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KTM 125 SX 2019

Engine & Exhaust

The latest version of the 125 SX engine is once again the most competitive and powerful engine in its class. With an outstanding power-to-weight ratio, low cost and overall simplicity, it is clear that 2-strokes will continue to have a successful future at KTM. The compact and durable 17.2 kg engine was developed using the latest KTM engineering know-how, resulting in broad power across the rev range. Its easy rideability and outstanding performance are benefits that equate to faster lap times and better results.

Cylinder

Crankcases and engine covers

Transmission

Carburetor

Ignition

Factory spark plug

150 Factory kit

Factory piston

Exhaust

Exhaust

CNC-parts

Factory control cover

Outer clutch cover

Oil plug

Water pump cover