2012 KTM motocross range

KTM has officially abandoned its association with the PDS linkless rear suspension, with all its 2012 two-stroke motocross bikes to be fitted with a new linked design, one year after the four-strokes first adopted the set-up.

That’s just one of the major highlights of KTM’s 2012 SX motocross range, which also includes electric start for the 250SX-F (which weighs 1.5kg) and a new clutch for the 450 SX-F.

But the biggest news is undoubtedly the linked rear suspension on the two-strokes, which completes KTM’s weaning process from PDS – a system it steadfastly supported over number of years, even in the face of some fairly vitriolic criticism.

But now it’s all changed, with KTM claiming the linked system “provides a better solution to the increased loading demands of tough motocross tracks”.

And it continues: “Compared to PDS rear suspension, linkage has a higher rising rate, which means that when the rear wheel moves at a con¬stant rate, the rate of the shock shaft increases more than on the PDS.

“Or in other terms, if the rear wheel travels at a constant velocity, the shaft of the linkage shock is accelerating more than a PDS shock. Also the stroke of the shock is longer compared to PDS, which results in better damping characteristics and less temperature of the shock”.

Meantime, of the SX models are fitted with the latest generation 48mm USD upside-down forks with closed cartridge technology, which KTM claims creates more consistent damping characteristics in extreme situations than open cartridge systems.

The forks are also fitted with new seals and new bushings with improved Teflon coating which provides better sensitivity and durability.

The two-strokes are now fitted with the same cast aluminium swing arm as the four-strokes, which hold the linkage system underneath, whereas the PDS shock used to be connected to the top of the swingarm.

According to KTMs philosophy of design follows function, the focus in terms of bodywork was based on rider ergonomics. According to KTM, multiple world motocross champion and now the company's racing boss Stefan Everts took a key roll (sic) during the entire development process, from the first clay model until the final product. The end result -- super slim ergonomics.

Other features on the KTMs include tool-free access to the air filter, a lift handle in the rear fender, and for 2012 the rear fender features additional ‘ribs’ in order to make it stiffer when it comes to sticky heavy dirt.

As for KTM’s minicycle range, the 50 and 65 SX feature new forks, triple clamps, axles, handlebars and graphics, and the 65’s brakes have also been uprated.

The 85 SX hasn’t been left out either, with reworked suspension and brakes, and new front hub, handlebars and wheels.

The 2012 SX range will be available in the second half of 2012, with pricing to still be announced.