No, that's not a common issue to have happen on SW-Motech. Vibration is the nemesis of ALL bolts. Are you sure the PO didn't install the bolt? Did he tell you he didn't? If he didn't install it it may have been because the MoTech Engine Guard can be a tricky plate to install and maybe he did indeed give up on adding that particular bolt. Every time you remove or add something to your motorcycle you need to follow-up religiously and go over each bolt to make sure they are still securely in place. If you don't you could pay the price of just what you're talking about. Missing bolts.Bought my 2018 used and just noticed the front main engine bolt is missing.
The PO installed the skid plate and did not install the bolt .
I can easily fix it just wondering if this is a common problem with Motek.