1978 Honda CB750A Caliper Repair & Assemblies

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Currently viewing Brake Caliper Rebuild Kits, Caliper Pistons, Bleed Screws

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Honda CB750 CB550 front brake caliper bleed screw rubber cap 45110-300-003

Honda CB Front Brake Caliper Bleed Screw Rubber Cap (Stock Type) ~ Replaces 45110-300-003

$3.95 USD

Replace your front caliper bleed screw rubber cap with this Stock Type Front Brake Caliper Bleed Screw Rubber Cap, the same design as the...

Honda CB900 CB750 CB650 front caliper piston sealing ring 45215-533-004

Honda CB900 / CB750 / CB650 Front Caliper Piston Sealing Ring ~ Replaces 45215-533-004

$5.80 USD

Replace your front caliper piston sealing ring with this Front Brake Caliper Piston Sealing Ring, replacing OEM #45215-533-004.Key Features• Front brake caliper piston sealing...

Honda CB750 CB550 CB500 CB450 front caliper adjuster set 45117-341-700

Honda CB750 / CB550 / CB500 / CB450 Front Caliper Adjuster Set ~ Replaces 45117-341-700

$13.95 USD

Restore your front caliper adjuster with this Front Brake Caliper Adjuster Set, including adjusting bolt, spring, washer, and nut. Replaces OEM #45117-341-700 (bolt), #45119-300-020...

1975-78 Honda CB750A / CB750F / CB750K Front Caliper Rebuild Kit

$52.87 USD

Rebuild your late-'70s CB750 front caliper with this Front Brake Caliper Rebuild Kit. Includes the brake caliper sealing ring, 2 caliper bolts with washers,...

Honda CB750 CB550 CB500 front brake caliper bleed screw 45224-579-013

Honda CB Front Brake Caliper Bleed Screw ~ Replaces 45224-579-013

$8.95 USD

Replace your front caliper bleed screw with this Front Brake Caliper Bleed Screw, replacing OEM #45224-579-013.Key Features• Front brake caliper bleed screw• Replaces OEM...

Honda CB750A CB750F CB750K front brake caliper assembly 45100-392-003

1975-78 Honda CB750A / CB750F / CB750K Front Brake Caliper Assembly ~ Replaces Honda OEM 45100-392-003

$129.95 USD

Aftermarket front brake caliper assembly for Honda CB750A, CB750F, and CB750K front disc brake service. This complete assembly replaces Honda OEM #45100-392-003 and is...

Honda CB1100 CB1000 caliper bleed cap (pk 10) 45108-425-003

Honda CB Caliper Bleed Screw Rubber Cap (Pk/10) ~ Replaces 45108-425-003

$11.95 USD

Stock up on caliper bleed screw rubber caps with this Brake Caliper Bleed Screw Rubber Cap 10-pack. Universal type for series 1, 3, 4,...

Honda CB750A CB750F CB750K front caliper piston 45107-392-003

1975-78 Honda CB750A / CB750F / CB750K Front Caliper Piston ~ Replaces 45107-392-003

$69.95 USD

Replace your late SOHC CB750 front caliper piston with this Front Brake Caliper Piston, 42.8mm diameter x 34mm length, replacing OEM #45107-392-003.Key Features• Front...

Honda CB750 CB550 front brake caliper bolt and washer set 90165-323-000

Honda CB Front Brake Caliper Bolt & Washer Set ~ Replaces 90165-323-000

$12.50 USD

Replace your front caliper bolts and washers with this Front Brake Caliper Bolt & Washer Set. Includes 2 bolts and 2 washers. Replaces OEM...

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1978 Honda CB750A · Brake Caliper Rebuild Kits, Caliper Pistons, Bleed Screws Buying guide

Choose repair parts or an assembly after checking the caliper

Have the fitted caliper assessed before deciding between individual parts and an aftermarket assembly. Keep its identity and the removed components available while comparing replacement dimensions and package contents.

Parts to consider

1975-78 Honda CB750A / CB750F / CB750K Front Caliper Rebuild Kit

Caliper sealing and hardware kitLists a sealing ring, two bolts with washers, bleed screw and cap, plus adjuster bolt, spring, washer and nut. A piston is not listed as contents.View part

1975-78 Honda CB750A / CB750F / CB750K Front Caliper Piston ~ Replaces 45107-392-003

Individual front caliper pistonThe separate piston listing gives 42.8mm diameter, 34mm length and reference 45107-392-003. Compare all three with the part being replaced.View part

1975-78 Honda CB750A / CB750F / CB750K Front Brake Caliper Assembly ~ Replaces Honda OEM 45100-392-003

Aftermarket front caliper assemblyReplacement reference 45100-392-003. Lists both body halves, pads, piston, seal, bleed screw, cap and bolts; check the application notes before ordering.View part

Avoid duplicating the kit hardware

Mark each required repair part against the kit inventory before adding individual bleed, fastening or adjustment components. The separate piston belongs on the order only if the inspected repair needs it.

Arrange the application check before installation

The assembly description calls for inspection and installation by a qualified mechanic and a test before use. Have the fitted caliper style, mounting and retained parts checked as part of that work; the product title alone does not settle the complete repair plan.

Common questions

Is the piston included in the repair kit?

The repair kit inventory does not list a piston. It names the sealing ring, caliper bolts with washers, bleed screw and cap, and an adjuster set. The piston is available separately, while the aftermarket assembly lists one in its own contents.

What mounting dimension does the assembly ask me to check?

The assembly listing asks customers to confirm 51mm mounting spacing and the stated later single-front-disc caliper style. Compare the actual assembly fitted to the motorcycle. If it differs, ask for fitment help before assuming the replacement matches.

Does the assembly settle the round spacer requirement?

Its buyer note specifically asks 1977–78 CB750A owners to confirm whether the original round spacer between the stationary pad and caliper body needs reuse. Resolve that detail before ordering rather than assuming the assembly’s itemized contents include a new spacer.

Not sure which part you need?

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

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