Hi, i am using hero duet. The company claim 63.8 KMPL but we have getting only 40 kmpl. tell me y & wat to do to get 63.00 kmpl

hi, i am using hero duet. The company claim 63.8 KMPL but we have getting only 40 kmpl. tell me y & wat to do to get 63.00 kmpl.

Question asked from: http://www.carandbike.com/hero-bikes/duet