The clutch is fairly stiff, if you think it's too stiff it might be worth checking the cable isn't showing any signs of fraying. It's not uncommon for them to snap.
The throttle should be quite loose. Again check the cable but also check the throttle mech works smoothly on the carb.
The throttle also moves the accelerator pump jet on the carb, it's a rod held in with a small plastic grommit. I've known them break up and fall out, so check that moves smoothly as well. Last thing you want is the throttle jammed open.