Goodd Looks but less Mileage

Goodd Looks but less Mileage

I am using this bike from last 6 months and i am driven 3700km. Before 1st service bike was giving 45kmpl at any speed and riding quality was excelent.After 1st service what they done I dont know I went 7 times again for the reason of engine problem but still the problem is not resolved I am waiting for 2nd service.
Style Looks good.
Engine Performance, Fuel Economy and Gearbox : poor,
engine is off when putting the gear at starting, gear lever shift autmaticaly 1 st neutrol, 2nd gear is very hard need hammer to change the gear1st 2nd, pick up is very bad when 2 people riding in bike need full rise of accerelator,
fuel economy is in speed 50 : 50-52kmpl.
speed 60 : 45-48 kmpl.
speed 70-80 : 40-41 kmpl.
above 80 : 35-40kmpl.
Engine vibrates in 50 and you will feel bad to drive the bike and creates large knocking sound it hears only if you wear the helmet, and it struggles to move in small hill(around 100meter).
Ride Quality & Handling Very bad after 1st service.
Final Words: If u want 200cc bike milegae in 150cc bike and 100 cc pickup in 150cc bike you can go for this.
Areas of improvement: Mileage, engine perfomance, service.