hey guys so after about 5 sprockets since my last post i found the stock part for my kart so im waiting to but it but i wanted to know whats a good spring i should put on the throttle pedal and what are some good quality nuts and bolts that can be used on my mounting process and also is there anywY to fix mushroomed edges becuase i cant bolt tires on to stay on axle which cuases sprocket to slide and bend and do you guys have any tips or tricks to putting a sprocket on a axle