For 2012, KTM has upgraded its full line of SX motocrossers, especially the two-strokes which now get linkage rear suspension, while the SX-F four-strokes take on fewer changes.
Perhaps the biggest news from the four-stroke line is the addition of electric-starting on the KTM 250 SX-F. Both the 350 and 250 Fs receive new mapping, while the 450 SX-F gets a new clutch and new clutch master cylinder.
All of the SX-F four-strokes are now fitted with Dunlop MX51 rubber. The SX two-strokes, however, are fitted with Pirelli Scorpion MX tires.
As mentioned, the two-stroke SX feature a number of changes, including going to a linkage rear-suspension system. To accommodate the all-new rear suspension and linkages, all of the two-stroke SXs have a new frame, WP shock and revamped suspension settings. The one piece cast aluminum swingarm is also new.
The SXs also get a new head-stay and intake boot.
The 125 and 150 SX models are fitted with new kickstarters, while the 150 also gets a new exhaust pipe.
The 250 SX features a new V-Force reed block.
Bodywork has also been changed on the SXs, as they now feature a new white airbox and new white, restyled rear fender, which is said to be stronger, too. Bar pads are new, as are the 450 SX-F's fork guards, which come with a holeshot device.