Just plug and play ...
http://www.secondstrike.com/Technical/GearCalc.asp
Speed (MPH) in Gears at RPM
Speed (MPH) in Gears at RPM
Gear 1st 2nd 3rd 4th 5th 6th
Trans Ratio 3.27 1.98 1.34 1.00 0.68
Overall Ratio 11.61 7.03 4.76 3.55 2.41
Split 1.65 1.48 1.34 1.47
Rev/Mile 9,380 5,679 3,844 2,868 1,950
1500 10 16 23 31 46
2000 13 21 31 42 62
2500 16 26 39 52 77
3000 19 32 47 63 92
3500 22 37 55 73 108
4000 26 42 62 84 123
4500 29 48 70 94 138
5000 32 53 78 105 154
5500 35 58 86 115 169
6000 38 63 94 126 185
6500 42 69 101 136 200
7000 45 74 109 146 215