Advice on front &Rear caliphers

[PaulSmith]

I am not quite sure what your complaint is. An MOT is not going to check that bolts are correctly torqued, only that the brakes do their job. You can try to give out to the dealers or MOT shops  if you like, but they are going to tell you the same thing that I am. It is your bike and your life. Take as much or as little care of each as you want.

Looking at the parts fiche (which I suggest you use since you don't appear to have the Haynes manual) the rear caliper is held on to the carrier with TWO bolts, not one. Check that you haven't lost another one.  http://www.yamahamotorcyclespares.co.uk/...iper?uID=0