XJRider.com

I just started riding my xj600 from 96 and i love it! But i think there is something wrong with my acceleration. When i give the bike full throttle it pulls ok up until 7000rpms after that it pulls really well, as if power really kicks in. But after 7000rpms the sound also changes. It sounds way better and more racey. Up until 7000rpms it sounds more like a 2 cylinder (but it fires on all cylinders). Has anyone experienced something similar or has an idea what coud be the cause of this problem?

I hpe you guys can help, ride safe!