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1985 Honda CB650SC Nighthawk — Composants et amortisseurs de direction

Inspect the steering bearings and stem hardware before preparing a front-end repair on your 1985 CB650SC. The tapered-bearing conversion kit includes upper and lower races, while the stem nut and washer are separate products with their own replacement references.

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Honda CB750 CB650 CB550 CB450 CB400 steering bearing kit (2)

Honda CB Steering Bearing Kit (2)

$69.95 USD
28-2011
Upgrade your steering bearings with this Steering Bearing Kit. Tapered roller steering bearing conversion kit, superior to OEM quality with 10X the contact area...
Honda CB750 CB650 CB550 CB450 CB400 steering bearing kit

Honda CB Steering Bearing Kit

$69.95 USD
28-2011
Upgrade your steering bearings with this Steering Bearing Kit. Tapered roller steering bearing conversion kit, superior to OEM quality with 10X the contact area...
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 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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1985 Honda CB650SC Nighthawk · Steering Bearings & Hardware Buying guide

Plan bearing service and stem hardware together

Choose the bearing kit for the applicable steering assembly, then check the stem nut and washer. Their separate listings let you replace worn hardware without assuming it arrives in the bearing kit.

Parts to consider

Honda CB Steering Bearing Kit Tapered steering-bearing kitJapanese-made tapered-roller conversion kit supplying upper and lower bearings with matching races for one steering head.Voir la pièce Honda CB Steering Stem Nut ~ Replaces 90304-425-000 Steering stem nutReference 90304-425-000; sold individually with the washer separate.Voir la pièce Honda CB Steering Stem Washer ~ Replaces 90503-425-000 Steering stem washerReference 90503-425-000; individually supplied companion to the stem nut.Voir la pièce

Check the complete steering assembly

The conversion kit has a stated late-CB650SC application and includes upper and lower tapered bearing races. Confirm the frame and steering components before ordering after a front-end change. Follow the appropriate service instructions for installation and bearing adjustment rather than assuming the old setup applies unchanged.

Inspect the nut and washer separately

The stem nut is sold individually, with the washer available as its own product. Check the existing hardware and threads when planning bearing work. Replace what inspection requires, while avoiding an assumption that the conversion kit supplies these external fastening pieces.

Ordering questions

Does tightening the upper stem nut set the bearing adjustment?

The stem-nut guidance calls for setting bearing preload by the correct service procedure first, then fitting the correct washer and tightening the upper nut without disturbing that adjustment. Check for smooth steering with no notchiness, binding or play afterward; extra top-nut tightening is not a substitute for diagnosis.

Can an ordinary washer substitute if its hole fits the stem?

The specified washer’s thickness and seating surface affect the upper hardware’s clamping. Compare the original arrangement and reference 90503-425-000 rather than choosing by hole diameter alone. The matching nut and washer are separately supplied, so inspect both during steering service.

Can this kit be chosen by motorcycle year after a front-end swap?

Identify the fitted steering stem and frame bearing arrangement first. The year-specific listing alone does not establish compatibility for a mixed or modified front-end assembly.

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