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1977 Honda CB750K Fork Tubes, Seals & Boots

Choose seals, dust boots, tubes or springs for the forks fitted to your 1977 Honda CB750K. The replacement tube listings restrict the 1977 application by frame number, while seal and boot sets have their own dimensions. Check the installed forks and the exact product details before ordering.

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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 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 Progressive type front fork springs

Honda CB750 Progressive Type Front Fork Springs

$89.95 USD
27-1078
Upgrade your CB750 front suspension with this Progressive Type Front Fork Spring Set of 2, including required spacers and washers. Progressive springs improve handling...
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 CB750A CB750F CB750K fork tube set

1972-78 Honda CB750A / CB750F / CB750K Fork Tube Set

$179.95 USD
73-1148
Replace your fork tubes with this Fork Tube Set of 2 for the late-1970s CB750 models.Before ordering please confirm this is the length you...
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,...
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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 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...
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
99-5383
This genuine Honda 16mm lock nut is used on compatible Honda CB clutch basket and oil filter rotor assemblies. It is a small hardware...
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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Honda CB750A CB750F CB750K fork tube set

1972-78 Honda CB750A / CB750F / CB750K Fork Tube Set

$179.95 USD
73-1080
Replace your fork tubes with this Fork Tube Set of 2, length 605mm (23 13/16") with 35mm OD.Note: this length is 23 13/16", one...
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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1977 Honda CB750K · Fork Tubes, Springs, Seals & Boots Buying guide

Identify the fork assembly before choosing tubes and seals

Fork tubes, oil seals, outer dust boots and spring sets are separate purchases. The 1977 frame boundary needs particular care when comparing the two tube options; neither tube diameter nor the model year resolves every fitment detail.

Parts to consider

Honda CB750 / CB650 / CB550 / CB500 Fork Seals 35 × 48mm fork seal setOil seal set listed at 35 × 48 × 10.5 / 11mm and made in Japan.View part 1972-78 Honda CB750A / CB750F / CB750K Fork Tube Set Later-application fork tube pairTwo replacement tubes, part 73-1148, listed for 1977 frames 2707508 and higher. The description does not state a tube length.View part 1975-78 Honda CB750 / CB550 Fork Dust Boot Set 35mm fork dust boot pairTwo outer dust boots listed for 35mm fork tubes and the 1977–78 CB750K application.View part

Related parts: Spring pair with spacers and washers · Two stopper rings, reference 51447-KL4-951 · Genuine Honda oil lock piece 51432-371-003

Keep internal fork parts tied to the fitted assembly

The genuine Honda oil lock piece is sold individually as 51432-371-003. Compare that reference and its location in the fitted fork diagram before adding it to a rebuild; the broad model application does not identify every internal component in an exchanged fork.

Build the seal and spring order from separate contents

The spring pair includes spacers and washers, while the two stopper rings replace 51447-KL4-951. Check those supplied pieces against the repair before duplicating hardware. Oil seals and outer dust boots remain separate purchases.

Questions before you order

What should I confirm at frame number 2707508?

Tube set 73-1148 says 2707508 and higher, whereas the 605 mm set, part 73-1080, says higher than 2707508. Have the seller confirm the exact boundary against the installed forks before ordering at that number; the descriptions are not identical.

Does the 605 mm tube listing establish the original 1977 length?

No. Its one-inch-longer-than-stock note is attached to the stated 1972–76 applications. The 1977 line instead says to confirm the required length, and tube set 73-1148 gives no length. Measure and identify the fitted tubes rather than transferring the earlier-model note to the 1977 bike.

Can damper valves be fitted without modifying the forks?

The separate damper valve listing requires damper-rod drilling and notes that some models may need a spacer. It is a modification for the stated 35mm rod-style forks, not an ordinary seal replacement. Check the instructions and fitted fork arrangement first.

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