The 2011 has the new tensioner.
A couple weeks ago I removed the silver access cover and I see we do not have the jump guard, so I'll add that this winter or spring.
We had 03 K1200RS's before the 1300S's and liked those, but with the big weight savings on the 1300S we think these are much better. And more power doesn't hurt
The 1300S remindes us of our old K75s's on steroids.