Motor Side Cover Kit Right

I had removed the cover once to service the chain and sprockets and later when I did it the second time I was very surprised to see several cracks around the lower bolt hole. Of course it’s possible that I may have over tightened it but I was very careful not to do so. Before I purchased a replacement cover I cleaned the area around the hole and strengthened it on both sides with fiberglass cloth and epoxy. It is now stronger than the new one which I’ll keep as a backup. My suggestion is to change from whatever less expensive plastic you are now using and get one with substantial strength to take the stress around the bolt holes.