VintageCB750 Supplying CB Riders Since 2010

About Us Why Us? Reviews Shipping Info Returns Contact Us
Wish Lists
0 My Cart

Your cart is currently empty.

Browse all parts
Total (USD): $0.00
View cart
Menu
Search
Wish
Cart 0
My motorcycle Choose your Honda CB model

Search parts

Searching all Honda CB parts

Example: brake pads or oil filter.

1978 Honda CB550K Fork Boots, Seals and Spring Parts

List the fork pieces needed individually rather than assuming a seal set covers the whole assembly. Dust boots, oil seals and metal retaining rings are separate purchases here. Springs and an internal Honda oil-lock piece also require their own application checks against the fitted fork.

Close ×
Your saved bike Choose your Honda CB model

Shop By Category

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 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 fork dust boot set

1975-78 Honda CB750 / CB550 Fork Dust Boot Set

$24.95 USD
27-1080
Replace your 35mm fork dust boots with this Fork Seal Dust Boot Set of 2 for 35mm fork tubes.Key Features• Fork dust boot set,...
New
Honda CB750 CB550 CB500 CB400 headlight stay headlight reflector bolt 90120-377-000

Honda CB750 / CB550 / CB500 / CB400 Headlight Stay / Headlight Reflector Bolt ~ Replaces 90120-377-000

$8.95 USD
99-4977
Upgrade or restore your classic Honda motorcycle headlight system with this Headlight Stay / Headlight Reflector Bolt — designed to secure the headlight reflector...
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 CB750A CB550F CB550K Progressive type front fork springs

1974-78 Honda CB750A / CB550F / CB550K Progressive Type Front Fork Springs

$84.95 USD
33-0005
Upgrade your fork performance with this Progressive Type Front Fork Spring Set of 2, including 10" pipe and washers. Progressive springs improve handling and...
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...
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...
View details
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...
compare

1978 Honda CB550K · Fork Tubes, Springs, Seals & Boots Buying guide

Check the sealing pieces and spring application independently

The external boot, oil seal and retaining ring have distinct contents. Compare the old parts and stated seal dimensions first, then read the spring application note before assuming its packaged pipe or washers should be used.

Parts to consider

Honda CB750 / CB650 / CB550 / CB500 Fork Seals Replacement fork oil sealsSeal set with listed dimensions of 35 × 48 × 10.5/11 mm. Compare the old seal and fitted fork application rather than choosing only by tube diameter.View part 1975-78 Honda CB750 / CB550 Fork Dust Boot Set Two 35 mm fork dust bootsDust-boot pair for the listed 35 mm fork-tube application. Oil seals and retaining rings are separate products, so check their condition independently.View part Honda CB750 / CB650 / CB550 / CB500 Fork Seal Stopper Metal Rings (Pk/2) ~ Replaces 51447-KL4-951 Fork-seal stopper ring pairTwo metal rings identified as sitting above the fork seals, referencing 51447-KL4-951. Compare the retained rings with the listed pattern.View part

Related parts: Fork spring pair with application notes · Honda internal fork oil-lock piece · Individual fork cap with O-ring

Do not combine separate sealing packages by assumption

The dust boots are a pair, and the stopper-ring package contains two metal rings. The oil-seal product has its own dimensional specification. Identify each piece needed for the fork repair and check the product contents rather than assuming a boot, seal or ring purchase contains the other parts.

Read the spring note before considering its loose extras

The spring kit includes two springs, pipe and washers, but its CB550K/F note says the spacers and washers are not used. Consult the linked product instructions for the application. That note does not make other internal fork parts interchangeable merely because the tube diameter matches.

Common questions

Are the stopper rings the same parts as the fork seals?

They are separate metal rings identified as sitting above the fork seals. The ring package contains two, while the oil-seal set and dust-boot pair have their own listings and should be selected independently.

Should the spring kit’s pipe and washers be used here?

The product expressly states that its spacers and washers are not used on CB550K/F. Follow that application note and consult the linked instructions rather than planning to install every piece shown in the spring package.

Does the replacement fork cap include its O-ring?

The individual replacement cap description includes the O-ring and lists M28 × 1.5 threads. Compare the fitted cap, fork application and reference before ordering; its 35 mm fork application does not determine the cap wrench hex.

Not sure which part you need?

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

Ask a fitment question
Parts categories for 1978 Honda CB550K

Your cart

×