The damage in that photo is from a crash. Look how relatively weak the design is compared with a much more compact 2 stroke.
ARP, a leader in the bolt business has a slogan, "tightness is what keeps bolts tight".
The acquired feel for how tight this is is easier understood if you can visualize tightening the bolt to the point of stretch, but not to the point beyond the bolt's elastic limit to return to the original length when loosened.