i have purchased hero honda cd deluxe bike on 22nd of sep 2010. i got it services after 700 kms. i use to keep my bike's speed betweem 45 to 55.i drive smoothly on highway.my daily run is about 20 kms, but the mileage of my bike is regularly decreasing. before it was giving around 55km per litre, but now it has decreased to 45 now. i had shown to authorised service centre in gandhinagar but improvment is not seen. Hero Honda claims 75 km per litre for this bike but my bike giving only about half of this.