ok so i recently bought a suzuki lt 160 and the guy before me replaced rings and put it back together. Timed it wrong and broke the exhaust valve so i replaced it but back together and runs great but has a tick in the top end and smokes. So i tore it back apart cant find anything wrong with it. But as i look at parts pictures on the net i notice that there should be a valve seat on the valve when i replaced it i dont remember seeing this part. Could this be the reason why it is ticking and smoking when i push the exhaust valve down and let go it sounds like its the ticking sound cause when i push on the intake valve and let go there is no noise. Should i take the valve out and check thanks for your input the ticking and smoking is bad.