I haven't been here so much, because my gearbox was messed up, so i had to ship it back & get another one.
The day I got the gearbox, I went for a 15 mile ride away from home since I hadn't ridden in almost 3 weeks. On the ride home, the stud didn't break.... but the "female" part of the mount - where the stud fits into - broke!! I don't have a Sad Time engine, so it might sound a little weird to you. Anyway, I have no choice but to buy an entirely new engine & gearbox for $120, since the part of the block that broke is gonna cost me $50+ itself. And I'm tired of shipping parts there, waiting, & waiting some more.
I had definitely tightened the bolts & had never had problems within 20 miles worth of riding, but with this new engine... I'm honestly going to be taking my own advice - replacing all bolts with Grade 8 bolts, replacing all gaskets, & putting blue Loc-Tite EVERYWHERE!! That prolly won't help you out, KiDD, but hopefully it will help someone out.