Yamaha 250 SHO bogging down

Hi All! My SHO recently started bogging down or doesn't seem to have power to get on pad. It runs fine at WOT but really seems to struggle to get on pad when fully tournament loaded. Seems to be worse later in the afternoon when hot. Have taken it to Fun N Sun and they have changed filters and plugs but yet it still seems to have the issue. They hooked it up to the computer and says all is fine and fuel pressures are good. Anyone have this experience? Suggestions?

Dirty injectors. Mine did the same thing. If the filters were bad enough to need changing....all of them....then the injectors are dirty too. My Yammy is so prone to this, I carry an extra set. It, if needed, can have a new set of injectors in 5 minutes. I've gotten good at it. Ha

Hey Steez. Thanks for the info. What's a set of injectors run these days for the SHO? Sounds easy to replace. Any pointers?