When the next step up is into the 50cc class, there is no better option than the most powerful 50cc out there. For 2025, the KTM 50 SX is built around an advanced steel frame, housing a powerful engine, a 35mm WP XACT AER fork, a WP XACT monoshock, and an advanced hydraulic Formula brake system. Simply put – it’s the most advanced and READY TO RACE 50 cc mini-crosser available to your little racer.
Key Specifications
Engine Type
1-cylinder, 2-stroke engine
Engine Capacity
49.9 cc
Max Power
n/a
Max Torque
n/a
Top Speed
n/a
Fuel Tank Capacity
2.3 L / 0.6 US gallons
Weight (Wet/Kerb)
~ 45.7 kg / 100.7 lbs
Seat Height
634 mm / 24.96 inches to 683 mm / 26.88 inches
*n/a – information not provided by manufacturer
All Specifications
Make & Model
Model
KTM 50 SX
Year
2025
Engine
Engine Type
1-cylinder, 2-stroke engine
Displacement
49.9 cc
Bore x Stroke
39.5 x 40.7 mm
Number of Cylinders
1
Max Horsepower
n/a
Max Torque
n/a
Engine Management System
Seletra 2p D36
Fuel-mixture System
Dell’Orto PHBG 19 BS
Ignition System
Kick Starter
Fuel
Super Unleaded (ROZ 95)
Performance
Top Speed
n/a
Acceleration (0-100 km/h, 0-60 mph)
n/a
*n/a – information not provided by manufacturer
Transmission
Clutch
Multi-disc centrifugal force clutch
Gearbox
Single-speed automatic
Transmission Ratio
14:31
Final Drive
Chain (415, Non-sealed)
Electrical & Electronics System
Headlight Type
LED
Taillight Type
LED
Chassis & Suspension
Frame Type
Chrome-molybdenum steel central-tube frame
Front Suspension
XACT 35 WP Upside-Down fork, Ø 35 mm
Front Suspension Travel
200 mm / 7.87 inches
Rear Suspension
XACT WP mono shock
Rear Suspension Travel
190.5 mm / 7.5 inches
Rear Subframe
Steel
Wheels & Brakes
Wheels
Alloy rims, spokes
Front Tire Size
60/100 -12 36J TT
Rear Tire Size
2.75 – 10 38J TT
Front Brakes
Disc brake (4 piston caliper) 160 mm
Rear Brakes
Disc brake (2 piston caliper) 160 mm
Dimension & Weights
Seat Height
634 mm / 24.96 inches to 683 mm / 26.88 inches
Wheelbase
1023.5 mm / 40.29 inches to 1035.6 mm / 40.77 inches
Ground Clearance
214.6 mm / 8.44 inches to 222.8 mm / 8.77 inches
Fuel Tank Capacity
2.3 L / 0.6 US gallons
Wet (kerb/curb) Weight
~ 45.7 kg / 100.7 lbs
Dry Weight
~ 42.5 kg / 93.7 lbs
*We strive to provide the most comprehensive and accurate specifications possible. However, certain details may not be available if the manufacturer did not disclose them or if the information is no longer publicly accessible. If you find any discrepancy with any data on this site, please feel free to let us know at contact@throttlecraze.com
