My 2004.5 Popo 700 developed a loud "clacking" noise in the top end (right side) while plowing snow for an extended period two days ago. I shut it down for the night, re-started in the morning, the noise persisted. Power was down slightly. As I loaded into the truck it quit. I took it to the dealer. Two days later they reported they fixed it "by changing the (week old) oil, filter and spark plugs."

I got the foreman on the phone, re-explained the problem. He's now pulling the head.

Any suggestions what I'm looking at?

 

sounds like valves to me pushrod bent idk what is in these i have only adjusted brigs overhead valve engines on my old race car nevery my quad.

 

If by top end you mean valve cover or head, then it must be valve train related. They are fairly simple, not much different than your typical small block V-8. They should be able to tell fairly easily once the valve cover is removed.

 

Probably a stuck lifter, Ive heard of this.