Sonnax
Sonnax is a recognized name in precision drivetrain components, offering high-quality transmission bearings, valve train parts and performance upgrades for motorcycles and automotive applications. Known for engineering reliability, Sonnax products support smooth operation and long service life. Riders and mechanics searching for motorcycle transmission parts, mainshaft bearings, camshaft bearings, clutch bearings and engine valve components rely on Sonnax for dependable performance. Ideal for rebuilds, repairs and performance-focused drivetrain upgrades.
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V-Twin - 12-9937 - Transmission Mainshaft Ball Bearing
Sonnax
$44.83V-Twin - 12-9937 - Transmission Mainshaft Ball Bearing Description Transmission mainshaft shielded ball bearing. Fits: UL 1937-1948 FX 1971-1984 EL 1936-1940 FL 1941-1984 Additional...$44.83 -
V-Twin - 12-4588 - Transmission Roller .0004
Sonnax
$30.78V-Twin - 12-4588 - Transmission Roller .0004 Description Transmission .0004 rollers is a 100 piece set. Fits: K 1952-1956 XL 1957-1990 Additional Information OEM No...$30.78 -
V-Twin - 12-0765 - Cam Shaft Left Side Bearing
Sonnax
MSRP: $21.88$20.29V-Twin - 12-0765 - Cam Shaft Left Side BearingDescriptionCam shaft bearing for left side.For use with bearing, as listed. Fits:FXD 2006-2017FLST 2007-2017FLT 2007-UPFXST 2007-2017Additional...MSRP: $21.88$20.29 -
V-Twin - 12-0751 - Cam Shaft Ball Bearing
Sonnax
MSRP: $34.13$31.90V-Twin - 12-0751 - Cam Shaft Ball BearingDescriptionCam shaft ball bearing. Fits:FLST 1999-2006FXST 1999-2006FLT 1999-2006FXD 1999-2005Additional Information OEM No.8990 A UOM1 - EA ...MSRP: $34.13$31.90 -
V-Twin - 12-0750 - Left Side Cam Shaft Bearing
Sonnax
MSRP: $23.53$21.99V-Twin - 12-0750 - Left Side Cam Shaft BearingDescriptionCam shaft bearing, left side.For use with bearing, as listed. Fits:FLST 1999-2006FXST 1999-2006FLT 1999-2006FXD 1999-2005Additional...MSRP: $23.53$21.99 -
V-Twin - 12-0366 - Transmission Four Piece Bearing Set
Sonnax
$56.60V-Twin - 12-0366 - Transmission Four Piece Bearing SetDescriptionTransmission bearing, 5 speed. Fits:FXD 1991-2005FLST 1986-2006FLT 1979-2006FXR 1982-1994XL 1991-UPFXST 1998-2006Additional...$56.60 -
V-Twin - 12-0359 - Transmission Mainshaft Right Bearing
Sonnax
MSRP: $36.25$33.89V-Twin - 12-0359 - Transmission Mainshaft Right BearingDescriptionMainshaft right side bearing Fits:XL 1984-1990Additional Information OEM No.9118 UOM1 - EA ManufacturerSonnax OriginUSA 2025...MSRP: $36.25$33.89 -
V-Twin - 12-0342 - Clutch Throw Out Bearing
Sonnax
MSRP: $21.96$18.66V-Twin - 12-0342 - Clutch Throw Out BearingDescriptionClutch throw out bearing only. Fits:FX 1975-1984FL 1975-1984FXD 1991-2017FLST 1986-2017FXST 1984-2017FLT 1984-UPFXR 1984-1994Additional...MSRP: $21.96$18.66 -
V-Twin - 12-0339 - Transmission Countershaft Needle Bearing
Sonnax
MSRP: $45.35$45.26V-Twin - 12-0339 - Transmission Countershaft Needle BearingDescriptionCountershaft needle bearing, closed end type, for 5-speed transmissions. Fits:FXD 1991-2005FLST 1986-2006FLT 1979-2006FXR...MSRP: $45.35$45.26 -
V-Twin - 12-0327 - Open Type Transmission Needle Bearing
Sonnax
$25.44V-Twin - 12-0327 - Open Type Transmission Needle BearingDescriptionThis countershaft needle bearing is open end type. It features a full compliment roller design. Fits:FL 1976-1984K 1952-1956FX...$25.44 -
V-Twin - 12-0326 - Transmission Needle Bearing Closed Type
Sonnax
$28.88V-Twin - 12-0326 - Transmission Needle Bearing Closed TypeDescriptionBearing features full compliment roller design. Fits:XL 1957-1990K 1954-1956Additional Information OEM No.35960-54 UOM1 - EA ...$28.88 -
V-Twin - 12-0321 - Koyo Pinion Shaft Bearing
Sonnax
$124.55V-Twin - 12-0321 - Koyo Pinion Shaft BearingDescriptionKoyo pinion shaft bearing. Fits:XL 1977-1986Additional Information OEM No.24648-77 UOM1 - EA ManufacturerSonnax OriginUSA TypePinion Shaft ...$124.55 -
V-Twin - 12-0319 - Generator Brush End Cover Bearing
Sonnax
