First of all I'm stupid.Where do u guys get the mpg from? i normally dun get my rpm more than 4k when i do my riding as for the k&n i only put it in last week and i yet to see any different. normal before the needle hit the red zone wat is the distance can the tank make it if let say easily riding of rpm not more than 4k? And wat is the amount of fuel left starting from the red zone to the end where the tank is left with nothing.260 kilometer/hour = 161.55651 mile/hour (mph)
You should be able to get upto around 297kph (185mph). The only thing that I can think of is the K&N filter. Someone told me that if you change the filter out but don't get the computer remapped you might be running a little lean. If this is the case then that might be holding you back. Ask around and see if anyone else has heard this.
Anyway if you are getting 260KM out of a tank of gas that is about right. I normally get 160 to 180 miles on a tank.
When you push the botton for your odometer it should show how far you have gone and if you hit it again it should show your fuel consumption. I don't know if it will but I don't know way it wouldn't.
Again sorry about the confusion.