Just went from a 200 to a 190 rear. With the 190 being a smaller diameter, I needed to shim the rear shock to retain the original suspension geometry. I could'nt find any shimming info on a search of this site, so I decided to post up my findings. Shimming was done on a '02. To raise up the rear .25, use a .125 thick shim, to raise the rear .375, use a .188 thick shim. The lift from the shim is just slightly more than double the thickness of the shim.
Remember that to retain original goemetry, you are raising the rear of the bike the difference between the original tire radius and the new tire radius. NOT diameter, but radius.
Remember that to retain original goemetry, you are raising the rear of the bike the difference between the original tire radius and the new tire radius. NOT diameter, but radius.