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1975 Honda CB750K Master Cylinder & Rebuild Parts

Start with the master cylinder fitted to your 1975 CB750K. This category includes stock-type rebuild and reservoir parts alongside replacement and universal assemblies. A cap, diaphragm or internal kit must match that actual cylinder, especially if the handlebar controls have been changed.

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Currently viewing Master Cylinder & Rebuild Parts

Honda motorcycle parts

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

Honda CB750 CB550 CB400F front master cylinder kit 45530-377-305

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-377-305

$37.95 USD
08-0215
Rebuild your early SOHC CB's front master cylinder with this Front Brake Master Cylinder Rebuild Kit, replacing OEM #45530-377-305. Made in Japan. Fits the...
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...
Honda CB750K rear brake light switch spring 35357-300-000

1969-76 Honda CB750K Rear Brake Light Switch Spring ~ Replaces 35357-300-000

$5.95 USD
29-7009
Replace your rear brake stop switch spring with this Rear Brake Light Stop Switch Spring, replacing OEM #35357-300-000.Key Features• Rear brake light stop switch...
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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 CB500 CB400 CB350 master cylinder damper set

Honda CB Master Cylinder Damper Set

$6.95 USD
73-0841
Replace your master cylinder damper with this Master Cylinder Damper Set. Includes brake master cylinder rubber damper, plate, and washer. This set is often...
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 CB750K rear brake light switch bracket 50156-300-020

1969-76 Honda CB750K Rear Brake Light Switch Bracket ~ Replaces 50156-300-020

$13.95 USD
73-0887
Replace your rear brake stop switch bracket with this Rear Brake Light Stop Switch Bracket, replacing OEM #50156-300-020.Key Features• Rear brake light stop switch...
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,...
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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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1975 Honda CB750K · Master Cylinder & Rebuild Parts Buying guide

Identify the cylinder before choosing its repair parts

The rebuild kit, reservoir diaphragm and reproduction cap are separate products. Replacement assemblies elsewhere in this range have their own specifications; parts listed for the original cylinder are not automatically interchangeable with them.

Parts to consider

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-377-305 Front master cylinder rebuild kitJapanese-made rebuild kit listed for the 1975 CB750K, replacing reference 45530-377-305. Check the fitted cylinder first.View part Honda CB Master Cylinder Reservoir Diaphragm ~ Replaces 45520-300-000 Reservoir diaphragmSeparate reservoir diaphragm replacing reference 45520-300-000, listed for the front master cylinder on this model.View part Honda CB Master Cylinder Reservoir Cap ~ Replaces 45513-341-771 Reservoir cap with plastic O-ringReproduction cap supplied with its plastic O-ring, replacing reference 45513-341-771. Compare your reservoir style.View part

Related parts: Master cylinder damper set · Brake hose junction rubber boot

Rebuild the cylinder you actually have

The selected internal kit is listed against reference 45530-377-305 and includes the 1975 CB750K in its application. The description does not identify it as a universal kit. If the cylinder has been replaced, establish its make and specification before using the motorcycle year to choose internal parts.

Reservoir parts have their own contents

The diaphragm is a separate product. The featured reproduction cap includes a plastic O-ring, while the damper set lists a rubber damper, plate and washer. Those are different repair items. Compare each with the fitted assembly and avoid treating the reservoir cap as an internal rebuild kit.

Common questions

Will this rebuild kit fit a universal master cylinder?

The kit lists the stock-type Honda application and reference 45530-377-305. It does not claim compatibility with every universal cylinder in this category. Identify a replacement cylinder by its own specifications before selecting internal parts.

Does the reservoir cap include the diaphragm?

The featured cap lists a plastic O-ring with the cap. The reservoir diaphragm has a separate listing and reference number. Check both components on your cylinder if you are rebuilding the reservoir assembly.

How should I choose a complete replacement assembly?

Compare its stated bore, mounting, lever and brake light switch arrangement with your fitted components. Universal and replacement assemblies require those checks; their presence in a model-filtered category does not establish an unchanged stock installation.

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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