7. Audible warning
Audible warning (horn) rules and inspection for motorcycle MOT tests.
An audible warning must be loud enough to be heard by other road users.
It must not be:
- gong
- bell
- siren
- more than one tone
Motorcycles first used on or after 1 August 1973 must emit a continuous or uniform sound that is not harsh or grating.
Motorcycles first used before 1 August 1973 can have a bulb horn as the audible warning.
You must run the engine of a motorcycle with an electrically operated horn if a battery is not fitted or is insufficiently charged.
| Defect | Category |
|---|---|
| (a) Audible warning not working | Major |
| (b) Audible warning control insecure | Minor |
| (c) Audible warning not in accordance with requirements | Major |