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Has nothing to do with the extra power! It’s the new split driveshaft. It has way too much play and wobble in itFind this very interesting as my 2022 Gen4 Expert 165 Turbo R has 940 miles (1512 km) on the original belt with no issues. Clutches and belt have been cleaned every three or four rides. High Altitude set up with clickers set on #3.
Maybe the extra power of the 2023 is harder on belts, could be clutching or just proper maintenance.
Time will tell.