My 1990 CBR 1000 accelerates smartly, but at around 5,000 RPM, it really wakes up. I told this to a mechanic and he said that at around 5,000 RPM the needle pulls out of the main, so the bike is mostly running on the main jet. He said that my needle may be lean, to meet emissions, and that I should put in a Dynojet kit, which may wake up the lower RPM.
I've taken apart my carbs many times and have balanced them with my carb stix, so I have no fear of the carbs. Should I just get the kit and install it to see if it wakes the lower RPM?