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1970 Honda CB450K Fork Seals, Gaiters & Caps

Identify the fork fitted to your 1970 CB450K before ordering seals, gaiters or top bolts. Seal dimensions and cap thread are stated, while the two gaiter listings differ in described length. Compare the components removed and count retaining and covering parts needed for service.

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Currently viewing Fork Tubes, Springs, Seals & Boots

Honda motorcycle parts

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

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 CB500 CB450 CL450K5 fork cover rubber set 51601-300-000

Honda CB Fork Cover Rubber Set ~ Replaces 51601-300-000

$29.95 USD
73-0836
Replace your fork cover rubbers with this Fork Cover Rubber Set of 2, replacing OEM #51601-300-000.Key Features• Fork cover rubbers• Set of 2• Replaces...
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 CB450 CB350 CL350K4 fork spacer trim set 51608-300-000

Honda CB Fork Spacer Trim Set ~ Replaces 51608-300-000

$37.95 USD
27-1112
Restore your chrome fork boot tops with this Chrome Front Fork Spacer Trim Set of 2. These are the chrome ribs that cover the...
Honda CB750 CB450 CL450K0 CL450K2 CL450K3 fork seals 91255-292-003

Honda CB Fork Seals ~ Replaces 91255-292-003

$22.95 USD
27-1077
Replace your earliest CB750K or CB450 fork seals with this Fork Seal Set, 35 x 46 x 11mm, replacing OEM #91255-292-003. Made in Japan...
Honda CB750K CB450K fork seal backup rings (pk 2) 51452-319-010

1970-72 Honda CB750K / CB450K Fork Seal Backup Rings (Pk/2) ~ Replaces 51452-319-010

$9.95 USD
73-1037
Replace your fork seal backup rings with this Fork Seal Backup Rings Pk/2, replacing OEM #51452-319-010. These rings go above the fork seals.Key Features•...
Honda CB750 CB550 CB500 CB450 35mm front fork tube bolt with o-ring 90123-300-000

Honda CB750 / CB550 / CB500 / CB450 35mm Front Fork Tube Bolt with O-Ring ~ Replaces Honda OEM 90123-300-000

$17.95 USD
29-6013
This aftermarket 35mm front fork tube bolt is used as the top cap/bolt on compatible Honda CB 35mm fork tubes. It replaces Honda OEM...
Honda CB750K CB450K fork internal circlip set 94521-50000

1970-72 Honda CB750K / CB450K Fork Internal Circlip Set

$7.95 USD
73-1036
Replace your fork internal circlips with this Fork Internal Circlip (50mm) Set of 2, replacing OEM #94521-50000.Key Features• Fork internal circlips• 50mm• Set of...
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...
Universal motorcycle fork cap wrench 35mm

Universal Motorcycle Fork Cap Wrench ~ 35mm

$7.00 USD
35-9113
Fork Cap Wrench ~ 35MM Size for custom or restoration work on classic Honda CB motorcycles.  Key Features Aftermarket part Sold as: Each Fitment...
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1970 Honda CB450K · Fork Tubes, Springs, Seals & Boots Buying guide

Compare sealing, covering and retaining pieces individually

Fork seals measure 35 × 46 × 11mm, and the top bolt specifies M28 × 1.5 with an O-ring included. Backup rings and internal circlips are separate two-piece products. Gaiter length needs its own check against the fitted fork.

Parts to consider

Honda CB Fork Seals ~ Replaces 91255-292-003 35 × 46 × 11mm seal setFork seals referencing 91255-292-003, made in Japan by an OEM supplier. Confirm supplied set quantity and match the seal removed from the fitted fork.View part Honda CB Stock Type Fork Gaitors ~ Replaces 51611-300-000 Stock-type black gaiters, set of twoTwo black stock-type gaiters replacing 51611-300-000. Compare the fitted fork and covering arrangement before ordering.View part Honda CB750 / CB550 / CB500 / CB450 35mm Front Fork Tube Bolt with O-Ring ~ Replaces Honda OEM 90123-300-000 Individual top bolt with O-ring35mm fork application, M28 × 1.5 thread, replacing 90123-300-000. Sold each with O-ring included; compare thread and application, then choose quantity required.View part

Related parts: Backup rings above fork seals, pack of two · 50mm internal circlips, set of two · Alternative gaiters described as about 1.75 inches shorter

Check the retaining pieces during seal service

The backup rings replace 51452-319-010 and are described as fitting above the seals, with two supplied. The 50mm internal circlips instead replace 94521-50000 and also supply two. Compare both removed components separately; the seal listing does not establish those retaining parts included.

Use the gaiter length qualification when comparing the options

Both gaiter products reference 51611-300-000 and supply two, but the alternative listing says it is about 1.75 inches shorter than the stock type. Compare the required covering arrangement and available length on the fitted fork rather than treating the shared reference as identical product dimensions.

CB450K buying questions

Are the two gaiter listings described as the same length?

The stock-type set and alternative share reference 51611-300-000, but the alternative is expressly described as about 1.75 inches shorter. Compare the installed covering arrangement and length needed before choosing; the common reference does not make their stated dimensions identical.

Does the seal set include backup rings and internal circlips?

Those components have separate listings: two backup rings referencing 51452-319-010 and two 50mm circlips referencing 94521-50000. Their inclusion with the seal set is not stated. Inspect the removed retaining parts and choose any needed purchases separately.

How do fork-cap packages differ in supply and seals?

The single 90123-300-000 replacement cap is sold each with an O-ring. The black Joker Machine set supplies two caps with O-rings included. Compare each family’s own application and contents; the single cap’s thread specification does not verify another cap product.

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