There comes a point in time when you just need to get an ATV that works on all corners. In these instances, you can’t do any better than the KTM 505 SX.

The Motocross-Quad 505 SX is a thoroughbred racing machine and uncompromisingly designed to be as great as KTM’s line of MX motorcycles. Every single detail of the 505 SX has been meticulously designed, from the elaborate ergonomics to the multi-adjustable chassis and the extraordinary pull of the engine.

The backbone of the 505 SX’s unrivaled low weight of only 165 kg/363 lbs makes for an extremely light ATV. Combine that with an exceptionally robust frame made from high-strength, powder-coated chrome-molybdenum steel with a bolted on light-alloy rear end and double-butted rear axle made from high-strength steel, and you have a machine that’s built to be as tough an durable as any ATV on the market today.

More than just its sturdy design, the 505 SX is also the picture of exceptional performance, thanks in large part to its 477cc iquid-cooled, DOHC, four-stroke, single-cylinder engine that brings its sensational power to bear on the rear wheels via a hydraulic clutch and close-ratio five-speed transmission. In conjunction with low vehicle weight and the low center of gravity, the powerful DOHC racing engine ensures exceptional performance on every track.

The ATV’s suspension set-up also demonstrates just how impressive of a ride the 505 SX really is. Whether it be the WP suspension components, the Magura hydraulics, Nerf bars, tether switch, DWT Beadlock light-alloy wheels on the rear axle, or Maxxis cross tires all round, the 505 SX is equipped with a plethora of features that makes ATV racing as safe and as fun as it really is.

Find out more about the KTM 505 SX after the jump.

  • 2012 KTM 505 SX
  • Year:
  • Make:
  • Model:
  • Engine:
    Single cylinder, four-stroke
  • Energy:
    Carburettor. Keihin FCR MX 39
  • Displacement:
    477 cc


2012 KTM 505 SX High Resolution Exterior
- image 436836

The 505 SX’s liquid-cooled, DOHC, four-stroke, single-cylinder engine brings its sensational power to bear on the rear wheels via a hydraulic clutch and close-ratio five-speed transmission. The powerful single makes light of the MX quad’s extremely low weight - and hence the same of the competition.


2012 KTM 505 SX High Resolution Exterior
- image 436840

Tough MX race use demands top-quality brakes. At the front of the 505 SX, four-piston fixed-caliper brakes from Magura, unique in the ATV world, bite hard into two huge wave discs. Braided steel brake lines all round also come as standard.


2012 KTM 505 SX Exterior
- image 436839

Camber and caster on the front axle of the 505 SX are just as variable as the track on the rear. Not only the spring preload plus compression and rebound damping are adjustable on the shock absorbers, they also feature separate high-speed and low-speed settings for the compression stage.


2012 KTM 505 SX Exterior
- image 436844
Engine type Single cylinder, 4-stroke
Displacement 477.5 cc
Bore/stroke 100/60.8 mm
Compression ratio 12.5:1
Starter / Battery Electric starter / 12V 4Ah
Carburetor 41 mm Keihin MX-FCR with TPS
Control 4 valves, DOHC
Lubrication Dry sump, pressure lubrication with 3 Eaton pumps
Transmission 5 gears
Gear ratios 16:34 19:31 20:26 23:25 26:24 -
Primary ratio 26:78
Final drive 14:38
Cooling Liquid cooling
Clutch Wet-multi-disc clutch, operated hydraulically
Ignition Kokusan digital
Frame Double cradle of chromium molybdenum steel tubes, powder-coated
Subframe Aluminium
Handlebar Magura, Aluminium, tapered, Ø 28 mm
Front suspension WP, fully adjustable, single wheel suspension with double transverse control arm
Rear suspension WP, fully adjustable, rigid axle
Suspension travel front/rear 244/258 mm
Front brake Magura 4-piston with fixed brake caliper x 2, 180 mm disc and Stahlflex brake lines x 2
Rear brake Magura 1-piston with floating brake caliper, 200 mm disc
Front/rear rims 5x10" / 8x8" DWT Al 6061
Front/rear tires 20"x6.0"-10" / 18"x10.0"-8"
Chain 5/8 x 1/4"
Silencer Aluminum
Length / width / height 1,810 / 1,265 / 1,100 mm
Wheel base 1,280 mm ± 10 mm
Front/rear toe width 1,265/1,265 mm
Ground clearance 265 mm
Seat height 795 mm
Tank capacity ca. 10.3 Liter
Weight (ready to race) approx. 165 kg (without fuel)


ATV----"In keeping with KTMs race-ready philosophy, these front brakes are easily serviced and cleaned. The front brake pads can be removed in a matter of moments using nothing more than a pair of needle nose pliers. For the rear Magura has provided a single-piston floating calliper with a larger 200 mm disc and an integrated reservoir and master cylinder. "

Bikez----"The Motocross-Quad 505 SX is a thoroughbred racing machine and just as uncompromisingly designed for victory as the MX motorcycles from KTM. Every single detail takes account of this requirement, from the elaborate ergonomics to the multi-adjustable chassis."

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