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1976 Honda CB500T Master Cylinder Bore

Decide whether you need cups and a diaphragm or a complete cylinder. The rebuild kit replaces 45530-377-305. Complete cylinders here include a 5/8 inch assembly, a 14mm assembly, and universal 13mm units. Match the bore you measured.

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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,...
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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...
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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1976 Honda CB500T · Master Cylinder & Rebuild Parts Buying guide

Kit for the cylinder you have, or a new bore you measured

Use the kit when the body is sound. Choose 5/8 inch or 14mm only if that is the bore you measured. Treat 13mm Magura and Honda-type cylinders as universal, not as the stock size.

Parts to consider

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-377-305 Rebuild kitReplaces 45530-377-305. Use it to refresh the cylinder you already have. It is not a 14mm or 5/8 inch replacement body.View part Honda CB Front Master Cylinder Assembly ~ 5/8 in. 5/8 inch cylinderA complete front master cylinder stated as 5/8 inch. Buy it only when you measured that bore or you intend to change to it.View part Honda CB Front Master Cylinder Assembly ~ 14mm 14mm cylinderA complete front master cylinder stated as 14mm. It is not the 5/8 inch unit and not the universal 13mm unit.View part

Related parts: Reservoir diaphragm · Rubber boot

Bore is the choice that matters

A 5/8 inch body, a 14mm body, and a 13mm universal body will not feel the same at the lever, and the lever ratio changes with them. Measure the cylinder you have before you replace it. The rebuild kit stays on the original bore because it replaces 45530-377-305 inside the cylinder you keep.

Small pieces people forget

The reservoir diaphragm replaces 45520-300-000. The rubber boot replaces 45522-300-010. Caps are sold under their own Honda numbers, including 45513-341-771. A torn diaphragm is not a reason to buy a new 14mm cylinder.

Master cylinder questions

Does the rebuild kit include a new cylinder?

No. It replaces 45530-377-305 for the cylinder you are rebuilding. A 5/8 inch or 14mm assembly is a different purchase.

Which cylinders are universal?

The Magura assembly and the Honda-type assembly that say 13mm are described as universal. Do not call them the stock 1976 bore unless you measured 13mm.

What if only the diaphragm is split?

Order the diaphragm, 45520-300-000, or the boot, 45522-300-010, if that is the failed rubber. You do not need a new bore for a torn cap seal.

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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