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1980 Honda CB900C Custom Brake & Clutch Parts

Front and rear brake parts differ on the 1980 CB900C Custom, and the clutch stack contains several distinct plate types. Identify the assembly being serviced before choosing a kit. Treat a changed master cylinder or lever perch as a separate compatibility check.

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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•...
Sale
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...
New
Honda CB900C front brake caliper bolt set 90123-371-000

1980 Honda CB900C Front Brake Caliper Bolt Set ~ Replaces 90123-371-000

$12.95 USD
99-4978
Upgrade or restore your classic Honda motorcycle front brake assembly with this Front Brake Caliper Bolt Set — a quality replacement designed to secure...
Honda CB900C CB750F caliper bleed screw rubber cap (stock type) 43353-548-003

1975-80 Honda CB900C / CB750F Caliper Bleed Screw Rubber Cap (Stock Type) ~ Replaces 43353-548-003

$4.61 USD
73-0906
Replace your caliper bleed screw rubber cap with this Stock Type Brake Caliper Bleed Screw Rubber Cap. Same design rubber cap as the originals...
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1980 Honda CB900C Custom · Brake & Clutch Parts Buying guide

Choose the repair before choosing the kit

The 1980 Custom combines hydraulic disc brakes with a cable-operated wet clutch. A soft brake lever, dragging brake and slipping clutch call for different checks before parts are ordered.

Parts to consider

1977-80 Honda CB900C / CB750F Front Caliper Rebuild Kit Dual front-caliper rebuild kitRepairs the two front calipers on the 1980 CB900C.View part 1980-81 Honda CB900C Rear Caliper Rebuild Kit Rear-caliper rebuild kitJapanese-made rear-caliper kit for the 1980–81 CB900C Custom.View part Honda CB1100 / CB900 / CB750 Clutch Damper Repair Kit ~ Restore Smooth Operation Clutch-damper repair kitSeven rubber dampers and seven replacement screws; separate from the clutch plate stack.View part

Match the brake hardware

The 1980 front piston is 38.12 × 35.15 mm; the rear is 42.8 × 41 mm. Choose separate front and rear repair parts. A reservoir kit, master-cylinder kit and caliper kit repair different assemblies. Check the leak or sticking component rather than ordering every hydraulic part together.

Separate clutch adjustment from internal wear

Start with the cable and release mechanism. If internal service is needed, keep the two friction-plate types, ordinary steel plates and riveted steel B plate in their specified positions. Clutch dampers are a separate repair.

Practical questions

Will new brake pads cure a soft lever?

Not by themselves. Air, low fluid or a hydraulic leak can cause a soft or spongy lever. Diagnose the hydraulic system and restore a firm, leak-free brake before riding.

Should I order clutch plates when the bike creeps with the lever pulled in?

Check cable adjustment first. Too much free play can prevent full release; warped plates can also cause drag. Inspect and measure the clutch if correct adjustment does not resolve it.

Can I choose parts solely from the model year?

Use the year as the starting point, then identify the installed hardware. An aftermarket master cylinder, lever perch or changed caliper may require parts for that assembly rather than the original Honda unit.

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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