I got myself a small Shark S800 helmet at the bike show. Everything feels fine at the show and during the first hour of my ride on s2s. After an hour of riding, I started to feel that my lips are touching the chinbar at high speed. Is this normal? or I would be knocking my teeth off if in the event of an impact? I've had 3 other helmets before (including a Shark RSF) and never had the same problem.. help me out guys..