hey guys whats the deal with the nut ontop of the rear shocker i can not screw it down to make my rear shok stiffer ? how would one do this , does one need a tool to do this?? and also i got front forks with these knobs on top that you turn left or right to slow the forks and stiffn but when i turn them i dont see a difference, i must admit i am clueless to the whole adjustable forx thing so i need all my mini bike friends to pull me out the shiyt once again thanx boys