I have a hero splender+ bike. I purchase it two year ago from local agency.till 1 year its milage was too good but after one year I got it’s milage get losed.in new its milage was 75 near about but after 1 year its became 45.I give all services but its milage is same and it’s sound valume also increase.it’s review is not good. I have one other splender plus bike also.till now it’s milage and sound quality is good.but I don’t know how it’s one bike milage became less.