The cost of the bikes were $20 (Yamaha XT600) and $25 (Honda Dominator NX650) per day which included insurance. You could get smaller Honda XR250 Baja for $15 per day. My friend and I split all costs. Total for everything airfare, bike rental, hotels meals and drinks, gas, tours and taxis came out to about $2900 per person.
Serafin