Disclaimer - before you decide to bash without reading everything, skip down to the last paragraph. Hopefully you will see the point I'm making
From what I've seen with my friends' Pro-climb Cats (1100T and 800) the stock driven clutch has issues. My one buddy flew over the bars this past weekend on his 1100T when it exploded a belt while he was making a long climb up a glacier. The sled lost momentum so quickly he flew over the bars and landed in front of the sled. But, in all fairness to Cat, my buddy figured he had too much tension on the driven clutch and it got hot. My other buddy also has an HCR 1100T with a 3" 162 and he had zero belt problems and was working the sled making high marks everywhere. I recently saw another friend's Cat 800 explode a belt on flat ground at speed and it took out some plastic ramps.
Too many Cat 4-strokes.
It appears the fix is a different brand rear clutch like a Team. In any case, I agree, the Yamaha drive train is more reliable and the belts are way cheaper to boot!
I don't see Yamaha ever going back to a 2-stroke sled. That would contradict 11 years of marketing and they'd be admitting the competition had a better plan (as evidenced in overall sales, Yamaha is dead last). But, I hope they don't go back to a 2 stroke and instead continue developing the 4-strokes. If they can make them lighter and better handling, they WILL gain market share.
Got to ride the 1100T with the 3" and it was modded to make crazy power. I rode it with the dial set at 220 HP at around 3000' in knee deep powder. The power has awesome, but I already knew it would be. What I focused on was the chassis and the Cat Pro-climb HCR is much easier to throw around and sidehill than either my Vector or Nytro ever were. It felt heavy in the front compared to my RMK but that's no surprise. What I liked was how a 4-stroke sled could be manufactured and not give up a bunch in handling. The best analogy I have is a dirt bike one. Where my 600 RMK feels like a 125 or 250 2-stroke the Cat 1100T feels like an XR 600. It has lots of power, revs slowly and handles just fine but you can feel the weight. It didn't do anything weird, the ergos were comfy and it wasn't hard to get used to.
Reason I write all this is because it is exciting to think that Yamaha has had 2 seasons to test and compare the 4-stroke Cat's to their sleds and improve upon them. If they can come out with a 2014 sled that rides and feels similar to a Cat with none of the issues, they will have a winner! I hate to get my hopes up but the 2014 could possibly be the sled I thought I was buying back in 2008. It will be really interesting to see what they've come up with!