2012 KTM 125 SX Single cylinder, 2-stroke 124.8cc 54 mm x 54.5 mm NA Liquid-Cooled Keihin PWK 8S AG Kokusan Kickstarter six gears 1 : 50 NA 58.26 in. 9.05 in. WP-USD, Closed Cartridge, 48 mm WP-Monoshock with linkage Disc brake 260 mm Disc brake 220 mm 80/100-21quot; 100/90-19quot; 1.87 gal. 200.17lbs.