water can also get in the tank if you dont plug the...damnit....we just went over how to wash bikes today...I know it's dumb but some people had no clue on how to wash bikes....and they are going to be tech's.....remember that when you go to a dealership...lol but it can get in the gas tank true like a relief valve or something along those lines...sorry I can't be specific...long week getting screwed over by the school seems they like to take your money but not give you money they owe you. also it could get into the carb if you dont have a tight seal... around the carb. But those are just words from a tech in training....sorry again for my lack of technical jargin.