2013 sportsman 500ho knocking and smoking after all I did was change oil. My son had. A small wreck that only messed up right front control arm. After few months went to do oil change and as soon as started up after change it started smoking like freight train and a bad knock. Keep in mind no smoke before at all and a small knock. Tried oil treatment for ring repair and after just running it burned through bit of oil. Possible top end new rebuilt or blown rod is my question??????

 

Did you prime the oil pump? Doesn't sound like it.

 

did this get ran out of oil, submerged under water?