2012 KTM 50 sx, MOTOR Design 1-cylinder 2-stroke engine, water-cooled, with reed intake Displacement 49.0 cm (2.99 cu in) Bore 39.5 mm (1.555 in) Stroke 40 mm (1.57 in) Starting aid Kickstarter Gearbox Rigid 1-stage reduction gear Engine lubrication Mixture oil lubrication Primary transmission 33:61 straight cut spur gear Secondary drive ratio 11:40 Cooling Water-cooled Clutch 3-lining automatic clutch on the main shaft / centrifugal force Ignition SELETTRA 2p D36 CHASSIS Frame Central tube frame of chrome molybdenum steel tubing, powder-coated Fork WP Suspension USD 35 Shock absorber WP Suspension 3614 BAEM Suspension travel Front 205 mm (8.07 in) Suspension travel Rear 185 mm (7.28 in) Brake system Front Disc brake with four-pot brake caliper Brake system Rear Disc brake with two-pot brake caliper Brake disc diameters Front 160 mm (6.3 in) Brake disc diameters Rear 140 mm (5.51 in) Chain 1/2 x 3/16 Steering head angle 66 Wheelbase 1,032 10 mm (40.63 0.39 in) Ground clearance unloaded 252 mm (9.92 in) Seat height unloaded 684 mm (26.93 in) Weight without fuel, approx. 41.5 kg (91.5 lb.) VISIT THE OFFICIAL KTM YOUTUBE CHANNEL JOIN THE KTM RACING COMMUNITY! DEALER SEARCH FIND YOUR NEAREST KTM DEALER IMAGE VIDEO KTM - ARE YOU READY TO RACE?