I am not sure if tipping the bike caused the issue but I tipped the bike while parking onto it's left side - not much damage at all - the engine guard took most of the fall. I don't think anything to do with braking got hit at all and I immediately set the bike back up. Anyway - shortly after this happened I started having trouble with my front brake - the brake lever bottoms out before I get full braking. Could I have gotten air in the master cylinder from the tip or is there something else I should be looking at?