Perfect engine will be smooth.
I purchased the bike in Jan 2019. Now completed 3100 KMs. A very refined engine with smooth sound. Body balance is also good. Mileage in city and highway is 70 to 71 KM (no difference in mileage in city and highway). After purchase I brought this bike through road from Kerala to Bangalore which is 580 KMs with a constant speed of 50-60 KM/h and there was no change in engine sounds through out the journey of 580 KMs in one day. The only halts was 3 times for food. The only thing is feels less power compare to old (Euro-I) bikes.