the driven pulley has 1 to 6 on it with it being able to be adjusted. what does this do? it is at about 2.5 now. i just adjusted the drive pulley from 3 to 4 to get a couple hundred more rpms, was wondering if i should adjust the driven pulley also. the sled has 2200 miles on it, so i wanted to try and dial it in better for the rest of the year till i can re do the clutch this summer.... thanks!