Hi, re the yamaha side cases.....
My key snapped in the lock on the first trip and in the first week. That was nearly a month ago and I'm still waiting for the second fix as the first failed and didn't make it out of the dealers.
My view is a set of soft bags or a Givi set would have been a better alternative given the price and availability af the other aluminium cases.
My view is yamaha have got quite a bit of work to do before their boxes can be taken as serious contenders for the type of riding the tenere is meant for.
Think carefully before splashing the cash on the Yamaha kit.

still waiting!