1980 Honda CB900C Fork Seals & Cap O-Rings

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Consultation en cours Tubes, ressorts, joints et soufflets de fourche

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Honda CB900 / CB750 / CB650 / CB550 Fork Seals

$21.95 USD

Replace your DOHC Supersport or Nighthawk fork seals with this Fork Seal Set, 37 x 50 x 11mm. Made in Japan by OEM supplier.Key...

Honda CB900 CB750 CB650 fork cap o-ring set 2 91344-PC9-004

1980-83 Honda CB900 / CB750 / CB650 Fork Cap O-Ring Set/2 ~ Replaces 91344-PC9-004

$2.95 USD

Replace your fork cap O-rings with this Fork Cap O-Ring Set of 2, replacing OEM #91344-PC9-004.Key Features• Fork cap O-rings• Set of 2• Replaces...

Honda CB900 / CB750 / CB650 / CB550 Fork Dust Seal Set

$25.95 USD

Replace your DOHC Supersport / Nighthawk fork dust seals with this Fork Dust Seal Set of 2. OEM-quality parts made in Japan.Key Features• Fork...

Honda CB1100 CB1000 CB900 CB750 16mm clutch oil filter rotor lock nut 90231-KCS-651

Honda CB 16mm Clutch / Oil Filter Rotor Lock Nut ~ Genuine Honda 90231-KCS-651 ~ Replaces 90231-KCS-651

$10.95 USD

This genuine Honda 16mm lock nut is used on compatible Honda CB clutch basket and oil filter rotor assemblies. It is a small hardware...

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1980-83 Honda CB1000C / CB900C Rear Shock Fork Gaitor ~ Genuine Honda OEM

$34.95 USD

Upgrade or restore your classic Honda motorcycle with this Rear Shock Fork Gaitor — genuine Honda OEM quality made to the factory specifications. This...

Honda CB900 CB750 CB650 CB550 front fork oil lock piece 51432-371-003

Honda CB900 / CB750 / CB650 / CB550 Front Fork Oil Lock Piece ~ Genuine Honda 51432-371-003

$29.95 USD

This genuine Honda front fork oil lock piece fits inside the front fork assembly on the Honda CB models listed below. It works with...

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1980 Honda CB900C Custom · Fork Seals & Cap O-Rings Buying guide

Distinguish oil seals, dust seals and cap seals

The 1980 CB900C’s original forks are air-assisted. Oil seals, outer dust seals and cap O-rings serve separate positions. The oil-seal specification is 37 × 50 × 11 mm; inspect the tubes and identify any fork swap before choosing seals.

Parts to consider

37 × 50 × 11mm fork sealsJapanese-made fork seal set for the CB900C application.Voir la pièce

Fork dust-seal pairTwo Japanese-made dust seals, separate from the fork oil-seal set.Voir la pièce

1980-83 Honda CB900 / CB750 / CB650 Fork Cap O-Ring Set/2 ~ Replaces 91344-PC9-004

Fork-cap O-ring pairTwo O-rings, reference 91344-PC9-004.Voir la pièce

Inspect the fork before replacing seals

Check the tube surfaces and the condition of the existing assembly as part of the repair. New seals do not establish that damaged surfaces are serviceable. Use the correct fork service procedure and specifications rather than assuming dimensions alone complete the repair plan.

Prepare for air pressure and the correct year’s fork data

Honda warns to release fork air pressure before cap removal and notes that the caps remain spring-loaded. Use the CB900C procedure and suitable protection. The 1981 addendum revises fork service data, so keep the correct year’s instructions with the repair rather than treating a shared seal size as a universal refill specification.

Buying questions

Will new oil seals cure a leak caused by a damaged fork tube?

Inspect the tube’s working surface and the rest of the fork before ordering a seal-only repair. Pitting or damage can compromise a fresh seal. The separate dust-seal pair protects the outer area but does not repair the tube or replace the internal oil seals.

Can the fork caps be removed as soon as the front wheel is unloaded?

The original forks still contain air pressure and spring load. Honda’s procedure releases the air first and warns about the spring-loaded caps. Plan the correct disassembly equipment and procedure before opening them to replace cap O-rings.

Do all 1980–82 forks use identical service quantities because the seals match?

No. Honda revised fork specifications in the 1981 CB900C addendum. Follow the base manual with the applicable year addenda for the fitted fork, and identify a swapped assembly separately. The common seal dimensions do not establish its spring or fluid specification.

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