this has the best write-up of Gen 2 changes I've seen, basically heads, cyclinders, ports, bars, dash, cruise etc.:
http://www.sportrider.com/bikes/2014-yamaha-super-tenere-first-ride-review
Unlike team Red, Yamaha actually seems to listen to their customers and offer updates on a regular basis.
The S10 is not a huge seller but then again neither is the FJR and I believe they are on Gen. 3 with that
one now. As Gen. 2 for the S10 was in 2014, I would expect Gen 3 to be in 2017 at the earliest. ADV
bikes are still growing in market share and Yamaha would likely want a bigger slice of that so that might
argue for sooner vs. later in the 3-5 yr. refresh cycle. Personally, there is not a lot I would change
but I would expect more electronica....