$25.46V-Twin - 12-0319 - Generator Brush End Cover BearingDescriptionGenerator brush end cover bearing is for a 6 or 12 volt, 2-brush generator. Fits:XL 1958-1980FL 1958-1969Additional Information OEM No...$25.46 -
V-Twin - 12-0318 - Outer Primary Cover Needle Bearing
Sonnax
$27.03V-Twin - 12-0318 - Outer Primary Cover Needle BearingDescriptionThis starter needle bearing for the outer primary cover is designed for OEM applications. Fits:FXR 1984-1988 for starter housing and...$27.03 -
V-Twin - 12-0317 - Starter Housing Needle Bearing
Sonnax
MSRP: $27.22$27.14V-Twin - 12-0317 - Starter Housing Needle BearingDescriptionStarter housing needle bearing for a Hitachi starter is for use on 4-speed models.This starter housing needle bearing is manufactured to...MSRP: $27.22$27.14 -
V-Twin - 12-0316 - Koyo Cam Needle Bearing
Sonnax
MSRP: $28.98$28.79V-Twin - 12-0316 - Koyo Cam Needle BearingDescriptionKoyo cam needle bearing has a roller design. For 1958-1999 Big Twin models.Our cam needle bearings are manufactured to meet OEM specifications for...MSRP: $28.98$28.79 -
V-Twin - 12-0315 - Cam Gear Bearing
Sonnax
$23.69V-Twin - 12-0315 - Cam Gear BearingDescriptionOur cam bearings are manufactured to meet OEM specifications for long lasting durability and performance. Fits:XL 1957-1990Additional Information OEM No...$23.69 -
V-Twin - 12-0300 - Koyo Transmission Main Drive Bearing
Sonnax
$48.50V-Twin - 12-0300 - Koyo Transmission Main Drive BearingDescriptionKoyo transmission main drive bearing for Big Twin models.Bearing measures 2.005" outer diameter x .61" wide x 1.638" inner diameter...$48.50 -
Out of stock
V-Twin - 11-0821 - Lower Valve Collar Kit
Sonnax
MSRP: $74.70$67.23V-Twin - 11-0821 - Lower Valve Collar KitDescriptionSifton lower collar and seal kit includes 4 lower collars machined to accept K line style seals. 2 intake seals and 2 exhaust seals included.Top of...MSRP: $74.70$67.23 -
V-Twin - 11-0028 - Hydraulic Pushrod Tappet Set
Sonnax
MSRP: $207.96$196.51V-Twin - 11-0028 - Hydraulic Pushrod Tappet SetDescriptionSifton hydraulic pushrod tappet set includes 4 max axle lifters with integral pump and 4 adjustable steel pushrods. Fits:FLT 1979-1983FX...MSRP: $207.96$196.51
Sonnax Precision Drivetrain Systems – Transmission Components, Bearings & Performance Upgrades
Sonnax is a trusted manufacturer of high-performance transmission components and drivetrain solutions, widely known for precision engineering and long-lasting durability. Designed to meet demanding mechanical standards, Sonnax products help improve efficiency, reduce wear and enhance overall drivetrain performance. Frequently associated with searches like motorcycle transmission rebuild parts, transmission bearing kits, drivetrain upgrade components and high performance engine internals, Sonnax continues to be a reliable choice for both professional mechanics and performance enthusiasts.
The Sonnax product lineup includes essential components such as transmission mainshaft bearings, needle bearings, roller bearings, camshaft bearings, clutch throw-out bearings and complete transmission bearing kits. Additional offerings like hydraulic pushrod tappet sets and valve collar kits support engine performance and reliability. These parts are commonly used in Harley-Davidson and V-Twin applications, meeting strong demand for motorcycle engine rebuild parts, camshaft bearing replacement, transmission repair kits and clutch system components, ensuring proper fitment and consistent operation.
Built for durability and precision, Sonnax components are engineered to handle high loads, reduce friction and extend service intervals in both stock and performance engines. Whether performing a full rebuild or replacing critical wear items, users benefit from improved drivetrain efficiency and reliability. With increasing demand for motorcycle transmission upgrades, engine bearing kits, V-Twin performance parts and drivetrain repair solutions, Sonnax remains a dependable choice for maintaining and enhancing motorcycle performance.