Yamaha Venom Brake Light

[Eagle River Mike]

My daughter has a 2005 Yamaha Venom. The brake light only activates when the brake lever is pulled almost all the way to the bar. She never brakes that hard so she is basically driving without brake lights. Is there a way to adjust the sensitivity of the brake lever so the brake light activates under lighter braking? Or is there a part to replace? I've looked at the part diagrams online and I don't see anything.

Thanks,