Originally Posted by Kevlarr
Is there any space between the frame and the mount before you tighten it? In my experience if you have to pull the motor to the frame at all when you tighten the mount your studs are going to break.
Try adding a pair of 1/4" flat washers between the mount saddle and the block next time.
There isnt any space between the mount, it sits perfectly flush on the tube. Could 2 washers really make that big of a difference though?