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1972 Honda CB500K Fork Seals, Gaiters & Top Bolts

The 1972 CB500K1 fork selection includes size-specific seals, stock-type gaiter pairs and tube-cap bolts with O-rings. Identify whether the damage is at a seal, external boot or top bolt. Reflectors and their supports serve another position and must be checked as separate fittings.

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Currently viewing Fork Tubes, Springs, Seals & Boots

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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 CB550 CB500 CB450 fork gaiters 51611-300-000

Honda CB Stock Type Fork Gaitors ~ Replaces 51611-300-000

$29.95 USD
27-1061
Replace your fork gaitors with this Black Stock Type Fork Gaitors Set of 2, replacing OEM #51611-300-000.Key Features• Stock-type black fork gaitors, set of...
Honda CB750 CB550 CB500 CB450 CB400 reflector 33741-340-670

Honda CB Stock Type Reflector ~ Replaces 33741-340-670

$21.46 USD
11-2303
Restore your mid-'70s Honda's stock reflectors with this Stock-Type Screw-On Reflector with a 6mm thread, replacing OEM #33741-340-670. Broad fitment covering the 1972-78 CB750...
Honda CB750 CB550 CB500 CB450 CL450K5 fork internal circlip set 94521-48000

Honda CB Fork Internal Circlip Set

$7.95 USD
73-1035
Replace your fork internal circlips with this Fork Internal Circlip (48mm) Set of 2, replacing OEM #94521-48000.Key Features• Fork internal circlips• 48mm• Set of...
Honda CB750 CB550 front reflector rubber base 33743-341-670

Honda CB Stock Type Front Reflector Rubber Base ~ Replaces 33743-341-670

$8.95 USD
11-2304
Fit the rubber base beneath your stock front reflector with this Stock-Type Front Reflector Rubber Base, replacing OEM #33743-341-670.Key Features• Stock-type front reflector rubber...
Honda CB750 CB550 CB500 CB450 CL450K5 fork gaiters 51611-300-000

Honda CB Fork Gaitors ~ Replaces 51611-300-000

$29.95 USD
27-1089
Replace your fork gaitors with this Black Fork Gaitors Set of 2, replacing OEM #51611-300-000.Note: these are about 1.75" shorter than the stock type...
Honda CB500K CB450K CL450K5 front fork tube cap bolt with o-ring 90123-323-010

1971-74 Honda CB500K / CB450K / CL450K5 Front Fork Tube Cap Bolt with O-Ring ~ Replaces Honda OEM 90123-323-010

$23.85 USD
29-6019
Replace a damaged, rusted, or rounded front fork tube cap bolt on the Honda CB500K, CB450K, and supported CL450K applications listed below. This aftermarket...
Honda CB750 CB550 CB500 fork boot collars joker machine

Honda CB750 / CB550 / CB500 Fork Boot Collars ~ Joker Machine

$99.95 USD
12-0072
Get a café look while keeping your OEM fork gaiters with these Joker Machine Custom Fully CNC Machined Fork Boot Collars, set of 2....
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1972 Honda CB500K · Fork Tubes, Springs, Seals & Boots Buying guide

Match the fork part to the sealing or mounting position

A top bolt’s included O-ring seals a different location from the fork seal set. Boots cover the exterior, and screw-on reflectors use their own threaded mounting. Choose the part for the actual worn component on the installed fork.

Parts to consider

Honda CB750 / CB650 / CB550 / CB500 Fork Seals 35 × 48mm fork seal setFork seals made in Japan, with the stated 35 × 48 × 10.5/11mm dimensions. The detailed fitment names the 1972 CB500K1; check the installed forks before ordering.View part 1971-74 Honda CB500K / CB450K / CL450K5 Front Fork Tube Cap Bolt with O-Ring ~ Replaces Honda OEM 90123-323-010 Top fork bolt including O-ringIndividually sold tube-cap bolt referencing 90123-323-010, with O-ring included. The exact listed application includes CB500K1 1972.View part Honda CB Stock Type Fork Gaitors ~ Replaces 51611-300-000 Black stock-type gaiter setPair of stock-type accordion fork boots referencing 51611-300-000. Check the upper and lower attachment arrangement, particularly if the headlight mounts have been changed.View part

Related parts: 6mm screw-on reflector

The O-ring supplied with a top bolt is not a fork seal

The aftermarket cap bolt referencing 90123-323-010 includes its O-ring and expressly names CB500K1 1972. It is sold individually. The seal set has a different size specification and installation position, so a top-bolt purchase should not be read as a fork seal or full fork rebuild package.

Choose boot length and reflector attachment separately

The featured stock-type boots come as two pieces. Another gaiter pair in the range is described as approximately 1.75 inches shorter. The screw-on reflector uses a 6mm thread and reference 33741-340-670. Compare the fitted boots and reflector mounts independently rather than combining their shared fork location into one assumed kit.

Choosing the right parts

What is the full replacement fork-seal specification?

The set supplies two Japanese-made seals at 35 × 48 × 10.5/11mm and lists the 1972 CB500K. Match the complete seal profile after a fork change rather than choosing from tube diameter alone.

How do the stock-type and shorter gaiter pairs compare?

Both black pairs replace 51611-300-000 and supply two gaiters. The alternate pair is approximately 1.75 inches shorter than stock; choose the stock-type pair when preserving the original boot length and appearance is the aim.

Are both top bolts supplied in one order?

One 90123-323-010 cap bolt with its O-ring is included per order; both fork tops require two. The separately listed 48mm internal circlips come as a pair, so their package quantity is different.

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