Advice on front &Rear caliphers

[VNA]

To reply to above posts I agree it is my responsibility to ensure the bike is maintained in a road worthy condition. But one would expect when it is serviced by an authourised Yamaha dealer it would have had the bolts set to the correct torque and not be backing off like this. Yes I will keep a better eye on things now that I am aware that they can become an issue. I have on order a complete set of caliper bolts and will add a touch of loctite blue when fitting. I may go one step further and drill the heads and pair wire them in as extra security.
Having been at sea for 43+years as a marine engineer and the last load of years sailing an office desk so to speak one has rather forgotten engineering basics. Now I have retired I am sure I will soon catch up.

You are absolutely right Lew.  If you have paid a Yamaha dealer, and no doubt paid em a fortune to service and MOT your bike you should not have screws winding out and falling off your bike and certainly not brake screws.

However you will now be aware of how shoddy dealer work can be, and yes you are better off looking after basic maintenance yourself, you'll do it right.

By the way I wouldn't use loctite, I do the opposite I stick a tiny smear of copper ease as things get hot down there and I wanna know I'll be able to pop my calliper off again.  I do like to use torque wrenches, but then again copper ease can render torque settings pointless so I do the brake calliper mounts by hand.  As a former marine engineer (mechanic?) I'm sure basic bike maintenance will come back easy to you.  Get a maintenance manual, plus there's loads of tutorials all over the web.

Give the dealer hell, get em to put things right, but the in the future - just don't bother with them, do it yourself.

ps don't forget the red rubber grease (another thing dealers don't do)