Days before the start of the 2012 AMA Supercross season and Ryan Dungey’s debut on the 450 SX-F, KTM has unveiled the production version of the motocrosser featuring a new engine and chassis.
The 2012 KTM 450 SX-F Factory Edition is equipped with a fuel-injected 449cc four-stroke engine paired with a five-speed transmission. The new engine has a 95mm bore and a 63.4mm stroke, compared to the previous version’s 97mm x 60.8mm engine.
KTM has signed Ryan Dungey to a two-year contract to race in the 2012-2013 AMA Supercross and Motocross seasons. The deal reunites Dungey with team manager and motocross icon Roger DeCoster.
Dungey and DeCoster share a connection that goes back to 2006 when the former world champion recruited Dungey for the Suzuki factory racing team. Under DeCoster’s tutelage, Dungey swept the 2009 AMA Supercross Lites West and 250cc Motocross championships. The following season, Dungey moved up to the 450cc class and again won both the Supercross and Motocross titles.
