I just hit the 1 year mark on my 2013 TE449 and have 1,650 miles. Yes I would buy it again. It's not plug and play, but what bike is. KTMs don't even come with skid plates so some post purchase work is required with any bike. So to prospective new owners: do your homework, read this forum, and get acquainted with this model, it is a great bike, you just have to allow it to become one.
Here is my 1 year review:
After 30 miles of break in, I took it to ZipTy to have the basic day 1 mods completed; 1) breather relocate, 2) ground wire relocate, 3) capacitor flip 4) XF coolant 5) ECU reflash, 6) smog delete and 7) suspension resprung (for me at 215lbs it's a day one mod). Since then I have added tubliss front and rear, protection (hand, skid, header, exhaust, motorsportz rear disc and 7602 rad guards), 14T front sprocket, fastway pegs, scotts damper, zipty fuel cap and purchased Danny from the forum's TXC Akro pipe. I have also added a map switch (mode A and B of #3 set), taller bars, removed the butterfly, added a stainless steel oil filter, and increased the idle slightly. From day 1 I have run 0/40 oil at 1150cc and changed the oil on average at 300 miles. Just recently I installed an EFM autoclutch and converted my clutch lever to a rear brake (and removed the foot brake set up).
My bike has been completely trouble free. It has always started right up cold. Before increasing my idle slightly, it would be more difficult to start hot (I'd have to use some throttle) but now it starts trouble free both cold and hot. Transmission has been trouble free. Clutch has worked perfectly (operator has not). No throttle sticking, no dead throttle. Had some flame out issues before the map re-flash to set #3 but has been fine since. I have surely stalled it, but not a flame out as in blipping the throttle and it just dies. I have not had any oil in the airbox, no blowing oil, no gas boiling, no surging, no engine running issues at all. My suspension pivots and bearings are intact and all still full of grease. No overheating or running hot. Just stone cold reliability.
Pros:
Reliability
Cost
Fit (I am a bigger guy at 6'4")
Components
CTS system (climbing, especially techy rocky climbs)
Clutch feel
Brakes
Uniqueness (I get annoyed with the KTM fan boys)
Cons:
Transmission ratio spread (too high 1st, too low 6th)
Aftermarket support and product limitation
Crankcase width (clutch sticks out too far and will limit fitting between tight boulders)
Two tank fuel system
Fuel cap
Brake pedal
Regarding the "innovation" on this bike. My thought is they seem to gain an advantage in one area and lose an advantage in another. Example: CTS. Works great, really hooks up, but makes the bike wider. Clutch on the crank: clutch engagement feels great, seems to take a ton of abuse, but makes the crankcase too wide so the brake pedal will catch on rocks and the clutch cover is vulnerable. Mass centralization: feels good while underway, the air filter seems to stay cleaner and I like being able to slide all the way forward on the seat, but you have two gas tanks (can be slow to fill in race situation), a filling location that can be susceptible to dirt and debris finding its way into the tank, and a terrible OEM gas cap.
I feel similarly to others in the forum where I wish this bike had some more evolution because it's a different angle and it mixes things up a bit in a good way. It's a shame that a few simple things can prevent owner satisfaction, and perhaps proliferate a negative reputation, along with some "industry experts". I like my 449 and it has worked very well for me so far.