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1983 Honda CB1000C Master Cylinder Rebuild Parts

Both ends of the 1983 Honda CB1000C use a hydraulic master cylinder, and this category covers the two: a front kit, a rear kit, diaphragms for each, two reservoir cap styles, a cap O-ring and the rubber boot, plus a universal Magura unit without fitment.

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Currently viewing Master Cylinder & Rebuild Parts

Honda motorcycle parts

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Honda CB750F CB750C CB700SC front master cylinder kit 45530-MA5-671

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-MA5-671

$24.95 USD
08-0209
Refresh your DOHC CB's front master cylinder with this Front Master Cylinder Rebuild Kit, replacing OEM #45530-MA5-671. Fits the 1981-82 CB750F/C, CB750SC/CB700SC Nighthawk, CB900F/CB900C,...
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 CB750F CB900 CB1000C rear master cylinder kit 43520-461-771

Honda CB Rear Master Cylinder Rebuild Kit ~ Replaces 43520-461-771

$37.95 USD
08-0212
Rebuild your DOHC CB's rear master cylinder with this Rear Master Cylinder Rebuild Kit, replacing OEM #43520-461-771. Fits the 1981-82 CB750F Supersport, CB900 family,...
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 rubber boot 45522-422-000

Honda CB Master Cylinder Rubber Boot ~ Replaces 45522-422-000

$8.95 USD
73-0094
Replace your master cylinder rubber boot with this Master Cylinder Rubber Boot, replacing OEM #45522-422-000.Key Features• Master cylinder rubber boot• Replaces OEM #45522-422-000• Honda...
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...
Honda CB750 CB700SC CB650 master cylinder diaphragm 45520-MA5-671

Honda CB Front Master Cylinder Reservoir Diaphragm ~ Replaces 45520-MA5-671

$11.50 USD
08-0284
Replace the diaphragm on your later DOHC CB's front master cylinder reservoir with this Front Master Cylinder Reservoir Diaphragm, replacing OEM #45520-MA5-671 / #45520-MA5-672...
Magura universal front master cylinder assembly 16mm

Magura Universal Front Master Cylinder Assembly ~ 16mm

$259.00 USD
08-0251
Step up to dual-disk compatibility with this Magura Universal Front Brake Master Cylinder, featuring a 16mm piston diameter recommended for dual-disk brake systems. Threaded...
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 CB1000C CB900C rear brake light switch spring 35357-MA2-610

1980-83 Honda CB1000C / CB900C Rear Brake Light Switch Spring ~ Replaces 35357-MA2-610

$8.19 $7.87 USD
You save $0.32
73-0849
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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1983 Honda CB1000C · Master Cylinder Buying guide

Match the reservoir and the hydraulic assembly

Front and rear master-cylinder internals and diaphragms are separate selections on the CB1000C. Check the assembly fitted and the damaged area before ordering: a reservoir diaphragm, an external boot and an internal piston/seal kit do different jobs.

Master cylinder parts to consider

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-MA5-671 Front master cylinder kitFront brake kit referencing 45530-MA5-671, with explicit 1983 CB1000C fitment.View part Honda CB Rear Master Cylinder Rebuild Kit ~ Replaces 43520-461-771 Rear master cylinder kitRear brake kit referencing 43520-461-771, with explicit 1983 CB1000C fitment.View part Honda CB Front Master Cylinder Reservoir Diaphragm ~ Replaces 45520-MA5-671 Front reservoir diaphragmFront diaphragm 08-0284 lists reference 45520-MA5-671 and the CB1000C application.View part

Related parts: Rear reservoir diaphragm · Reservoir cap with diaphragm · Master cylinder rubber boot

Keep the front and rear diaphragms distinct

Diaphragm 08-0284 is listed for the CB1000C front reservoir. The separate 08-0282 diaphragm, reference 45520-300-000, is listed for its rear reservoir even though it serves front reservoirs on older Hondas. Match the specific reservoir rather than copying another model’s installation position.

Compare the cap contents

The round thread-on cap 29-0080 includes a diaphragm. Reproduction cap 29-0054 instead lists a plastic O-ring; do not assume the two packages contain the same seals. Compare the fitted reservoir, cap reference and reusable sealing parts before choosing a cap or buying extra seals.

Master cylinder questions

Will a new rubber boot stop a hydraulic leak at the master cylinder?

The listed boot shields the actuating end from water and debris; it is not the internal hydraulic seal. Fluid leakage calls for inspection of the piston, seals and bore. Select the correct front or rear repair parts after the cause is identified, and bleed an opened hydraulic circuit.

Can the universal Magura unit be selected just because the bike has dual discs?

No. The listing recommends its 16mm piston for dual-disc systems but does not establish CB1000C-specific conversion fitment. It also excludes the brake-light switch and banjo hardware and has no mirror mount. Confirm hydraulic suitability, mounting, hose connection and switch requirements before a conversion.

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