Poor milege

My new passionxpro giving the average milege of 50 km/l.Eventhough i highlighted during last service on03/7/14,the problem did not have rectified by the dealer
Details of my motor cycle are;
1)selling dir code;10141
2)Eng#;JA12ABEGA00208
3)vin:mbja12cega00059
4)contact no;9442360922, email;gsmoni66@gmail.com 5)address;no2,9thcross (E) bharathinagar trichy 17 Tamilnadu
kindly rectify my problem.