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1978 Honda CB750F Fork Tubes, Seals & Supersport Boots

Keep tube replacement, fork sealing and spring changes as separate decisions for the 1978 Honda CB750F. The listings give a 605 mm tube set with a required-length check, oil-seal dimensions and dedicated Supersport dust boots; spring and internal pieces have their own contents.

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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...
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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 CB750F fork dust boot set

1977-78 Honda CB750F Fork Dust Boot Set

$23.45 USD
27-1081
Replace your late-'70s CB750F Supersport fork dust boots with this Fork Seal Dust Boot Set of 2 for 35mm fork tubes.Key Features• Fork dust...
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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1978 Honda CB750F · Fork Tubes & Seals Buying guide

Choosing fork tubes, seals and internal parts

Plan tube replacement, sealing and spring changes around the fork assembly actually fitted. The selected parts cover different jobs: replacement tubes, oil seals, Supersport dust boots and separately offered internal components.

Fork parts to consider

1972-78 Honda CB750A / CB750F / CB750K Fork Tube Set 605 mm fork tube pairSet 73-1080 supplies two tubes with 35 mm outside diameter.View part Honda CB750 / CB650 / CB550 / CB500 Fork Seals Japanese-made fork oil sealsSet 27-1007 lists dimensions of 35 × 48 × 10.5 / 11 mm and includes the 1978 CB750F application.View part 1977-78 Honda CB750F Fork Dust Boot Set Supersport fork dust bootsSet 27-1081 supplies two boots for 35 mm tubes on the 1977–78 CB750F.View part

Related parts: Progressive-type fork spring set · Fork seal retaining rings · Genuine Honda fork oil-lock piece

Retaining rings for the seal order

Pack 73-0940 supplies two metal rings that fit above the fork seals, replacing 51447-KL4-951. Compare the existing rings when deciding which sealing components need replacement.

Identify the internal oil-lock piece

The genuine Honda oil-lock piece is sold individually under reference 51432-371-003. Its application includes the 1977–80 CB750F; match the original piece and the diagram for the fitted fork before adding it to an internal-parts order.

Fork replacement questions

Does the one-inch-longer tube description apply to the 1978 CB750F?

That comparison applies to specified earlier CB750K models. For the 1977–78 CB750F, the listing instead asks you to confirm that 605 mm is the length required. It does not establish a one-inch extension for this Supersport.

Do the progressive fork springs need separately ordered spacers and washers?

Spring set 27-1078 explicitly includes two springs with the required spacers and washers. Account for those supplied pieces before adding duplicate spring-fitting hardware.

Are the optional damper valves a drop-in purchase?

The supplier specifies damper-rod drilling for valve set 27-1886 and recommends installation by a mechanic. Some applications may also need an additional spacer; confirm the requirements for the fitted fork before ordering.

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