Unfortunately I've had a pile of new cases reported since making a vid about this, most at low hours. One happened before even the first hour was clocked up, the rider barely got into the trail.
Initially there weren't many cases in the USA when I first started looking into this but it seems it is now more common. I've been told one Beta representative saying it could be as high as 10% of the two stroke models... apparently another said 1% which is more likely from what I can see so far.
Apparently the factory is staying tight lipped about the problem so distributors and dealers are trying to work out the issue themselves. Initially some were saying it was probably a dodgy batch of bearings but now they are leaning toward incorrect installation in the factory.
Also at first it appeared to be mainly 2018 models affected and I was hoping it had been fixed for 2019 models, but there are 2019 main bearing failures as well now.
https://youtu.be/KwxvaJwvz6E