Okay, so my ski was running like it had a fouled plug, i pulled the head off to find cylinder #2 had a battered look and there was a V shaped chunk missing from the exhaust side, I have purchased a new cylinder and all the necessary parts, my questions is what could have cause this problem? My first instinct was the piston ring spun around and hit an exhaust port. Now that I am about to put the ski back together I am nervous that it may of starved for oil or could be something else and the last thing I want to do is drop $600 into a ski for it to blow again.
I'm nervous because im not completely sold that I have fixed the problem like other guys on here who know right away when an oil line has popped off.
Any help or tips on what caused this, i know oil lines popping off is common but I'm not exactly sure on the location of those as this is my first ski and it blew up after I owned it for 2 hours, ran like a raped ape for those two hours but hey thats life

any help is much appreciated!!
thanks again