KTM SX150: history, specs, pictures

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Also called 144 SX, 150 SX
Production 2008 - 2019
Class Trial
single cylinder, two-stroke
Bore / Stroke 58.0mm x 54.5mm
Fuel System carburetor. mikuni tmx
Ignition kokusan ems
Transmission Gear box: 6-speed

Final Drive: chain

Clutch: multi-plate clutch, brembo hydraulics
Suspension Front: wp-usd, aer 48, ø 48 mm
Rear: wp shock absorber with linkage
Brakes Front: single disc. four-piston calipers.
Rear: single disc. two-piston calipers.
Front Tire 80/100-21
Rear Tire 100/90-19
Wheelbase 58.46 inches (1485 mm)
Seat Height 37.4 inches (950 mm)
Weight 192.24 pounds (87.2 Kg) (dry), 87.0 kg (wet)
Fuel Capacity 1.85 Gallon (7.00 Liters)
Manuals Service Manual

The KTM 150 SX was a single cylinder, two-stroke Trial motorcycle produced by KTM between 2008 and 2019.

Engine[edit | edit source]

The engine was a liquid cooled single cylinder, two-stroke. A 58.0mm bore x 54.5mm stroke result in a displacement of just 143.9 cubic centimeters.

Drive[edit | edit source]

The bike has a 6-speed transmission. Power was moderated via the multi-plate clutch, brembo hydraulics.

Chassis[edit | edit source]

It came with a 80/100-21 front tire and a 100/90-19 rear tire. Stopping was achieved via single disc. four-piston calipers. in the front and a single disc. two-piston calipers. in the rear. The front suspension was a wp-usd, aer 48, ø 48 mm while the rear was equipped with a wp shock absorber with linkage. The 150 SX was fitted with a 1.85 Gallon (7.00 Liters) fuel tank. The bike weighed just 192.24 pounds (87.2 Kg). The wheelbase was 58.46 inches (1485 mm) long.

2017 KTM 150 SX[edit | edit source]

As of model year 2017, all KTM 2-stroke models are fitted with new MIKUNI TMX carburetors, replacing the Keihin products. This 38mm flat slide carb lives to provide smooth and controllable power all the way up to the limiter. And it’s less sensitive to different altitudes and temperatures, so you can pin it wherever, whenever.