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1980 Honda CB650 Fork Seals & Retaining Rings

Compare the layers around the fork seals before ordering parts for a 1980 CB650. Oil seals, dust seals and retaining rings are separate products. Check the installed fork and old seal dimensions so an earlier front-end swap does not lead to a model-year-only purchase.

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Most orders ship same or next business day Fitment guarantee Listed for your exact model and year? We’ll make it right if it doesn’t fit as described. Mechanic-backed support Ask our team for help choosing the right Honda CB part.
Currently viewing Fork Tubes, Springs, Seals & Boots

Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

Honda CB750 CB650 CB550 CB500 fork seals

Honda CB750 / CB650 / CB550 / CB500 Fork Seals

$19.95 USD
27-1007
Replace your fork seals with this Fork Seal Set, 35 x 48 x 10.5 / 11mm. High quality, made in Japan. Key Features• Fork...
Honda CB750 CB650 CB550 CB500 fork seal stopper metal rings (pk 2) 51447-KL4-951

Honda CB750 / CB650 / CB550 / CB500 Fork Seal Stopper Metal Rings (Pk/2) ~ Replaces 51447-KL4-951

$7.95 USD
73-0940
Replace your fork seal stopper metal rings with this Fork Seal Stopper Metal Ring Pk/2, replacing OEM #51447-KL4-951. This is the metal ring above...
Honda CB750 CB650 SL350K2 fork dust seal set

Honda CB750 / CB650 / SL350K2 Fork Dust Seal Set

$24.95 USD
27-1049
Replace your DOHC CB750 or CB650 fork dust seals with this Fork Dust Seal Set of 2. OEM-quality parts made in Japan.Key Features• Fork...
Honda CB750 CB650 CB550 front fork damper valve set

Honda CB750 / CB650 / CB550 Front Fork Damper Valve Set

$79.95 USD
27-1886
Upgrade your 35mm rod-style front forks to perform like modern cartridge forks with this Front Fork Damper Valve Set of 2. These tunable valves...
New
Universal motorcycle headlight reflector rubber base 33743-425-600

Universal Motorcycle Headlight Reflector Rubber Base ~ Replaces 33743-425-600

$16.95 USD
99-4979
Upgrade or restore your Honda motorcycle’s headlight assembly with this Headlight Reflector Rubber Base — precision‑designed to replace OEM #33743‑425‑600. This rubber base provides...
New
Honda CB750 CB650 headlight stay headlight reflector bolt 90120-425-000

1979-83 Honda CB750 / CB650 Headlight Stay / Headlight Reflector Bolt ~ Replaces 90120-425-000

$8.95 USD
99-4975
Replacement headlight stay bolt for restoring your CB750's headlight assembly back to proper condition. This is the bolt that fastens through the headlight ears,...
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
99-5318
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 CB650 · Fork Seals & Retaining Rings Buying guide

Inspect oil seals, dust seals and retainers together

The oil-seal set has a stated 35 × 48 × 10.5/11mm size. The dust seals and metal stopper rings are each separate two-piece products for the parts found worn or damaged.

Parts to consider

Honda CB750 / CB650 / CB550 / CB500 Fork Seals Fork oil-seal setTwo Japanese-made fork oil seals measuring 35 × 48 × 10.5/11 mm, enough for both fork legs on one compatible motorcycle; check the fitted forks.View part Honda CB750 / CB650 / CB550 / CB500 Fork Seal Stopper Metal Rings (Pk/2) ~ Replaces 51447-KL4-951 Fork seal stopper pairTwo metal retaining rings fitted above the fork oil seals.View part Honda CB750 / CB650 / SL350K2 Fork Dust Seal Set Fork dust-seal pairTwo Japanese-made dust seals for the listed CB650 forks.View part

Check the complete seal size

Tube diameter does not describe every oil-seal dimension. Compare 35 × 48 × 10.5/11mm with the old seal and the fork specification. If the front end has been replaced, identify that assembly before relying on the motorcycle’s original year.

Plan the surrounding service parts

The dust-seal package contains two pieces, and the stopper-ring package contains two metal rings fitted above the oil seals. Inspect those retained components and choose replacements by condition. Follow the correct service procedure for the fitted fork.

Ordering questions

Does 10.5/11 mm mean I can choose either seal height?

The listing gives the combined size 35 × 48 × 10.5/11 mm but does not explain the slash or describe alternative seals in the pack. Obtain a dimensioned specification before treating either figure as a selectable substitute for a different fork.

What can prevent a new stopper ring from retaining the seal correctly?

Corrosion, distortion or debris in the retaining groove can prevent full seating. The stopper-ring guidance calls for cleaning and inspecting the groove and ring, then confirming that each ring snaps completely into place. New rubber seals do not resolve damaged retaining hardware.

Should I replace the retaining rings with the seals?

Inspect their condition and seating arrangement first. The available stopper set contains two rings; add it when the service assessment calls for replacements rather than assuming rings are included with the seals.

Not sure which part you need?

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

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