2013 KTM 450SXF: The Austrians keep
popping out new models, engines and
updates. The 450SXF is even updated
from the mid-season Dungey Replica.
Q: WHAT IS THE MOST SIGNIFICANT FEATURE OF THE 2013 KTM 450SXF? A: Horsepower. The 2013 KTM 450SXF blows the 2012 model out of the water from the middle on up. In fact, it makes more power than the Ryan Dungey Replica, which was only introduced six months ago. Oh yeah, it also makes more power than any other 450cc motocross bike. Q: HOW DOES THE 2013 450SXF RUN ON THE DYNO? A: Of all the production bikes we have ever dynoed, the 2013 KTM 450SXF makes the most peak horsepower— by a big margin. Last year’s 2012 Kawasaki KX450F pre- viously held the record at 55. 50 horsepower (the 2013 KX450F is actually less powerful at 55.05). The 2013 KTM 450SXF erases all the records with a startling 56. 95 horsepower. You read that right—the 2013 KTM is a hair shy of 57 horsepower. Q: IS THE 2013 KTM 450SXF TOO POWERFUL? A: You’d think so, wouldn’t you? But you’d be wrong. The power delivery of the KTM 450SXF has two stages. It comes on very soft off idle, and around 6000 rpm it is no different from the KX-F, RM-Z or YZ-F. It has pleasant roll-on power. It doesn’t scare you, hit abruptly, upset the chassis or feel very impressive. At 7000 rpm, it is still pulling smoothly and everything seems normal. When you are in the saddle, you don’t notice that the KTM 450SXF is making one horsepower more at 7000 rpm than any other 2013 bike. Then, around 8000 rpm, you begin to notice that the KTM is going pretty darn fast. At 9200 rpm, when the other brands begin to fall off the pipe, the KTM has come on the cam and is really beginning to build a head of steam. It is fast in a deceptive way. It reaches peak horsepower at 9400 rpm where it is making 1-1/2 horsepower more than the KX450F. And, as the other 450s start to drop precipitously at 10,000 rpm, the KTM makes four horses more than the KX450F, at 10,500 rpm the 2013 KTM 450SXF has 5-1/2 horses more than the KX-F, and at 11 grand the KTM has a six-horse advantage. This is the most powerful 450cc motocross bike made. That is something to crow about. It is, however, a slow- feeling 450cc bike from idle to the midrange. Q: HOW FAST IS THE 2013 KTM 450SXF ON THE TRACK? A: This is a very deceiving engine. Since it starts out mellow and builds its power with rheostat consistency, it never really feels fast. It doesn’t jerk your arms out of their sockets or make your eyes water. It’s fast but mellow. It tricks you into going fast by making it seem