The Bajaj XCD 135 when driven between the speed of 45-55 kmph returns the best mileage and I personally have obtained much higher figures in the past. You should check the level of engine oil in the bike and even consult a mechanic as consuming engine oil points to the direction of engine seizing problem in the future. You should also get your air filter cleaned after every 3,000 km as it gets stuck with a lot of dirt due to our Indian weather conditions. You should get your carburettor tuned to a better efficiency level as wrong tuning increases fuel consumption. You will definitely receive a mixed mileage figure close to 60 kmpl if you follow these 3 steps and get it checked from an experienced mechanic or authorized Bajaj service center. The new meter can also be bought from the same sources and you can inquire about its cost from the concerned personnel at the service center.