Sounds like your not getting any slipping. If the belt breaks rear wheel wouldn't lock. You'll need to push or tow it home, as there's nothing connecting the engine to the rear wheel.I took it to 70mph on an upgrade and was at 6.5k but will have it inspected.
What happens if the belt breaks while riding? Does the back tire sieze up?
The RPMs at the speed he indicated to me that the belt is not badly worn. I do oil and filter changes as well as check my tires frequently. If it ain't broke..... It has worked for me for the last 40+ years and 16 bikes. Never had a breakdown or major problem.Disagree, osbornk. I would pull the cover and measure it. Nothing like knowing!