First time out on my CBR, when cruising in town say 45mph in 6th gear, I grap a fist full of throttle and the acceration seems sort of lack luster. Once the engine rpms get to about 5,000 it sreams all the way to redline. I know I shouldn't compare to my CBX or Goldwing, but is this normal?

 

Yup, the delights of a 600 v 1000.
Also this is where the emissions are measured so generally there is a hole in the torque at that point.
I had my F3 fitted with a dynojet kit which evened out the torque curve but can't get a way from the lack of cubes!
At that sped you need to be in 3rd or 4th if looking to accelerate quickly or even second on a mad dash!!!!!

 

Thanks Al, this all makes sense. There is no replacement for displacement!!

 

One other thing I noticed is you mentioned 6th gear and 45mph. Normally you should be in a lower gear at that speed. These bikes take higher RPMs quite well. If you drop a few gears when your at that speed you we’ll see much better response.

 

I guess I shouldn't ride it like an old turd! Berhaps next time out I should flog it a bit. Thank you Hamlin6

 

You got it. You can literally be in 1st or 2nd at that speed.

 

my cbr f3 is having issues at like 20 mph as a valve on back of air box with pipes to it that opens 2 ways under 20 km/h its open 1 way and over 20 km/h it opens other way i think its not working and messing up the vaccum for sliders work not took it off test it yet im pretty sure I'm right anybody know and understand how I've put it ?

 

I know the trigger comes from the speedometer. Pink wire from speedo goes to the Air Vent Control Relay.