My kids 90 needs front brakes already and the manual was not that clear on how to measure if they are with-in tolerances so I adjusted the screws out all the way on the handlebar and the quad would not stop. Two of the shoes looked to measure barely with-in tolerances specified in the manual BUT we mud a lot and was wondering if there might be something else wrong? So is this possible new brakes in one season? and if yes where might be a good place to but the shoes?