Hey guys. I just purchased an ‘09 ZX6R with 13,400 miles. The bike has a twin brothers black series exhaust. I have run into an issue. At low RPM under load the bike runs well. When I roll into the throttle it starts to bog at around 7000 RPMS. Sometimes it will do this and other times it takes off. It just seems like it’s choked out. I called a dealership and asked if they had seen the issue and they said that it could potentially be a TPS sensor that is failing, and would require a new throttle body. Other threads have said it could be a fuel issue, and some have said it could be a spark issue. I was wondering if anyone else had this problem and was able to find a permanent solution.