I have my Verna running in very good condition until today, but only thing is mileage has suddenly reduced from 21 kmpl to 14 kmpl from May-2016. From July I became bed sick and I was unable to ride until today, but it was used rarely for my medical treatment run 12000 kms until today from May-2016. Now the cumulative kms run is 131000kms. So please suggest what will be reason and how to rectify the problem so as to get mileage of 21kmpl back. I will be ever thankful to you if the problem would be solved.