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2026 KTM 125 SX

2026 KTM 125 SX

The 2026 KTM 125 SX sets the benchmark for 2-stroke motocross performance. Designed for riders who crave lightweight handling and explosive power, it features an advanced fuel-injected engine, WP XACT suspension, and a perfectly balanced steel frame. Whether you’re training or racing, this is the ultimate entry point into KTM’s championship-winning SX range.
$15,139.00 NZD
$15,139.00 NZD
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The 124.8 cc single-cylinder engine combines traditional 2-stroke excitement with modern fuel injection. With Keihin EFI and a 6-speed gearbox, it delivers crisp throttle response and precise power delivery across the rev range.

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The lightweight 25CrMo4 steel double-cradle frame and aluminum-reinforced subframe ensure stability and strength. WP XACT 48 mm AER forks and a WP XACT rear monoshock with linkage provide 310 mm and 300 mm of travel, fully adjustable for compression and rebound.

Weighing only 92 kg, the 125 SX offers unmatched maneuverability and control. Brembo hydraulic brakes, a 7.2 L fuel tank, and 359 mm of ground clearance make it ready to perform on any motocross circuit.

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KTM 125 SX (2026) — Specifications
Specification Detail
Engine
Design 1-cylinder, 2-stroke engine
Displacement 124.8 cm³
Transmission 6-speed
Fuel System Keihin EFI, 39 mm throttle body
EMS Vitesco Technologies EMS
Clutch Primary Drive Teeth 73
Primary Drive 23:73
Clutch Type OS multi-disc wet clutch
Clutch Operation Brembo hydraulics
Engine Cylinder Single cylinder
Engine Stroke 2-stroke
Chassis
Frame Design Central double-cradle-type 25CrMo4 steel
Front Brake Disc brake
Rear Brake Disc brake
Rear Subframe Design Aluminum-reinforced polyamide
Chain 520, non-sealed
Suspension
Front Suspension WP XACT-USD (AER), 48 mm
Rear Suspension WP XACT Monoshock with linkage
Suspension Travel (Front) 310 mm
Suspension Travel (Rear) 300 mm
Front Suspension Adjustment Compression (high and low speed), rebound
Rear Suspension Setting Compression and rebound adjustable
Dimensions
Seat Height 958 mm
Ground Clearance 359 mm
Tank Capacity (Approx.) 7.2 L
Weight (Without Fuel) 92 kg