FIRST LOOK! KTM’S 2012 TWO-STROKE MOTOCROSS MINICYCLES: WHILE OTHER MANUFACTURERS BACK OFF, KTM KICKS OUT THE JAMS


2012 KTM 50SX

A real KTM for the smallest of future MX champions from the age of three or four years. The 40 kg (88 lb.) lightweight 50 SX sets standards in terms of safety, controllability and riding fun. It has everything that impresses riders up to height of 1.30 m (4.27 ft) and reassures their parents: a high-quality chassis with easily applied disc brakes, top-quality components wherever you look, a powerful, reliable engine with easy-to-operate centrifugal clutch. There is also a smaller version available called the 50SX Mini.

KTM 50SX SPECS
Engine type: Single cylinder, 2-stroke
Displacement: 49 cc
Bore/stroke: 39.5 x 40 mm
Starter: Kickstarter
Carburetor: Dell’Orto PHBG 19 BS
Lubrication: Mixture lubrication 1:60
Transmission: Single gear automatic
Gear ratios: 14:31
Primary ratio: 61:33
Final drive: 11:40
Cooling: Liquid cooling
Clutch: Centrifugal clutch (adjustable)
Ignition: Selettra 2p D36

Handlebar: Renthal, Aluminium ? 22 mm
Front suspension: WP Upside-Down ? 35 mm
Rear suspension: WP mono shock
Front brake: Disc brake ? 160 mm
Rear brake: Disc brake ? 140 mm
Front/rear rims: 1.50 x 12″; 1.60 x 10″ Alu
Front/rear tires: 60/100 x 12″; 2.75 x 10″
Steering head angle: 66ø

2012 KTM 65SX

The KTM 65 SX is just the right sports machine for all up-and-coming riders from 8 to 12 years of age and up to a height of about 1.60 m (5.25 ft). With a six-speed transmission, generous suspension travel and high-quality components, the mini-crosser provides everything necessary for having plenty of fun and laying the foundations for a promising MX career. Its unrivalled peak power and fully-adjustable suspension components reinforce its claim to pole position.

KTM 65SX SPECS
Engine type: Single cylinder, 2-stroke
Displacement: 64.9 cc
Bore/stroke: 45 x 40.8 mm
Starter: Kickstarter
Carburetor: Mikuni VM 24
Control: Slide valve, exhaust gas pressure dependent
Lubrication: Mixture lubrication 1:60
Transmission: 6 gears
Gear ratios: 13:37, 16:34, 18:31, 21:30, 23:28, 24:26
Primary ratio: 23:75
Final drive: 14:48
Cooling: Liquid cooling
Clutch: Wet multi-disc clutch, hydraulically operated
Ignition: AET digital

Handlebar: Renthal, Aluminium ? 22 mm
Front suspension: WP Upside-Down ? 35 mm
Rear suspension: WP mono shock
Front brake: Disc brake ? 198 mm
Rear brake: Disc brake ? 160 mm
Front/rear rims: 1.60 x 14″; 1.60 x 12″ Alu
Front/rear tires: 60/100 x 14″; 80/100 x 12″
Steering head angle: 64.5ø

2012 KTM 85SX

No absolute beginners are to be found tooling around among the ranks of ambitious, young MX riders any more. This is where future champions fight for victory and the best chance for a place on the podium is on the 85 SX – as demonstrated convincingly by Henry Jacobi’s 2010 world championship title. The 85 SX masters the toughest MX tracks with unperturbed ease. The grown-up KTM mini-crosser combines fully-fledged MX technology with perfect controllability. It is also available as a Big Wheel with 19″ and 17″ wheels instead of 17′ and 14″ wheels.

KTM 85SX SPECS
Engine type: Single cylinder, 2-stroke
Displacement: 84.9 cc
Bore/stroke: 47 x 48.95 mm
Starter: Kickstarter
Carburetor: Keihin PWK 28
Control: Rotation speed dependent exhaust flap
Lubrication: Mixture lubrication 1:40
Transmission: 6 gears
Gear ratios: 11:29, 14:28, 16:26, 19:26, 21:25, 20:21
Primary ratio: 19:66
Final drive: 14:46
Cooling: Liquid cooling
Clutch: Wet multi-disc clutch, hydraulically operated
Ignition: Moric digital 2M1

Handlebar: Renthal, Aluminium ? 22 mm
Front suspension: WP Upside-Down ? 43 mm
Rear suspension: WP-PDS mono shock
Front brake: Disc brake ? 220 mm
Rear brake: Disc brake ? 210 mm
Front/rear rims: 1.40 x 17″; 1.60 x 14″
Front/rear tires: 70/100 x 17″; 90/100 x 14″
Steering head angle: 66ø

Photos: H. Mitterbauer & A. Barbanti

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