORCYCLE PARTS
Now: $8.55Was: $9.40A worn or damaged main drive gear compromises your motorcycle's power delivery and can lead to costly secondary damage to your transmission. The EASTERN MOTORCYCLE PARTS Main Drive Gear 42-0100 is a...11060081- SKU:
- 11060081
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- RETAINING RING
- TRANSMISSION TYPE:
- 6 SPEED
- RIDING STYLE:
- STREET
- TYPE:
- MAIN DRIVE GEAR
- STYLE:
- OEM REPLACEMENT
- UNITS:
- 10 PACK
Now: $8.55Was: $9.40 -
On Sale
EASTERN MOTORCYCLE PARTS Main Drive Gear A-10991
EASTERN MOTORCYCLE PARTS
Now: $8.55Was: $9.40The main drive gear is the critical component that transfers engine power directly to your motorcycle's transmission, making it essential for reliable operation and consistent performance. A worn or...11060082- SKU:
- 11060082
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- RETAINING RING
- TRANSMISSION TYPE:
- 6 SPEED
- RIDING STYLE:
- STREET
- TYPE:
- MAIN DRIVE GEAR
- STYLE:
- OEM REPLACEMENT
- UNITS:
- 10 PACK
Now: $8.55Was: $9.40 -
On Sale
EASTERN MOTORCYCLE PARTS Sprocket Shaft Nut - 35211-91 A-35211-91
EASTERN MOTORCYCLE PARTS
MSRP: $20.95Now: $19.06Was: $20.95A worn or damaged sprocket shaft nut compromises your drivetrain's structural integrity and can lead to catastrophic failure during operation. This OEM-specification replacement ensures proper...11060083- SKU:
- 11060083
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- SPROCKET
- RIDING STYLE:
- STREET
- STYLE:
- OEM REPLACEMENT
- PRODUCT NAME:
- NUT
- UNITS:
- EACH
MSRP: $20.95Now: $19.06Was: $20.95 -
On Sale
EASTERN MOTORCYCLE PARTS Shifter Shaft - 34628-54A A-34628-54A
EASTERN MOTORCYCLE PARTS
MSRP: $39.95Now: $36.35Was: $39.95A worn or damaged shifter shaft compromises your bike's ability to find gears reliably—something you can't afford mid-ride or on the track. This OEM-equivalent shifter shaft restores precise...11060086- SKU:
- 11060086
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- STYLE:
- OEM REPLACEMENT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- SHIFT LEVER SHAFT
MSRP: $39.95Now: $36.35Was: $39.95 -
On Sale
EASTERN MOTORCYCLE PARTS Shifter Shaft Spring A-34087-79A
EASTERN MOTORCYCLE PARTS
Now: $14.65Was: $16.10A worn or damaged shifter shaft spring compromises your bike's shifting precision and can lead to missed gears or sloppy engagement—exactly what you don't want in demanding riding conditions. This...11060048- SKU:
- 11060048
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- SHIFTER SHAFT
- RIDING STYLE:
- STREET
- STYLE:
- OEM REPLACEMENT
- PRODUCT NAME:
- SPRING
- UNITS:
- 5 PACK
Now: $14.65Was: $16.10 -
On Sale
EASTERN MOTORCYCLE PARTS Shifter Lever Spring - 34083-79 A-34083-79
EASTERN MOTORCYCLE PARTS
Now: $15.93Was: $17.50A worn or damaged shifter lever spring compromises your bike's shifting precision and can lead to missed gears or sluggish engagement when you need reliability most. This OEM-spec replacement...11060049- SKU:
- 11060049
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- PRODUCT NAME:
- SPRING
- TYPE:
- PAWL SPRING
- STYLE:
- OEM REPLACEMENT
Now: $15.93Was: $17.50Qty in Cart: 0Quantity:Price:Now: $15.93Was: $17.50Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Shifter Lever Spring - 34977-00A A-34977-00A
EASTERN MOTORCYCLE PARTS
Now: $7.37Was: $8.10A worn or damaged shifter lever spring compromises your bike's shifting precision and can lead to missed gears under load. This OEM replacement spring restores positive engagement and reliable shift...11060050- SKU:
- 11060050
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- STYLE:
- OEM REPLACEMENT
- UNITS:
- 10 PACK
- PRODUCT NAME:
- SPRING
- RIDING STYLE:
- STREET
- TYPE:
- PAWL SPRING
Now: $7.37Was: $8.10 -
On Sale
EASTERN MOTORCYCLE PARTS Mainshaft Bearing A-35030-89
EASTERN MOTORCYCLE PARTS
MSRP: $31.95Now: $29.07Was: $31.95The mainshaft bearing is the critical pivot point that enables smooth, reliable power delivery through your 5-speed transmission. A worn or damaged bearing introduces play, noise, and premature wear...11060182- SKU:
- 11060182
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- STYLE:
- TRAP DOOR
