Trying to identify engine noise 2004 Sportsman 600
 

Here's a video of how it sounds...
Also attached are parascope photo of the top of the pistons

Curious to hear your thoughts?? Seems a rod would have a deeper sound

https://cimg0.ibsrv.net/gimg/atvconn...2f61d5c3ee.jpg
https://cimg1.ibsrv.net/gimg/atvconn...629c5eca14.jpg

sounds a lot of very loose valves. did you check the adjustment of the valves to rule it out?

X2 Agree with Stendori might be just some way slacked off rockers needed some adjusting be nice if that simple
Good luck keep us posted if poss.

Ok so drove it to my other garage and now it sounds like this... now I'm thinking rod???