Ferris IS 700Z... STRONG VIBRATION AT IDLE

hi all... Is it normal for the tensioner to really vibrate and bounce around at idle? My machine only has 1 hour on it. When I run it at full throttle, the vibration goes away... But at half to low throttle the machine is really vibrating.... Ps... I do NOT have the PTO on when it's vibrating. I have the kawasaki 23hp engine.

Any help would be greatly appreciated...

Ferris IS 700Z... STRONG VIBRATION AT IDLE