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1981 Honda CB900F Rear Light Hardware & Switch

Rear-light service on the 1981 CB900F Supersport can involve missing lens fasteners or a problem in the pedal-operated stop-light circuit. Compare the four-screw set and the separate rear switch, then order for the damaged hardware or diagnosed electrical fault.

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Honda CB1100F CB900F CB750F tail light cover screws 90147-147-671

1979-83 Honda CB1100F / CB900F / CB750F Tail Light Cover Screws ~ Replaces 90147-147-671

$2.95 USD
73-0899
Replace your tail light lens screws with this Tail Light Lens Screws, Set of 4, replacing OEM #90147-147-671.Key Features• Tail light lens screws• Set...
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Honda CB1100 CB1000 CB900 CB750 rear brake light switch 35350-KA2-405

Honda CB Rear Brake Light Switch ~ Replaces 35350-KA2-405

$22.18 USD
33-0024
Ensure your brake light activates properly with this Rear Stop Light Switch, designed as a direct replacement for several original Honda rear brake switches....
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1981 Honda CB900F Supersport · Rear Light Hardware & Switch Buying guide

Distinguish a lens repair from a stop-light fault

A cracked lens, stripped screw mounting and a brake light that works from only one control need different checks. Inspect the lens and housing, then test front-lever and rear-pedal brake-light operation separately before selecting parts.

Parts to consider

1979-83 Honda CB1100F / CB900F / CB750F Tail Light Cover Screws ~ Replaces 90147-147-671 Four tail-lens screwsSet of four screws replacing reference 90147-147-671.View part Honda CB Rear Brake Light Switch ~ Replaces 35350-KA2-405 Rear brake stop-light switchRear-pedal-operated brake-light switch for the 1981–82 CB900F.View part

Check the Supersport lens and housing together

The catalogue’s red lens references 33702-422-671 for the CB900F Supersport; the CB900C uses a different listed lens. The four-screw set references 90147-147-671. Inspect the gasket and housing as well as the lens, and do not force fasteners into cracked or stripped mounting points.

Check which control fails to light the lamp

The front and rear brake controls have separate switches. The featured rear switch is pulled by the pedal linkage. Check its spring, adjustment, connector and electrical operation; if neither control lights the stop lamp, inspect the shared lamp and wiring too.

Buying questions

Why does the brake light work from the lever but not the pedal?

The front and rear switches are separate. Inspect the rear pedal-operated switch, its spring and wiring, and test it using the Honda procedure. A working front switch does not prove that the rear switch or linkage is sound.

Do I need a complete tail lamp when only the lens is cracked?

The CB900F red lens is listed separately under reference 33702-422-671. Inspect the housing, gasket and fastener points before deciding a lens-only repair is sufficient. The screws do not repair a damaged housing.

How do I avoid cracking the replacement lens with the screws?

Match the original fastener reference and length, seat the lens squarely and start the screws by hand. Tighten evenly without forcing the plastic. Check stripped or cracked mounting points rather than using extra tightening to hold the lens.

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