Steering-head service on the 1981 CB900F Supersport may require bearings, damaged threaded hardware or both. The tapered bearing kit and two different stem nuts serve distinct positions, so identify each part in the assembly before deciding what to replace.
1980 Honda CB750C Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB750C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750C Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB750SC Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1983 Honda CB1100F Motorcycle Parts1983 Honda CB750SC Motorcycle PartsHonda CB Rims, Spokes, Wheel Bearings & SealsHonda CB Steering Bearings, Hardware & DampersHonda CB Suspension & Wheel PartsHonda CB1000 Motorcycle Parts by Model & YearHonda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB750SC Nighthawk Motorcycle Parts (1982–1986)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 3: CB700-750SC (82-86)Series 4: CB900-1100 (80-83)
Upgrade your DOHC CB steering bearings with this Steering Bearing Kit. Tapered roller steering bearing conversion kit, superior to OEM quality with 10X the...
1979 Honda CB650 Motorcycle Parts1979 Honda CB750F Motorcycle Parts1979 Honda CB750K Motorcycle Parts1979 Honda CB750L Motorcycle Parts1980 Honda CB650 Motorcycle Parts1980 Honda CB650C Custom Motorcycle Parts1980 Honda CB750C Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB650 Motorcycle Parts1981 Honda CB650C Custom Motorcycle Parts1981 Honda CB750C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB650 Motorcycle Parts1982 Honda CB650SC Nighthawk Motorcycle Parts1982 Honda CB750C Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1983 Honda CB1100F Motorcycle Parts1983 Honda CB550SC Nighthawk Motorcycle Parts1983 Honda CB650SC Nighthawk Motorcycle Parts1984 Honda CB650SC Nighthawk Motorcycle Parts1984 Honda CB700SC Motorcycle Parts1985 Honda CB650SC Nighthawk Motorcycle Parts1985 Honda CB700SC Motorcycle Parts1986 Honda CB700SC Motorcycle PartsHonda CB Steering Bearings, Hardware & DampersHonda CB Suspension & Wheel PartsHonda CB1000 Motorcycle Parts by Model & YearHonda CB550 Motorcycle Parts by Model & YearHonda CB550SC Nighthawk Motorcycle Parts (1983–1984)Honda CB650 Motorcycle Parts (1979–1982)Honda CB650 Motorcycle Parts by Model & YearHonda CB650C Custom Motorcycle Parts (1980–1981)Honda CB650SC Nighthawk Motorcycle Parts (1982–1985)Honda CB700SC Nighthawk Motorcycle Parts (1984–1986)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 3: CB700-750SC (82-86)Series 4: CB900-1100 (80-83)Series 5: CB650 (79-82)Series 6: CB500-CB550 (71-78)
Complete your steering assembly with this OEM-spec Steering Stem Washer, engineered for secure and precise fitment. A vital component when servicing or rebuilding your...
1980 Honda CB750C Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB750C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750C Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB750SC Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1983 Honda CB1100F Motorcycle Parts1983 Honda CB750SC Motorcycle Parts1984 Honda CB700SC Motorcycle Parts1985 Honda CB700SC Motorcycle Parts1986 Honda CB700SC Motorcycle Parts1994 Honda CB1000 Motorcycle Parts1995 Honda CB1000 Motorcycle PartsHonda CB Steering Bearings, Hardware & DampersHonda CB Suspension & Wheel PartsHonda CB1000 Motorcycle Parts by Model & YearHonda CB700SC Nighthawk Motorcycle Parts (1984–1986)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB750SC Nighthawk Motorcycle Parts (1982–1986)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 3: CB700-750SC (82-86)Series 4: CB900-1100 (80-83)
Replace your steering stem head lock nut with this Steering Stem Head Top Thread-On Lock Nut, replacing OEM #90302-425-830.Key Features• Steering stem head top...
1979 Honda CB650 Motorcycle Parts1979 Honda CB750F Motorcycle Parts1979 Honda CB750K Motorcycle Parts1979 Honda CB750L Motorcycle Parts1980 Honda CB650 Motorcycle Parts1980 Honda CB650C Custom Motorcycle Parts1980 Honda CB750C Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB650 Motorcycle Parts1981 Honda CB650C Custom Motorcycle Parts1981 Honda CB750C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB650 Motorcycle Parts1982 Honda CB650SC Nighthawk Motorcycle Parts1982 Honda CB750C Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1983 Honda CB1100F Motorcycle Parts1983 Honda CB550SC Nighthawk Motorcycle Parts1983 Honda CB650SC Nighthawk Motorcycle Parts1984 Honda CB650SC Nighthawk Motorcycle Parts1984 Honda CB700SC Motorcycle Parts1985 Honda CB650SC Nighthawk Motorcycle Parts1985 Honda CB700SC Motorcycle Parts1986 Honda CB700SC Motorcycle PartsHonda CB Steering Bearings, Hardware & DampersHonda CB Suspension & Wheel PartsHonda CB1000 Motorcycle Parts by Model & YearHonda CB550 Motorcycle Parts by Model & YearHonda CB550SC Nighthawk Motorcycle Parts (1983–1984)Honda CB650 Motorcycle Parts (1979–1982)Honda CB650 Motorcycle Parts by Model & YearHonda CB650C Custom Motorcycle Parts (1980–1981)Honda CB650SC Nighthawk Motorcycle Parts (1982–1985)Honda CB700SC Nighthawk Motorcycle Parts (1984–1986)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 3: CB700-750SC (82-86)Series 4: CB900-1100 (80-83)Series 5: CB650 (79-82)Series 6: CB500-CB550 (71-78)
Ensure your front end stays tight and aligned with this high-quality Steering Stem Nut. Designed to match the factory OEM specifications, this nut is...
The bearing conversion kit includes upper and lower tapered bearing races. Separate stem nuts carry different reference numbers, while the stem washer is available on its own for the matching hardware position.
The tapered kit includes upper and lower bearings with races. Inspect the stem and bearing seats, and use the kit’s installation guidance together with the Honda assembly procedure. Tapered-bearing setup needs a correct adjustment and final free-movement check; the stem top nut and adjusting hardware have different jobs.
Do not interchange similar-looking nuts
The stem nut replaces 90304-425-000; the head lock nut replaces 90302-425-830. Use their assembly positions and references to tell them apart. The linked stem washer replaces 90503-425-000 and is sold separately, so check whether your repair requires that piece too.
Buying questions
Can tightening the steering head cure a notch at straight ahead?
Adjustment can address incorrect free play, but it cannot repair pitted or notched bearing surfaces. Inspect the bearings and races when the steering feels rough or catches at center. Avoid tightening until the steering binds to hide worn parts.
Are the stem top nut and threaded head lock nut interchangeable?
No. They occupy different positions and have different references: 90304-425-000 for the stem nut and 90302-425-830 for the head lock nut. Match the assembly drawing and inspect the threads; do not apply one fastener’s tightening procedure to the other.
What should be checked after fitting tapered bearings?
Follow the bearing kit and Honda assembly guidance, then verify smooth steering without excessive play or binding. Check cable and hose movement through the steering range too. Recheck the installation as the kit instructions require rather than assuming a new bearing is correctly adjusted by feel alone.
Not sure which part you need?
Send your model and year, plus photos of your existing part and any changes to the original setup.