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KTM ATV Model Info


KTM ATV Model MFG logo

KTM Introduces 2009 450SX & 505SX Motocross ATVs

KTM 450 SX ATV

KTM 450 SX ATV

Ohio (5/29/2008) - The KTM 450 SX and 505 SX Sport ATV‘s were built with one thing in mind: motocross.

Ready-to-Race, these motocross sport ATVs feature the most powerful engines and sophisticated suspension elements in the industry.

High performance, great handling, supreme quality and styling are what make the new KTM 450 SX and 505 SX race machines the most desirable on the market.

KTM 450 SX ATV Engine

KTM 505 SX ATV Engine

  • 449cc DOHC 4-valve liquid cooled
  • Bore 97mm, Stroke 60.8mm
  • Compression Ratio 12.5:1
  • Electric start w/ hot start
  • 477cc DOHC 4-valve liquid cooled
  • Bore 100mm, Stroke 60.8mm
  • Compression Ratio 12.5:1
  • Electric start w/ hot start

KTM 505SX ATV KTM 450 SX Motocross ATV

KTM 505SX ATV

KTM 450SX ATV


Engines are based off the 450 SX-F dirt bike engine:

  • Engine Cases
    ~Re-designed engine cases with modified engine ventilation system.
    ~Accommodates a deep oil sump allowing better engine performance and increased oil capacity.
  • Transmission
    ~Close ratio 5-speed transmission
    ~Provides the right gear for all track conditions. No reverse.
  • Cylinder Head
    ~Engine design offers 4-valve and DOHC.
    ~Excellent power band and high performance output
  • Carburetor
    ~Keihin FCR-MX 41mm flat slide carb with acceleration pump and TPS.
    ~Ultra responsive and easy to tune.

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