I still dont understand why some people go take a tooth out of the front and + 2 in the back. Can someone here explain what it actually does to the bike, Do you get higher or lower top end does it make it easier to do wheelies. Basically I just want to know when you take tooths out of the front or back what does it do to the bike? or when you add then to the back what does it do to the bike? I want to do a setup that will be good for wheelies and good for the track?