I own a Yamaha RX 100, Guess the mileage? I get an amazing 50-55. Wanna Know How? Just adjust the air screw to’Zero’ so that the engine goes dead when idle, now when you ride the bike go till 60 KPH and leave the engine idle, then accelerate again and do the same, Thats it, You can try this on most bikes, try not to Accelerate more than 80.
Keep your bike fit in every aspect, check the tyre pressure regularly, Attend the Chain whenever you hear the extra noise, try replacing the airfilter with Vacuum Cleaner tissues, You’ll see the Magic Work for You