Performance of a Suzuki GSX 600 F

Hello everyone, need help from Suzuki experts, so this is the following: I bought a used GSX600F in June of this year and I am somehow disappointed with the performance. She has 85 hp and has been throttled since BJ 95, i.e. from the factory! I had it throttled when I bought it and I already drove about 700 KM… At the moment she comes to a maximum of 180 KMH (with very high consumption) according to FZS she should run 215 KMH. My question now is this normal and needs his time and how do you proceed or should the performance be there already??? Please for help….. Greetings to all bikers Madiiin