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1981 Honda CB900C Custom Steering Bearing Service

Identify the steering assembly and any previous bearing conversion before ordering for your 1981 CB900C Custom. The tapered kit includes upper and lower races, while the stem nut, washer and top lock nut remain separate hardware choices. Keep their positions clear during inspection and ordering.

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Honda motorcycle parts

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Honda CB1100 CB1000 CB900 CB750 steering bearing kit

Honda CB1100 / CB1000 / CB900 / CB750 Steering Bearing Kit

$59.95 USD
28-2006
Upgrade your DOHC CB steering bearings with this Steering Bearing Kit. Tapered roller steering bearing conversion kit, superior to OEM quality with 10X the...
Honda CB1100 CB1000 CB900 CB750 steering stem washer 90503-425-000

Honda CB Steering Stem Washer ~ Replaces 90503-425-000

$5.80 USD
73-1127
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...
Honda CB1100 CB1000 CB900 steering stem head lock nut 90302-425-830

Honda CB Steering Stem Head Lock Nut ~ Replaces 90302-425-830

$8.95 USD
29-7025
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...
Honda CB1100 CB1000 CB900 CB750 CB700 steering stem nut 90304-425-000

Honda CB Steering Stem Nut ~ Replaces 90304-425-000

$8.95 USD
73-1128
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...
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1981 Honda CB900C Custom · Steering Bearing Service Buying guide

Plan the bearing conversion and stem hardware separately

The listed tapered-bearing kit and separate stem hardware solve different problems. Keep upper and lower bearings and races identified, and inspect the stem threads before deciding whether the repair needs bearings, fasteners or both.

Parts to consider

Honda CB1100 / CB1000 / CB900 / CB750 Steering Bearing Kit Tapered steering-bearing kitJapanese-made conversion kit with upper and lower tapered bearing races.View part Honda CB Steering Stem Nut ~ Replaces 90304-425-000 Steering-stem nutIndividual nut, reference 90304-425-000; washer supplied separately.View part Honda CB Steering Stem Washer ~ Replaces 90503-425-000 Steering-stem washerIndividual washer, reference 90503-425-000.View part

Related parts: Steering head lock nut

Inspect beyond the bearing surfaces

The kit supplies upper and lower tapered bearing races. Check the surrounding steering assembly and follow the proper installation and adjustment method. A new bearing kit does not establish that damaged stem threads or unrelated fasteners can be retained.

Use references to separate the fasteners

The top stem nut 90304-425-000 uses the separately listed washer 90503-425-000. Honda also shows a thread B nut, locking washer and bearing-adjustment nut below the top bridge. Match each position carefully; the listed top-nut washer should not be mistaken for the separate locking washer.

Buying questions

Will a new stem nut cure notchy steering?

A nut does not repair damaged bearing surfaces. Honda calls for bearing and race inspection and replacing the bearing with its matching races when needed. Diagnose the roughness before choosing hardware alone, and use the steering adjustment procedure after the repair.

Is the top-nut washer the locking washer below the bridge?

They occupy different positions. Honda shows a separate locking washer with the lower steering nuts. The listed 90503-425-000 washer belongs with the top stem nut; identify the removed part from the assembly diagram before ordering.

How do I distinguish the two listed nuts?

Use the part references and assembly positions: 90304-425-000 is the stem nut, while 90302-425-830 is the top thread-on lock nut. Compare the service diagram and removed hardware.

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Send your model and year, plus photos of your existing part and any changes to the original setup.

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