Renting bikes is more popular in some places than others, but no matter where you are, if you go to a bike shop and tell the boss you want to rent a bike, he will usually find one for you quickly. It is mainaly a matter of price (I paid $7.00/day in Jaipur).
And yeah, take some time to get used to the traffic.
Nine mile skid on a ten mile ride. Hot as a pistol but cool inside.