DEAD CT3

NEED some help people and I am desperate.. Bought this CT3 about two or three years ago and road it for like a day before the throttle started sticking so bad.. It will hold open throttle sometimes and i am super confused on how to fix it. I took everything apart and looked it over for scuffs and marks that could affect the drop throttle and still it soon as the bike gets a liitle warm the throttle will stick very bad. I have had the bike for sometime and its just sitting in the garage because no one in my town will work on it. Please give any advice you my have THNAKs...