Dear no need to jo for injector thing i am going to tell you one thing now
There is one thing in carb that is called Tube silai in local mechanic language, ye ap ki acceleter ki cable ka sath attach hoti hay inside carb, is pe 3 circles hotay hein at top for adjustment, in genuine condition ye 1st pe ya middle pe hoti hay set it on 3rd no from the top then see the difference. check your self