This is bs4 and i3s futured new bike.good milage and good looking bike. this bike have very good resale.costumers are becarefull aout i3s model bike.keep distance the key from children beacause the is always connect the bike it ll automatically started the bike then touch the gear move forword its very dangerous to children.i3s model bike comfort to city people. because the bike at traffic the gera stay in nutral ( N) within 30sec it will automatically stoped the engine and pres the cluh it will automatically started the engine.So its very usefull who traffice faced people.