Dunno how your gas is out there in India but here in Cali if you leave gas in your carb for 3 months you can pretty much bet on plugging a pilot jet. Take apart the carb and clean the jets - make sure you can see light through them. Put new gas in the tank. I usually take my old gas and slowly add it into my bikes/lawnmowers/etc. Just a few ounces per tank to burn it off.