I am using a 2000 Yamaha R6 for this year's track season. Last time I used it I was downshifting from 3rd to 2nd whilst braking at the end of a straight line and the engine stalled locking the wheel (or the wheel locked stalling the engine). This happened two more times after that, at different rpms since I was testing out the behaviour. It was always between 3rd and 2nd. I was blipping the throttle to rev match.
Since then, I tested all the gears up and down by putting the bike on paddock stands. They seemed to work fine and I was unable to reproduce the behaviour.
Now before I open the gearbox blindly searching for something wrong, I'd like to know the possible causes for this behaviour. I'm guessing a damaged shift fork but could it be something else?