Hero Moto Corp — problem in my bike hero splender+

Address:

Ludhiana, Punjab

i purchased anew bike in january 2015, the averge of my bike near about 25km/l and i told to dealer and he said that this is anew bike this problem create .and other problem of my bike is that many times bike starts off and off .i try many times plug clenin but after few days this problem again creats