Front Drum Brake Light Switch | Vintage Honda Twins
Squeeze the front brake and nothing lights up? A dead brake light switch means the car behind you has no idea you're stopping. This Japanese-made replacement is a direct fit for all vintage Honda twins with front drum brakes.
Why You Need This
The front brake light switch mounts inside the brake lever perch and activates the tail light when you pull the front brake lever. After decades of use, these switches wear out, corrode, or break — leaving you with no front brake light activation. That's a safety issue and a failed inspection in most states.
Our replacement is a high-quality, Japanese-made switch that's a direct match for the OEM part. Plug it in, seat it in the perch, and your brake light works again.
Specifications
| Spec | Detail |
|---|
| Replaces OEM Part Numbers | 35340-320-670, 35340-344-830, 35340-GAN-620, 35340-102-003, 35340-187-700, 35340-401-681, 35340-401-682, 35340-437-661, 35340-329-003, 35330-391-690, 35340-147-000, 35340-329-010, 35360-341-000 |
| Fits Models | CB175 K0–K7 (1968–1973), CL175 K0–K7 (1968–1973), SL175 K0–K1 (1970–1972), CB200 K0 / CB200T / CL200 (1973–1976), CB350 K0–K5 (1968–1973), CL350 K0–K5 (1968–1973), SL350 K0–K2 (1969–1972), CL360 K0–K1 (1974–1975), CJ360T (1976–1977), CB450 K0–K2 (1965–1969), CL450 K0–K6 (1967–1974) |
| Made In | Japan |
| Sold As | Individually |
Does NOT fit disc brake models: CB350G, CB360G/T, CB450 K3-K7, CB500T, CB500K, CB550, CB750. Disc brake bikes use a hydraulic brake light switch mounted on the master cylinder — not this lever-perch switch.
Note on early models: Some early CB175 K3, CL450, and CB350 models used a cable-mounted brake light switch (no longer available). Converting to this lever-perch style switch requires a right-hand lever perch with a switch mounting hole and re-routed wiring.
Installation
Difficulty: Beginner
- Disconnect the old switch — Unplug the two-wire connector from the old switch.
- Remove the old switch — Pull the old switch out of the brake lever perch.
- Install the new switch — Seat the new switch in the perch, making sure it's properly aligned with the lever contact point.
- Connect — Plug in the two-wire connector. Make sure the connectors are clean.
- Test — Turn on the ignition and squeeze the front brake lever. The tail light should brighten.
Our Taillight & Parking Light Circuit video covers brake light switch testing and diagnosis as part of the full tail light circuit walkthrough.
Frequently Asked Questions
Will this work on a disc brake model?
No. Disc brake models (CB350G, CB360G/T, CB450 K3-K7, CB500T, CB550, CB750) use a hydraulic brake light switch that mounts on the master cylinder. This switch is for drum brake lever perches only.
My early CB350 or CL450 has a cable-mounted switch — will this fit?
Not directly. Some early models used a brake light switch mounted on the cable. That style is no longer available. You can convert to this lever-perch switch, but you'll need a lever perch with a switch mounting hole and some wiring rerouting.
How do I test if my brake light switch is bad?
Disconnect the switch wires and jump them together. If the brake light comes on, the switch is bad. If not, the problem is elsewhere in the circuit — check the bulb, ground, and wiring.
Does this fit a CT90?
Yes — the CT90 and many other small Hondas (CT70, SL70, XL models) use the same style switch. See the full fitment list in the compatibility chart.
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Last updated: March 2026
