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1973 Honda CB350F0 Front Master Cylinder Parts

Identify the master cylinder on your 1973 CB350F0 before deciding between a rebuild kit, reservoir repair or complete replacement. Original-type parts and universal assemblies share this category, but their internal components, levers and fittings should not be treated as interchangeable.

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Currently viewing Master Cylinder & Rebuild Parts

Honda motorcycle 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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1973 Honda CB350F0 · Front Master Cylinder Buying guide

Repair the master cylinder you actually have

An original-type rebuild kit, a 14 mm replacement assembly and a round cap with diaphragm address different faults. Match each to the fitted unit and inspect the hydraulic bore before deciding which purchase makes sense.

Parts to consider

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-377-305 Master-cylinder rebuild kitJapanese-made rebuild kit for the original-type front master cylinder, reference 45530-377-305.View part Honda CB Front Master Cylinder Assembly ~ 14mm 14 mm master-cylinder assemblyBlack body with silver lever and a 14 mm piston. Match the installed brake system before choosing a replacement.View part Honda CB Master Cylinder Reservoir Cap ~ Replaces 43513-MJ6-006 Reservoir cap with diaphragmRound thread-on reservoir cap supplied with its rubber diaphragm.View part

Related parts: Separate reservoir diaphragm

A rebuild depends on the body

The Japanese-made kit replaces reference 45530-377-305 for the original-type front master cylinder. A worn or damaged body can need more than new internal parts. Have its condition assessed before ordering, and do not assume this kit serves a later universal or custom assembly.

Treat bore size as a system choice

The featured replacement has a 14 mm piston; other assemblies in the category use different bores and fittings. Select a master cylinder to suit the brake system rather than expecting a bigger bore to be an automatic improvement. Check the lever, hose connection and brake-light arrangement together.

Common questions

Should I buy a rebuild kit or a complete master cylinder?

That depends on the body’s condition and the assembly fitted. An original-type kit suits a rebuildable matching unit; damaged bores or incompatible aftermarket internals can require a different repair.

Does the round replacement cap include a diaphragm?

Yes. The featured thread-on cap comes with a diaphragm. A separate diaphragm is also linked if the existing matching cap remains serviceable.

Can I choose a 5/8-inch master cylinder instead of a 14 mm one?

Only after checking suitability for the fitted brake system. Bore size changes the hydraulic relationship and lever feel; do not select a different bore solely from a general claim of improved braking.

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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