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1977 Honda CB750K Master Cylinder Parts

Identify the front master cylinder fitted to your 1977 Honda CB750K before choosing a rebuild kit, reservoir part or complete unit. Original-application kits and several aftermarket assemblies appear here. Bore size, lever compatibility and cap contents are important checks when the controls have been changed.

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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 Master Cylinder & Rebuild Parts

Honda motorcycle parts

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

Honda CB750 CB550 CB500 master cylinder rubber boot 45522-300-010

Honda CB Master Cylinder Rubber Boot ~ Replaces 45522-300-010

$9.95 USD
33-0003
Replace your master cylinder rubber boot with this Master Cylinder Rubber Boot, which attaches where the brake hose joins the master cylinder. Replaces OEM...
New
Honda CB750 CB550 CB400F front master cylinder assembly 5 8 in.

Honda CB Front Master Cylinder Assembly ~ 5/8 in.

$99.95 USD
08-0253
Drop in a factory-look master cylinder with a performance piston size using this Front Brake Master Cylinder Assembly. Black body with silver lever, custom-manufactured...
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Honda CB900 CB750 CB650 front master cylinder assembly

Honda CB900 / CB750 / CB650 Front Master Cylinder Assembly

$109.95 USD
08-0457
Fit a blacked-out front master cylinder to your late-'70s or early-'80s DOHC CB with this Front Brake Master Cylinder Assembly. Usable on any single...
Honda CB750 CB550 CB400F master cylinder diaphragm 45520-300-000

Honda CB Master Cylinder Reservoir Diaphragm ~ Replaces 45520-300-000

$10.95 USD
08-0282
Replace a hardened or torn master cylinder diaphragm with this Master Cylinder Reservoir Diaphragm, replacing OEM #45520-300-000. Exceptional range of applications, fits FRONT master...
Honda CB750 CB550 CB400 front master cylinder kit 45530-404-315

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-404-315

$59.95 USD
08-0281
Service your late-'70s CB750K/A, CB550, or CB400 front master cylinder with this Front Brake Master Cylinder Rebuild Kit, replacing OEM #45530-404-315. Made in Japan.Key...
New
Honda CB750 CB550 CB400F front master cylinder assembly 14mm

Honda CB Front Master Cylinder Assembly ~ 14mm

$99.95 USD
08-0269
Restore strong and consistent braking performance with this Front Brake Master Cylinder Assembly, designed as a high-quality replacement for many classic Honda models. This...
Honda CB1000 CB900 master cylinder reservoir cap plastic o-ring 45521-MJ6-006

Honda CB Master Cylinder Reservoir Cap Plastic O-Ring ~ Replaces 45521-MJ6-006

$4.95 USD
29-0062
Replace your master cylinder cap O-ring with this Master Cylinder Reservoir Cap Plastic O-Ring, replacing OEM #45521-MJ6-006.Key Features• Master cylinder reservoir cap O-ring• Plastic•...
Honda CB1100 CB1000 CB900 master cylinder reservoir cap 45513-341-771

Honda CB Master Cylinder Reservoir Cap ~ Replaces 45513-341-771

$39.95 USD
29-0054
Restore your master cylinder cap with this Master Cylinder Cap with Plastic O-Ring, replacing OEM #45513-341-771. This original style was discontinued long ago by...
Universal Honda-type front master cylinder assembly 13mm

Universal Honda-Type Front Master Cylinder Assembly ~ 13mm

$84.95 USD
08-0262
Upgrade to a universal front master cylinder assembly with this Honda-type unit. Complete with lever, banjo bolt, banjo bolt washers, and brake light switch,...
Honda CB750A CB750K rear brake light switch spring 35357-393-000

1976-78 Honda CB750A / CB750K Rear Brake Light Switch Spring ~ Replaces 35357-393-000

$5.80 USD
73-1006
Replace your rear brake stop switch spring with this Rear Brake Light Stop Switch Spring. This is the spring that attaches to the rear...
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Honda CB750 CB650 CB550 replacement brake lever for master cylinder

Honda CB Replacement Brake Lever for Master Cylinder 08-0262

$9.95 USD
08-0430
Replace the brake lever on the #08-0262 Master Cylinder Assembly specifically with this Brake Lever. Designed for this particular master cylinder.Key Features• Replacement brake...
Honda CB1100 CB1000 CB900 master cylinder reservoir cap 43513-MJ6-006

Honda CB Master Cylinder Reservoir Cap ~ Replaces 43513-MJ6-006

$23.45 USD
29-0080
Replace your master cylinder reservoir cap with this Master Cylinder Reservoir Cap with Diaphragm, round OEM thread-on type. Cap replaces OEM #43513-MJ6-006, diaphragm replaces...
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Honda CB750 replacement brake lever for master cylinder 08-0253

Replacement Brake Lever for Master Cylinder 08-0253

$9.95 USD
08-0029
Replace the brake lever on the #08-0253 Master Cylinder Assembly specifically with this Brake Lever. Designed for this particular master cylinder, not stock brake...
Magura universal front master cylinder assembly 13mm

Magura Universal Front Master Cylinder Assembly ~ 13mm

$259.00 USD
08-0250
Build a custom front brake setup with this Magura Universal Front Brake Master Cylinder. Features a 13mm piston diameter, 12mm stroke, and a threaded...
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1977 Honda CB750K · Master Cylinder & Rebuild Parts Buying guide

Start with the master cylinder already on the handlebar

A kit for the listed later Honda unit is different from a complete replacement cylinder. Reservoir diaphragms and cap O-rings also have separate listings, so use the actual assembly identity to build a clear order.

Parts to consider

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-404-315 1977–78 master cylinder rebuild kitJapanese-made front kit replacing the listed Honda reference 45530-404-315.View part Honda CB Front Master Cylinder Assembly ~ 14mm 14mm front replacement assemblyBlack body with silver lever and a stated 14mm piston; confirm the fitted brake setup.View part Honda CB Master Cylinder Reservoir Cap ~ Replaces 45513-341-771 Reservoir cap with plastic O-ringReproduction cap replacing reference 45513-341-771; the plastic O-ring is included.View part

Related parts: Separate reservoir diaphragm · Individual cap O-ring · Hose-junction rubber boot

Keep internal rebuild parts matched to their assembly

The selected rebuild kit lists the 1977–78 CB750K application. An aftermarket master cylinder may use different internals even when it fits the same motorcycle. Identify its maker or product reference before buying a repair kit; a shared model application does not establish internal interchangeability.

Compare complete units without assuming the same bore

The featured assembly specifies a 14mm piston, while other units in this category have different bore sizes and supplied fittings. Universal options require checks of the complete brake arrangement. Read lever, switch and mirror-mount details individually rather than choosing a cylinder by its appearance alone.

Questions before you order

Can this rebuild kit service every replacement cylinder?

Its stated application is the later listed Honda front master cylinder. Do not assume it fits an aftermarket assembly. Identify the unit on the motorcycle and compare the kit reference before ordering internal parts.

What seal comes with the featured reservoir cap?

That cap includes a plastic O-ring. The diaphragm is separately listed, and another cap option supplies a diaphragm. Compare your cap design and the exact package contents before ordering additional reservoir seals.

Are the replacement brake levers interchangeable?

Some lever listings are dedicated to a specific aftermarket master cylinder. Match that cylinder reference and lever mounting, including the contact arrangement. A lever listed for one replacement unit is not automatically correct for the original Honda assembly.

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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