want to be able to swap dirt wheels and supermoto wheels in a short time and with limited extra parts.. ordered stock oem hubs and lacing them with 17" pro wheels rims so stock speedo can be used.. can the stock speedo can be calibrated correctly with this setup? manual says you can adjust tire size. does anyone know if this works? dirt setup im happy with stock 13/50 I would like to use same stock chain at 104 links.. I would like to have supermoto setup gearing taller with more topend..like 75mph without overreving. .what gearing ratios can you recommend ??