I have an o1 wr426f 15/49 and im changing it to a 15/46. any tips on putting the new sprocket on? and new bolts an screws are needed? help thanks. also I have smaller tires I got so it made a small change but im only getting 50 mph with the new wheels at med rev. im wondering if I can get 55-58 from this change any help or tips/tricks !