Sticking Carb?

Could try loosening the cap on top of the carb. It doesn't take that much pressure to seal the top ~ that's why they made it so it looks like you should only tighten with your hand.

It could also be the throttle cable not turning back in the cheap plastic throttle tube. They're notorious for breaking if you're at all abusive to them...

ok this is what i would try first take slide out of carb loosin cable so it doent pull run the slide in and out (thats what she said) and see if its sticking then take off slide from cable make sure the cable housing is tight against throttle and it is twisted foreward then grab the cable end and twist the throttle back and forth pulling and retracting if there is resistance your cable might be twisted rusted or have some dirt in there or it could b the rather low quality of the twisg grip

hope this helps

Happen to me with stock carb. I took some steel wool and wound it up and put it in my drill and lightly honed out the throttle body till my slide action was smooth.