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KTM 450 SX

 The KTM 450 SX-F is the Austrian company’s most advanced motocross bike. The 450 SX is the only MX dirt bike from the Big Five which utilizes electric start. This advantage for the KTM 450 SX-F is only possible because the MX bike is still able to be lightweight.

The 10 KTM 450 SX-F ranks right up with the best from Japan.
KTM made sure it's Thumper felt small by squeezing the 449cc powerplant into the 250SX chassis.
KTM is known for its unique form of suspension. White Power makes the fork and shock. The WP shock does not use linkage and attaches directly to the swingarm. The 450 SX-F is known for its strong DOHC engine and amazing wave rotor brakes. It’s also the only major brand which still uses a four-speed transmission.

Stefan Everts works with the Factory KTM team in Europe where he tests and trains on the KTM 450. The Austrian OEM is far more popular over there than it is in America. The KTM 450 SXF hasn’t had the same levels of professional motocross and supercross success in the U.S. as the Japanese brands, but the orange company dominates the off-road enduro market. Bigger models such as the 505 and 530 KTM dirt bikes share some components with the 450 SX-F and a 400 does as well.

With the 450 MX class and MX1 GP motocross racing being the most prominent form of MX racing, the KTM 450 SX-F is at the forefront of KTM motorcycle development. Much of the technology from the 450 will get passed on to other KTM dirt bikes.
KTM 450 SX Motorcycle Reviews
2010 KTM 450 SX-F Comparison
Friday, January 01, 2010
MotoUSA rounds up four of the best open-class motocross bikes on the planet from Honda, Yamaha, Kawasaki and KTM for our 2010 450 Motocross Comparison.
2010 KTM 450 SX-F First Ride
Wednesday, October 14, 2009
The 2010 KTM 450 SX-F comes to take on all big-bore motocross challengers. We sample the 450 SX-F dirt bike at two different SoCal motocross tracks for an introduction to the big Orange MX bike.
2003 KTM 450SX Comparison
Friday, February 28, 2003
The 2003 crop of 4-strokes is by far the best set of performance thumpers we've ever test...maybe even the best bikes?
KTM 450 SX First Looks
2011 KTM Motocross Lineup First Look
Tuesday, May 18, 2010
KTM introduces the 2011 SX-F 4-stroke and SX 2-stroke motocross bikes, including the all-new, radical 350 SX-F. The 2011 model year brings big changes to the Austrian lineup.
2008 KTM Motocross First Look
Tuesday, June 26, 2007
Nothing radical highlights the release of 2008 motocross bikes, but the Austrian manufacturer has made updates to most of the high-profile MXers in the lineup.