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1981 Honda CB900C Custom Brake & Clutch Service

Keep the 1981 CB900C Custom’s brake applications attached to the exact year and position when building an order. The dual front-caliper kit is year-specific, the rear master-cylinder kit has its own reference, and clutch plates must be counted by type rather than appearance.

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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
1980 Honda CB900C Motorcycle Parts 1981 Honda CB900C Motorcycle Parts 1982 Honda CB900C Motorcycle Parts 1983 Honda CB1000C Motorcycle Parts Honda CB Brake & Clutch Parts Honda CB Brake Master Cylinders & Rebuild Kits Honda CB Electrical & Ignition Parts Honda CB Motorcycle Parts on Sale Honda CB Switches & Sensors Honda CB1000 Motorcycle Parts by Model & Year Honda CB900 Motorcycle Parts by Model & Year Honda CB900C Custom Motorcycle Parts (1980–1982) Series 4: CB900-1100 (80-83)
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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1981 Honda CB900C Custom · Brake & Clutch Service Buying guide

Choose the repair before choosing the kit

The 1981 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

1981 Honda CB900C Front Caliper Rebuild Kit 1981 dual front-caliper kitRepairs two front calipers; specifically listed for the 1981 CB900C Custom.View part Honda CB Rear Master Cylinder Rebuild Kit ~ Replaces 43520-461-771 Rear master-cylinder repair kit1981–82 Custom application; reference 43520-461-771.View part Honda CB1100 / CB1000 / CB900 / CB750 Clutch Friction Plate DOHC #1 ~ Replaces 22201-425-000 Friction plate type 1DOHC friction plate type 1; seven are specified per motorcycle.View part

Match the brake hardware

Use the 1981-specific front-caliper kit. The listed 42.8 × 41 mm piston serves the 1981 front and the 1980–81 rear applications, but the repair kits remain position-specific. 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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