Will kx 125 be powerful enough for me?

im 6 feet 4 inches tall and i weigh about 280. im a big boy to say the least. i just sold my 250cc giovanni and im looking for something thats bigger and has more power. how much hp does the kx have and would it pull me. i really want the kx to go to our local track. also with the suspension set up will the bike take my weight on small jumps. also if i do get the bike what mixing oil should i use. and also what oil is best to use in transmission. thanks you very much.