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
MSRP: $31.95Now: $29.07Was: $31.95 -
On Sale
EASTERN MOTORCYCLE PARTS Spacer Countershaft - 2nd Gear 44-0512
EASTERN MOTORCYCLE PARTS
MSRP: $4.95Now: $4.50Was: $4.95A worn or damaged countershaft spacer directly impacts gear engagement and transmission reliability—especially under high-load conditions where precision tolerances are critical. The EASTERN...11060187- SKU:
- 11060187
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- SPACER
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- TYPE:
- SECOND GEAR
MSRP: $4.95Now: $4.50Was: $4.95 -
On Sale
EASTERN MOTORCYCLE PARTS Main Drive Bearing - 8956 44-0516
EASTERN MOTORCYCLE PARTS
MSRP: $73.95Now: $67.29Was: $73.95A worn or failing main drive bearing will compromise your entire drivetrain, leading to increased friction, vibration, and catastrophic engine damage if left unchecked. The Eastern Motorcycle Parts...11060188- SKU:
- 11060188
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- TRANSMISSION TYPE:
- 5 SPEED
- UNITS:
- EACH
MSRP: $73.95Now: $67.29Was: $73.95 -
On Sale
EASTERN MOTORCYCLE PARTS Countershaft Gear - 35717-74 W-14-174
EASTERN MOTORCYCLE PARTS
MSRP: $72.95Now: $66.38Was: $72.95A countershaft gear is critical to your motorcycle's transmission reliability and shift quality. Worn or damaged countershaft gears lead to poor engagement, grinding, and accelerated wear on mating...11060190- SKU:
- 11060190
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- TOOTH COUNT:
- 24
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GEAR
- TYPE:
- COUNTERSHAFT
- TYPE:
- FIRST GEAR
- TRANSMISSION TYPE:
- 4 SPEED
MSRP: $72.95Now: $66.38Was: $72.95Qty in Cart: 0Quantity:Price:MSRP: $72.95Now: $66.38Was: $72.95Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacers - 0.030" A-35852-84
EASTERN MOTORCYCLE PARTS
Now: $6.10Was: $6.70Improper sprocket alignment introduces premature wear, vibration, and potential catastrophic drivetrain failure. These precision spacers deliver the exact 0.030" offset required for proper front...DS196153- SKU:
- DS196153
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- SPROCKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
Now: $6.10Was: $6.70 -
On Sale
EASTERN MOTORCYCLE PARTS Countershaft Bushing - Clutch Side A-36048-36
EASTERN MOTORCYCLE PARTS
MSRP: $28.95Now: $26.34Was: $28.95A worn countershaft bushing compromises clutch engagement precision and accelerates drivetrain wear—replacing it restores smooth power transfer and extends transmission life. This OEM-spec Eastern...DS196171- SKU:
- DS196171
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH SIDE
- UNITS:
- EACH
MSRP: $28.95Now: $26.34Was: $28.95 -
On Sale
EASTERN MOTORCYCLE PARTS Countershaft Bushing - Clutch Side A-36048-76A
EASTERN MOTORCYCLE PARTS
MSRP: $28.95Now: $26.34Was: $28.95A worn countershaft bushing compromises clutch engagement precision and accelerates drivetrain wear—replacing it restores smooth shifts and extends the life of your transmission. This Eastern...DS196172- SKU:
- DS196172
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH SIDE
- UNITS:
- EACH
- PRODUCT NAME:
- BUSHING
MSRP: $28.95Now: $26.34Was: $28.95 -
On Sale
EASTERN MOTORCYCLE PARTS Countershaft Bushing - Starter Side A-36046-36
EASTERN MOTORCYCLE PARTS
MSRP: $28.95Now: $26.34Was: $28.95The countershaft bushing is a critical wear component that directly impacts shift quality and drivetrain longevity. Over time, bushing degradation causes excessive play in your countershaft, leading...DS196173- SKU:
- DS196173
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- STARTER SIDE
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $28.95Now: $26.34Was: $28.95 -
On Sale
EASTERN MOTORCYCLE PARTS Countershaft Bushing - Starter Side A-36045-76
EASTERN MOTORCYCLE PARTS
MSRP: $28.95Now: $26.34Was: $28.95A worn countershaft bushing compromises shift quality and accelerates drivetrain wear—this OEM Eastern component restores precise tolerances and smooth engagement. Whether you're rebuilding a 4-speed...DS196174- SKU:
- DS196174
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- TYPE:
- STARTER SIDE
MSRP: $28.95Now: $26.34Was: $28.95
