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KTM 50 SX
2015Off-road

KTM 50 SX

Key specifications

Engine
49 cc
Weight
40 kg
Fuel type
petrol
Fuel capacity
0.6 L
Transmission
1-speed
Seat height
27 mm
Front brakes
Single disc. Four-piston calipers.
Rear brakes
Single disc. Two-piston calipers.

Overview

Introducing the 2015 KTM 50 SX, the perfect entry-level motorcycle that embodies the spirit of cross-motocross racing for young riders. Renowned for its agility and lightweight design, the 50 SX is specifically engineered for budding motocross enthusiasts who are ready to take their first steps into the thrilling world of dirt biking. With a striking orange and black color scheme that reflects KTM's iconic branding, this mini bike not only looks the part but is built to deliver an exhilarating ride that builds confidence and skills from the ground up. At the heart of the 50 SX lies a potent 49cc single-cylinder, two-stroke engine that produces a thrilling 5.5 horsepower, making it ideal for novice riders. The engine's simplicity, combined with a well-tuned carburettor and liquid cooling system, ensures consistent performance and reliability in various conditions. Riders will appreciate the 1-speed automatic gearbox, which allows for smooth acceleration without the complexities of shifting gears. This, coupled with the centrifugal clutch, means that young pilots can focus on mastering their riding skills rather than grappling with manual clutch control. With a lightweight frame weighing in at just 39.8 kg (87.7 pounds), the 50 SX is nimble, providing a responsive handling experience on the track or trail. KTM has outfitted the 50 SX with advanced features that enhance both safety and comfort. The central tube frame, crafted from durable chrome molybdenum steel and powder-coated for longevity, offers excellent rigidity and stability, while the WP suspension system ensures a plush ride over bumps and obstacles. The front and rear disc brakes, with impressive diameters of 160 mm and 140 mm respectively, provide reliable stopping power, allowing young riders to build confidence in their braking skills. With a ground clearance of 252 mm and an adjustable seat height of 684 mm, the 50 SX accommodates a wide range of rider sizes, making it versatile for growing enthusiasts. In summary, the 2015 KTM 50 SX is a remarkable entry-level motocross bike that strikes a perfect balance between performance and accessibility, making it an ideal choice for young riders eager to hone their skills and enjoy the thrill of off-road adventures.

Pros

  • Lightweight Design: At just 39.8 kg, it’s incredibly easy to handle for beginners.
  • User-Friendly Power Delivery: The automatic clutch and single-speed gearbox simplify the riding experience.
  • Robust Suspension: WP components provide excellent stability and comfort across varied terrains.

Cons

  • Limited Power for Advanced Riders: While great for beginners, more experienced riders may find the 5.5 hp restrictive.
  • Small Fuel Capacity: With only 2.3 liters, frequent refueling may be necessary during extended rides.
  • Kick Start Only: The absence of an electric starter might be a challenge for younger or less experienced riders.

Technical details

Source specification data

Make
KTM
Model
50 SX
Category
Cross-motocross
Starter
Kick
Comments
For absolute beginners, the engine power can be restricted to a moderate 5.5 hp with a kit.
Color Options
Orange/Black
Clutch
3-lining automatic clutch on the main shaft / centrifugal force
Gearbox
1-speed
Ignition
SELETTRA 2p D36
Driveline
11:40. Primary drive: 33:61 straight cut spur gear.
Engine Type
Reed intake.
Fuel System
Carburettor
Bore X Stroke
39.5 x 40.0 mm (1.6 x 1.6 inches)
Displacement
49.00 ccm (2.99 cubic inches)
Cooling System
Liquid
Engine Details
Single cylinder, two-stroke
Lubrication System
Mixture oil lubrication
Transmission Type Final Drive
Chain
Dry Weight
39.8 kg (87.7 pounds)
Seat Height
684 mm (26.9 inches) If adjustable, lowest setting.
Fuel Capacity
2.30 litres (0.61 gallons)
Ground Clearance
252 mm (9.9 inches)
Rake
24.0°
Frame Type
Central tube frame of chrome molybdenum steel tubing, powder-coated
Rear Brakes
Single disc. Two-piston calipers.
Front Brakes
Single disc. Four-piston calipers.
Rear Suspension
WP  Suspension  3614 BAEM
Front Suspension
WP  Suspension USD  35
Rear Wheel Travel
185 mm (7.3 inches)
Front Wheel Travel
205 mm (8.1 inches)
Rear Brakes Diameter
140 mm (5.5 inches)
Front Brakes Diameter
160 mm (6.3 inches)

Available colors

Orange/Black