I use Puig R12 frame sliders on my Yamaha R3 motorcycle. The frame sliders are held in place by 12.9 grade stainless steel bolts (https://www.boltdepot.com/fastener-information/materials-and-grades/bolt-grade-chart.aspx) such as the ones below:
I got my frame sliders just 2 week ago and the bolts holding the left frame slider has broken off 2 times in that duration! I was wondering what the issue could be. Also, what sort of bolt grades can I get that is more resistant to breaking off? The frame sliders coming off due to breaking bolts makes them quite useless if my bike was to fall off. Kindly suggest.