Suzuki GSXR 1000 no full performance

Hello, and indeed I have a small big problem with my Gsxr.. I got a submersible engine (11000 km) installed a few weeks ago because my old one broke.. Now I drove a little bit more today, was like before from the acceleration etc. everything good. Then I went up to the highway and then noticed that it did not move in the fifth gear at 240 kmh.. at 250 kmh in the sixth was then over.. 10500 turns, then is over.. in the fourth gear at 240 kmh.. at 250 kmh in the sixth was then over.. 10500 turns, then is over.. I’m 235 kmh at 11000 turns.