Starving for fuel after valve adjustment!! Please help!

Have a 98 gsxr 600 that i paid a shop to do a valve adjustment. When i went to pick it up it acted as if it was starving of fuel at high rpms after 1st gear. If you tape off the air ducts it runs fine telling me its a fuel issue. All lines have been replaced fuel pump is priming and puttin out a steady stream at idle. Plugs are new. Carbs have been cleaned. Only thing i havnt done is clean the fuel pump. They did have to remove the carbs as one peice and remove the tank. They say valves are in spec according to manual. Is there something they could have done to make this happen or maybe im missing? PLEASE help i love this bike so much!