For some reason, the brake pedal comes set up way out of spec, from the factory.!!!! You'll need to set it so that it's just under your foot, when you're riding comfortably. A lot of riders don't bother resetting it, because they don't realise that it's necessary.
To adjust it, you'll find a bolt under the pedal. Loosen the lock nut and adjust the bolt until the pedal is where you want it, then tighten the lock nut. After you've done this, look under the exhaust side of the bike for the adjuster for the brake light. It's half way along the wire/spring set up. Twist the adjuster to tighten/slacken it until the brake light comes on after ½" or so of pedal movement. You may also need to adjust the screwed connector to the brake operating lever, on the rear brake, so that it operates with the correct amount of pedal movement.
It's a really simple job, and should take you ten minutes or so.
