1979 CB750K Master Cylinder & Reservoir

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Honda CB900 / CB750 / CB650 Front Master Cylinder Assembly

$109.95 USD

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 CB900 / CB750 / CB650 / CB400 Master Cylinder Reservoir Rebuild Kit

$74.95 USD

Rebuild your master cylinder reservoir with this Front Master Cylinder Reservoir Rebuild Kit, 4-screw cover type. Includes plastic reservoir, reservoir cap, diaphragm, O-ring, and...

Honda CB1100 CB1000 CB900 master cylinder rubber boot 45522-422-000

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

$8.95 USD

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 CB750 CB900 CB650 master cylinder diaphragm 45520-422-026

Honda CB Front Master Cylinder Reservoir Diaphragm ~ Replaces 45520-422-026

$11.50 USD

Replace the diaphragm on your early DOHC CB's front master cylinder reservoir with this Front Master Cylinder Reservoir Diaphragm, replacing OEM #45520-422-026 / #45520-422-006...

Honda CB750 CB650 CB400T front master cylinder kit 45530-442-315

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-442-315

$49.95 USD

Rebuild your early DOHC CB's front master cylinder with this Front Master Cylinder Rebuild Kit, replacing OEM #45530-442-315. Fits the 1979-80 DOHC CB750K/L/C, CB650/CB650C,...

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Honda CB750C CB750K rear brake light switch spring 35357-ME1-670

1979-83 Honda CB750 Rear Brake Light Switch Spring ~ Replaces 35357-ME1-670

$8.19 $7.87 USD

You save $0.32

Replace your rear brake stop switch spring with this Rear Brake Light Stop Switch Spring. This is the spring that attaches to the rear...

Replacement Brake Lever for Master Cylinder 08-0457

$9.95 USD

Replace the brake lever specifically on the #08-0457 Master Cylinder (sold separately) with this Brake Lever.Important: this lever is ONLY for Master Cylinder #08-0457,...

Magura Universal Front Master Cylinder Assembly ~ 16mm

$259.00 USD

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...

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Honda CB750 CB650 rear brake light switch 35350-MG7-405

1979-82 Honda CB750 / CB650 Rear Brake Light Switch ~ Replaces 35350-MG7-405

$15.82 USD

Restore reliable brake light activation with this Rear Stop Light Switch, designed as a direct replacement for several original Honda rear brake switches. This...

Honda CB900 CB750 CB650 CB400 chrome master cylinder cover 45513-422-671

Honda CB900 / CB750 / CB650 / CB400 Chrome Master Cylinder Cover ~ Replaces 45513-422-671

$16.95 USD

Add chrome to your master cylinder with this Chrome Master Cylinder Cover, 4-screw type, replacing OEM #45513-422-671 / #45519-422-671.Key Features• Chrome master cylinder cover•...

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1979 Honda CB750K · Master Cylinder & Rebuild Parts Buying guide

Choose a master-cylinder repair or replacement

The internal repair kit, four-screw reservoir kit and complete aftermarket assembly cover different work. Identify the unit fitted before deciding which approach suits the repair.

Parts to consider

Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-442-315

Front Master Cylinder Rebuild KitInternal kit replacing reference 45530-442-315, listed for the 1979–80 CB750K.View part

Four-Screw Reservoir Rebuild KitPlastic reservoir, cap, diaphragm, O-ring and screws for the four-screw cover type.View part

Replacement Front Master CylinderBlack body and lever with a listed 15.8 mm piston and integrated brake-light switch.View part

Preserve the old diaphragm plate

The reservoir kit requires the diaphragm plate from the old master cylinder. Locate and inspect it before treating the new package as everything needed for reservoir work.

Keep aftermarket service parts with their assembly

The complete replacement is expressly described as different from the OEM design. Its 15.8 mm piston is a specification of that product, not proof of the original cylinder’s bore or compatibility with the separate OEM-reference repair kit.

Common questions

Which brake-light switch connections does the replacement use?

The integrated switch has two small spade connectors. Compare them with the motorcycle’s wiring before choosing the assembly.

Does the internal kit also replace the reservoir?

The reservoir and its cover components have a separate kit. Use that contents list for reservoir work rather than assuming those external pieces are supplied with the internal repair kit.

Can I keep the original lever on the complete replacement?

The complete assembly already supplies a black lever. Its design differs from the OEM type; do not assume the original lever or its service parts transfer to it.

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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