I am about to put the motor back together for this little beast,and I was looking at the cylinder, and I am wondering if it is supposed to have a sleeve or not.All off the other 2-stroke motors have them,do the zingers have em? I had this jub bored 50 over, and I am thinking maybe it is stuck in jug and dicolored and maybe I don't see it?Please help me out. Thanx