I'm not one of the Smart Guys, by the way. Keep waiting. But, have you checked the slack in the clutch lever to be sure it's at proper adjustment? And insured there's no binding, top or bottom, at pivoting pieces attached to, and being moved by, the clutch cable? I doubt either would affect the RPM, but there may be a sensor somewhere in the system that looks for proper movement. Some motorcycles have a sensor in place, that is activated as the clutch lever is released,... to slightly raise the RPM to prevent stalling the engine. I don't know if your GSXR750 does, or not.. Just throwing it out there.
Yeah, my bet is the clutch cable is encountering the throttle cable somewhere, and the tension is tweaking the throttle a bit. Try what John said, turn it all the way left, see if it still does it, or at least changes, then do the same for turned all the way right. If one way or the other make it stop, chase down the routing of the clutch cable, and correct it.
Thank you guys, I really appreciate your help.. didn’t get to look at her tonight, busy etc... but tomorrow I have a free evening, so I will try all your suggestions tomorrow and let you know the results....fingers crossed 🥴👍👍👍
unbelievable guys but glad to say I have solved the issue, it was all caused believe it or not by my fast idle not being set up correctly, now that’s all spot on the problem is solved👍👍👍👍. A BIG thank you to all that took time to try and help me, can’t thank you all enough, stay safe 🤝 joe