With no hour counter I can only assume it was close to 100hrs based on the wear on the piston skirt. Based on the performance I couldn’t really tell if it needed to be done or not. I can say if it did run much longer in that condition the cylinder walls would start to except the same wear as the piston skirt. My advice is if it’s questionable then just do it better safe then sorry. You could always start fresh with an hour counter. This bike was running at 40:1. The people at SmartCarb systems said that was rich for the beta Xtrainer and they recommend 60:1. We chose to split the difference and are running 50:1 after the break in period. During the break in we are still running the 40:1 ratio. A compression test could give you a good idea of where your at in piston to cylinder engine life but you will still have good compression as your piston is starting to wear. The objective is for the rings to be the only component taking the wear. Only sure thing if you loose track is to inspect and at that point why not just do it. Thanks for watching my video. I hope I helped answer your questions. Braaap on and safe riding!

Great info and thank you for taking the time to give such a good detailed reply. My 2021 model is fairly new to me so I'm trying to get a feel for what to expect from my bike. Mine has 28 hrs on it. I suppose Beta put the hour meter on these at some point because mine has it built into the dash unit. @@grizzlymotomotorsports1029