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1975 Honda CB550F Front Master Cylinder Parts

Service the front brake master cylinder on your 1975 Honda CB550F with rebuild parts or a replacement assembly. Identify the unit already fitted, compare its bore and hose connection, and check reservoir cap contents before choosing parts for a stock or changed setup.

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Currently viewing Master Cylinder & Rebuild Parts

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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 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 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,...
Sold out
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...
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 CB550F · Front master cylinder parts Buying guide

Identify the master cylinder before choosing its parts

Rebuild kits, reservoir caps and replacement assemblies are not interchangeable by appearance alone. Match the existing cylinder and connections; distinguish a cap supplied with a diaphragm from a cap supplied with a plastic O-ring.

Parts to consider

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-377-305 Front master cylinder rebuild kitMade in Japan, with 1975–76 CB550F application. Replaces reference 45530-377-305.View part Honda CB Front Master Cylinder Assembly ~ 14mm 14 mm front master cylinder assemblyBlack body and silver lever, with a 14 mm piston. Match the bore and connections to your installed front brake.View part Honda CB Master Cylinder Reservoir Cap ~ Replaces 43513-MJ6-006 Reservoir cap with diaphragmRound thread-on cap supplied with a diaphragm. Cap reference 43513-MJ6-006; diaphragm reference 45520-300-000.View part

Related parts: Separate reservoir diaphragm · Brake hose junction rubber boot

Choose an internal repair or a complete assembly

The rebuild kit replaces reference 45530-377-305 and is listed for this model year. Inspect the original bore and body before rebuilding. A replacement assembly offers a different purchasing choice: compare its stated piston size, hose outlet, lever layout and brake-light arrangement with the actual front brake before selecting it.

Check the reservoir and hose-junction seals

The featured round reservoir cap includes a diaphragm. If the existing cap is reusable, the linked separate diaphragm replaces reference 45520-300-000. The other linked item is the rubber boot at the brake hose and master cylinder junction. Inspect these separate locations before choosing the seals needed for your repair.

Front Master Cylinder Parts FAQs

Will the rebuild kit fit an aftermarket master cylinder?

The kit is listed for the original-style 1975–76 CB550F application and reference 45530-377-305. An aftermarket cylinder can use different internal parts. Identify its manufacturer, model and bore, then confirm the correct rebuild kit for that specific assembly.

Is the 14 mm assembly the same as the 5/8-inch option?

No. Those are different stated piston sizes. Choose according to the installed brake system and the assembly specifications, rather than treating similar black bodies and silver levers as proof of equivalent hydraulic operation.

Which cap includes the reservoir diaphragm?

The featured round thread-on cap includes a diaphragm, replacing cap reference 43513-MJ6-006 and diaphragm reference 45520-300-000. The other reproduction cap with reference 45513-341-771 is supplied with a plastic O-ring. Compare the contents before ordering.

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