I bought my 21 PRO at the end of September from a dealer in Ohio. It was used by the dealer a few times over the summer. It broke almost instantly when I got it home in west Michigan. Krash shipped me a new updated ECU the next day and I replaced the broken bendix, starter and start/stop switch with OEM parts I already had. I had to modify the flywheel with a dremel to work with the updated ECU mapping. I sent the carbs to Steve Bach while I was waiting for the ECU to arrive. I only rode it twice briefly before the season ended here but it felt strong and I got comfortable quickly for having very little tray time. The full carbon hull looks amazing and is very heavy duty.