I'm not sure the clutch pedal question on the CK HST's has been clearly answered for the OP. You don't use a clutch on HST's to "shift". If the HST has a clutch pedal, like the CK's do, it's to control the live PTO and has an integrated safety switch for starting the tractor. Other HST's have an electrically actuated PTO clutch operated by a switch on the control panel. These, won't have a clutch pedal.
HST's have either a two pedal setup or a rocker pedal. The two pedal design, one is to go forward, and the other is reverse. The rocker works similarly, rock forward to go forward, rock back to go in reverse. It's kinda like a car - the further down you push the faster you go. When you remove your foot from either pedal, the tractor generally will stop, or almost stop depending on tractor and how steep the incline. On most HST's the brake is seldom used to stop, but is there for emergencies, turning (when independent L/R brakes), holding, and parking.
There are many many posts on HST operation that will delve into this more deeply. Do a search for them. The Kioti forum will cover the Bobcat's operation because it's the same tractor.
