Rear wheel going faster has nothing to do with speedo calibration which is governed by the OEM sprocket size in relation to the magnetic pick up sensor. You will turn more RPMs to achieve the same speed.
OT: Sorry about the delay in response my home PC imploded saturday morning and I am using my mothers PC since I am in the field now at work and do not have acces to my work PC sine I rarely go to the office now. New DELL is on the way hopefully I'll have it by this weekend, computer death is so painfull
