It is important to flash your brake light when:

Question

Motorcycle brake lights are more difficult to see than the brake lights of larger vehicles, so flashing your brake light may help other drivers to notice it. You should flash you brake light before slowing down where other drivers may not expect you to slow down, such as in the middle of a block or when approaching an alley.

Accepted Answer

You will be slowing where other drivers won't expect it.

Answer

You are tired while riding.

Answer

There is a stop sign ahead.

Answer

Your signals are not working.