I bought honda cbr150r 2 month ago, till previous week it reaches 80KM at 5500 rpm, yesterday I drove outside the town I aware that at 5500 rpm it reaches 78KM, first I thought it can be because of wind resistance.So I want to know exactly the problem and I turn back and drove back to the town, it is the same.
There is a another factor take me to consideration of fuel delivery system, my cbr150r is EFI, roughly air and fuel delivery system is control by EFI according to the information provided from CDI. I am wandering why my motorcycle's performance decrease? Now it reaches 80km at 5800 rpm. Any suggestion is greatly appreciated.