introduced the 300 RX motocross bike with a 19" rear wheel and other enhancements geared to the MX market. They also entered 2021 and 2022 MXGP series with a new 450 RX. Enduro models 2004 - 2009 KTM Motors Introduced in 2004 the chrome-moly framed enduro bikes (with KTM 250, 400, 450, 525 RFS motors) came equipped with Nissin brakes and rotors, Marzocchi forks, and a Sachs rear shock. For 2007 the RR models were upgraded with a removable clutch sub-cover, upgraded front fork settings, and a redesigned rear swing arm. 2008 introduced the RS models built for the American market. The RS model is the street legal version of the RR model and came in 400cc, 450cc and 525cc versions. 2009 saw the introduction of the first "Factory" or Race editions. The race edition included upgrades such as a titanium exhaust, Marzocchi closed cartridge forks, billet triple clamps and a carbon fiber skid plate. 2009 was the last year of the KTM motors. 2010 - 2014 1st gen Beta Motors Starting in 2010 in-house designed carburated motors appeared in their enduro bikes. All 400cc, 450cc and 520cc (actually 498cc) four-strokes have DOHC, separate engine and transmission lubricants, Nissin brakes, Brembo hydraulic clutches, Excel Takasago rims and six-speed gear boxes. 2011 saw the introduction of the in-house motors in the RS (dual-sport) models and introduced the 350cc motor. RS bikes have slightly different frame geometry resulting shorter wheelbases (58.1 vs 58.7 for RRs) and lower seat heights (36.6 vs 36.8 for RRs). All RS dual-sport bikes sold in the USA come standard with the TrailTech Voyager GPS. The 2012 motors were available in 350, 400, 450, and 498cc. 2012 also saw the introduction of the Sachs forks and rear shock on the RR models. A 2012 only cross country version of the 450 was offered with Marzocchi closed cartridge forks and a Sachs rear shock with a special link for longer travel. 2013 saw the introduction of the 300RR 2-stroke sporting Marzocchi closed cartridge forks and a Sachs rear shock. The 350 RS sported 45mm Marzocchi USD forks. 2014 saw the addition of a 250cc motor to the RR 2-stroke line. The 2014 "Race Edition" bikes made use of 48mm Marcocchi closed cartridge forks. 2015 - 2019 Perfect Displacement Motors 2015 saw the introduction of new engine displacements. The 350 remained the same. The 400 was reduced to 390, the