Had my first ride on the bike today...finally! The area I rode is in eastern Washington and offers just about every type of terrain with the exception of rooted woods. Have some dialing in to do...mostly suspension (rear suspension in particular) but I have to say that this bike rips.
Coming off an '08 YZ450 that is perfectly set up for offroading (FWW, Rekluse, 18" rear wheel, tuned suspension, BRP riser/submount with Scotts damper) I have to say that this bike is way different and way better.
Reading through this forum I have seen lots of complaints about an overly touchy throttle and too-light front end. All I can say to this is: Really?
This thing carves through ravines like a 250, I can dive into tighter lines mid-corner, freaking rails through whoops and high speed chop (the faster the better). Light front end? The front end bites better than any '06-'09 that I have ever ridden. On steep hill climbs the front end was not unusually willing to come up (turns out there is a lever on the left handlebar that helps with that kind of stuff). Having a bike that is too willing to turn is a nice problem to have BTW.
Yes, the fuel injected motor is very sensitive to small throttle modulations at low RPM, but as it turns out there is a lever on the left handlebar that helps with that kind of stuff. Yes, I will put a FWW weight on it, yes, I am going to change the mapping to smooth it out...but just a little. At this point I see no reason to ship the throttle body somehwere to de-sensitize this badass motor.
The only major complaint I have with the bike is the rear suspension. In rocky or hacked terrain the back wheel was all over the place. That said, my sag is set at 90mm...once I lower it to 110mm it may be a little better. Also, I have not laced up an 18" rear wheel yet and the 19" still has the stock tube (not HD or UHD) so I was concerned with pinch flatting and was running higher air pressure than I normally do with an 18" and UHD tube I was running 16psi when I usually run 10-12psi. Still, for offroading I plan on sending the suspension off to TBT and have them work their magic.
Overall I think this bike is a badass platform for creating a sweet offroad machine.
On a side note, I installed the Rekluse zStart Pro that was in my '08 (and my '06 before that) into the '13 and it works flawlessly.