Your idle could be too high.
I'm not 100% sure how the T-max clutch works but I believe there is a slipper clutch you could have that too tight.
Or as mentioned above clutch bearings take apart your whole clutch assembly and look it over for worn parts and replace as necessary.
Also on your radio you could have turned the throttle trim too high (Small circle nob) there should be lines or a 0 somewhere around the circle.
Best of luck,
Tony