2025 KTM 125 SX

$7,199.00
$8,199.00 $7,199.00
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Plus Destination: $650

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2025 KTM 125 SX - THE SAN DIEGO STARTING LINE LEGEND

The 2025 KTM 125 SX isn’t just for beginners - it’s for those with lightning reflexes and fearless drive. In San Diego’s competitive motocross scene, this two-stroke rocket is your launch pad into pro-level performance. Whether you're carving lines at Barona or chasing holeshots at Pala, the 125 SX is engineered to sharpen your skills and fuel your fight for the podium.

Lightweight, aggressive, and precision-engineered, this model comes packed with modern upgrades like EFI, an electric starter, and a re-tuned chassis that makes navigating technical tracks more intuitive than ever. Its high-revving engine delivers that signature 125 bark, while its race-proven frame and WP suspension offer unmatched control when the pace gets brutal.

For Southern California riders with serious ambition, the 2025 KTM 125 SX is the perfect platform to grow speed, control, and confidence - one gear-shift at a time.

UNIT SPECS

Engine

  • Transmission: 6-speed
  • Starter: Electric starter
  • Stroke: 54.5 mm
  • Bore: 54 mm
  • Clutch: Wet, DDS multi-disc clutch, Brembo hydraulics
  • Displacement: 124.8 cm³
  • EMS: Vitesco Technologies EMS
  • Design: 1-cylinder, 2-stroke engine
  • Fuel System: Keihin EFI, 39 mm throttle body

Chassis

  • Weight (without fuel): 91.9 kg
  • Tank Capacity (approx.): 7.2 l
  • Wheelbase: 1,485 mm ± 10 mm
  • Front Brake Disc Diameter: 260 mm
  • Rear Brake Disc Diameter: 220 mm
  • Front Brake: Disc brake
  • Rear Brake: Disc brake
  • Chain: 520, non-sealed
  • Frame Design: Central double-cradle-type 25CrMo4 steel
  • Front Suspension: WP XACT-USD (AER), Ø 48 mm
  • Ground Clearance: 359 mm
  • Handlebar: Neken, aluminum Ø 28/22 mm
  • Rear Suspension: WP XACT Monoshock with linkage
  • Seat Height: 958 mm
  • Silencer: Aluminum
  • Steering Head

FEATURES

  • POWERFUL 125 CC EFI ENGINE: The 2-stroke motor features Keihin EFI with a 39 mm throttle body, offering razor-sharp throttle response and consistent power across all altitudes and riding conditions.
  • ELECTRIC STARTER: Say goodbye to kickstarts. The 125 SX features a compact electric starter and lithium-ion battery for fast restarts during high-pressure moto moments.
  • WP XACT SUSPENSION: Equipped with 48 mm AER front forks and a fully adjustable WP XACT rear shock, this suspension system is tuned for precision and performance on aggressive motocross terrain.
  • LIGHTWEIGHT CHASSIS: The laser-cut, hydro-formed steel frame is optimized for ideal flex and rigidity, giving riders improved handling and feel over rough surfaces and jumps.
  • ERGONOMIC BODYWORK: Sleek radiator shrouds and a flat seat profile give riders increased mobility and control, especially when shifting weight through corners or over jumps.
  • ADVANCED MASS CENTRALIZATION: The compact engine and repositioned components contribute to superior agility and flickability — ideal for tight turns and technical sections.
  • PREMIUM COMPONENTS: From the Brembo hydraulic clutch to the aluminum subframe and high-end footpegs, every detail is race-ready and competition-proven.
  • READY TO RACE: Lightweight, sharp, and relentless — the 2025 KTM 125 SX brings full-sized race tech to the small-bore category with zero compromises.

See TERMS for details. Plus government fees and taxes, any finance charges, dealer document processing charges, electronic filing fees, emission testing charges, and freight. All sale prices include applicable factory incentives. Availability may vary. Some items may not be in immediate dealer stock and may require ordering. Estimated order time ranges from 1 to 90 days. Please see terms for full details. Please call to confirm availability.