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1979 Honda CB750L Master Cylinder Parts

Identify the master cylinder on your Limited before ordering reservoir or internal repair parts. The original-style four-screw reservoir has a dedicated kit, while complete aftermarket assemblies use their own components. A similar black finish does not make their repair pieces interchangeable.

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Currently viewing Master Cylinder & Rebuild Parts

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Honda CB900 CB750 CB650 front master cylinder assembly

Honda CB900 / CB750 / CB650 Front Master Cylinder Assembly

$109.95 USD
08-0457
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

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

$74.95 USD
29-0050
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
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 CB750 CB900 CB650 master cylinder diaphragm 45520-422-026

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

$11.50 USD
08-0285
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
08-0231
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
73-0850
Replace your rear brake stop switch spring with this Rear Brake Light Stop Switch Spring. This is the spring that attaches to the rear...
Honda CB650 CB750 CB900 replacement brake lever for master cylinder 08-0457

Replacement Brake Lever for Master Cylinder 08-0457

$9.95 USD
08-0018
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

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 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
29-0070
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 CB750L Limited · Master Cylinder Parts Buying guide

Decide between reservoir and internal repairs

Reservoir refurbishment and an internal master-cylinder rebuild address different areas. Compare the installed assembly, cap pattern and parts references before choosing one kit or replacing the whole unit.

Parts to consider

Honda CB900 / CB750 / CB650 / CB400 Master Cylinder Reservoir Rebuild Kit Four-screw reservoir kitReservoir, cap, diaphragm, O-ring and screws; reuse the old diaphragm plate.View part Honda CB Front Master Cylinder Rebuild Kit ~ Replaces 45530-442-315 Internal master-cylinder kitLimited-listed rebuild kit replacing reference 45530-442-315.View part

Inspect the reusable plate

The reservoir kit requires the diaphragm plate from the existing master cylinder. Confirm it is present and usable before ordering. The new plastic reservoir, cap, diaphragm, O-ring and screws are named contents; they do not establish that the hydraulic bore is serviceable.

Treat an aftermarket assembly separately

The black replacement assembly has a 15.8mm piston and a switch with two small spade connectors. Its matching replacement lever is specific to that assembly. Have hydraulic suitability checked for the actual brake system rather than assuming every master cylinder in the grid is a stock substitute.

Buying questions

What must I reuse with the reservoir kit?

Reuse the old diaphragm plate. The kit includes the reservoir, cap, diaphragm, O-ring and screws, so check that the retained plate is available before beginning the job.

Does a reservoir kit rebuild the hydraulic piston?

It addresses the named reservoir components. Internal master-cylinder work uses a separate kit and requires inspection of the hydraulic assembly before ordering.

Can I use the aftermarket replacement lever on the stock master cylinder?

The dedicated replacement lever is only for its matching aftermarket assembly. Choose a lever from the identity of the installed master cylinder, not from motorcycle fitment alone.

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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