I heard that pinging too. Thought it was the quiet muffler letting all those internal noises be heard. Maybe have a look at the intake piston skirt for wear??? Piston slap?? Some of the new 572 stock saws sound like rattle traps on video as well.
Them Jonnys are a hellva nice looking saw, that's one of the primary things that endeared them to me over Husky,Red and black rule, I want to continue that theme with the Shindys namely the 600sx which is just an Echo 620, I also like Shindys version of the 7310sx but that is all but inobtanium in the U.S. market, just Australia, Europe sectors shame they are some sharp looking saws, I mean Hell who says you don't have to look the part to get shit done!!!!
Sounds like she needs a new piston, it will run alot better with a fresh piston. I always thought the 625 ll’s ran better than the 61’s probly because of the bigger better intake .
@zachdiehl3401 let's say you need a starter. Search on ebay for "52cc chinese chainsaw starter". That's how you do it. Use your best judgment and order the part you think will work. That's it.