Based on the "Factory Edition" model used by Ryan Dungey, the 2013 450SXF is fuel injected (with a 44mm throttle body), has a different bore and stroke than last year (95mm x 63.4mm compared to 97mm x 60.8mm), a Konig bridge-boxed piston, Pankl rod and crank, and plain bearing on the big-end. The 450SXF does not have the resonance chamber that it had last year.
All of the 2013 KTM four-strokes get additional and improved fuel filters – inline, at the fuel pump and at the injector body. The European models get four-speed transmissions with 14/50 gearing, while the American models get five-speed trannies with 14/52 gearing.
The KTM 450SXF gets firmer damping front and rear, especially in the midstroke compared to previous models. The spring rate front and rear remains the same, as does the rising rate linkage.
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