ktm 125 sx 2026

The 2026 KTM 125 SX remains a powerhouse in the 125cc class, engineered specifically for riders who value agility and high-revving performance. At its heart lies a 124.8 cm³ 1-cylinder, 2-stroke engine with a nearly square bore and stroke of 54 mm × 54.5 mm, optimized for a sharp power delivery. While many modern bikes have moved to electric starts, the 125 SX stays true to its racing roots with a reliable kick starter, keeping the overall weight to a remarkably lean 87.5 kg (without fuel).

To handle that power, the bike is equipped with a high-performance multi-disc clutch and Brembo hydraulics, ensuring precise modulation and durability under race conditions. The chassis is equally aggressive, featuring a steering head angle of 63.9° for razor-sharp cornering. With a towering 950 mm seat height and a massive 375 mm of ground clearance, this machine is built to swallow deep ruts and massive jumps. It’s rounded out with a 7.5-liter fuel capacity and a rugged 5/8 × 1/4" chain, making it a formidable, track-ready weapon for the 2026 season.