The best 100cc bike in India according to me is the Hero Splendor iSmart. It is also the most fuel efficient bike on sale in India to utilization of start/stop technology that helps it return a very healthy claimed mileage of 102.50 kpl. Powering the bike is a 97 cc single cylinder air cooled engine that is good for 8.2 bhp and 8.05 Nm.According to me bestest bike for todays lifestyle.