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2004 KTM Sportminicycles - 50 SX Pro Junior

KTM 50 SX Pro Junior

The sportminicycles for the first competition experiences. And of course for the first victory. For mini-champions ages 5 to 8. With Marzocchi racing fork, WP central shock, and liquid cooled racing sport engine with automatic transmission. Seat height from 585 mm.

In the KTM Sportminicycle program, the 50 SX pro series with liquid-cooling offers a true Motocross sport motorcycle in small format for young pros. Both models are equipped with a WP shock absorber with improved sealing, a new crankshaft and a new water pump shaft for increased durability. 2004 all 50 SX Pro Junior LC models come with thicker, more reliable rear wheel spokes.

Rear disc brakes replace drums of the 50 SX Pro Senior LC and therefore adapted new frame. Foot brake-cylinder with an integrated reservoir and dual-piston rear brake calliper. Stronger swing arm axle enlarged from 10 mm to 12 mm with needle bearing instead of bushings offer more stability and less maintenance.

  • Engine - Type single cylinder, 2-stroke
  • Displacement (cc) - 49
  • Bore x stroke (mm) - 39.5 x 40
  • Starter - Kick-starter
  • Carburetor - Dell'Orto PHVA 14 DS
  • Engine lubrication - mixture lubrication
  • Primary drive - 16:57
  • Final drive chain - 1/2 x 3/16" 96 R
  • Cooling - liquid cooled
  • Clutch - centrifugal clutch (adjustable)
  • Ignition - Selettra
  • Frame - central double-cradle-type frame
  • Handlebar - Alu D22
  • Front suspension - Marzocchi 32 mm
  • Rear suspension - WP monoshock
  • Suspension travel - front / rear 140/205 mm
  • Front brake - disc brake 160 mm
  • Rear brake - drum brake 90 mm
  • Front / rear rim - 1,6 x 10"; 1,6 x 10"
  • Front / rear tyre - 2,50 x 10"; 2,75 x 10"
  • Transmission ratio - 11:48
  • Main silencer - Aluminum
  • Steering head angle - 24
  • Wheel caster - 68.7 mm
  • Wheel base - 910 mm
  • Ground clearance (unloaded) - 220 mm
  • Seat height - 585/610 mm (adjustable)
  • Fuel capacity - approx. 1.8 liters
  • Weight (ready to race, no fuel) approx. - 37.6 kgs