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KTM 50 SX
2017Off-road

KTM 50 SX

Key specifications

Engine
49 cc
Weight
42 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 2017 KTM 50 SX, an exhilarating entry-level motocross bike designed specifically for young riders eager to embrace the thrilling world of off-road racing. Renowned for its blend of performance and ease of use, the 50 SX is a standout choice for novice racers and young enthusiasts alike. With its lightweight construction and robust engineering, this mini-moto embodies KTM's commitment to delivering high-quality, race-ready machines, making it the perfect stepping stone for aspiring champions. At the heart of the 50 SX lies a spirited 49cc single-cylinder, two-stroke engine that offers an exciting combination of power and responsiveness. The engine’s bore and stroke dimensions of 39.5 x 40.0 mm ensure optimal performance across a range of riding conditions. Fueled by a Mikuni TMX carburettor and ignited by a Seletra 2p D36 ignition system, this bike delivers smooth power delivery and impressive acceleration. The centrifugal clutch allows for effortless starts, while the 1-speed gearbox keeps the focus on mastering the art of control and handling. With a lightweight chassis weighing in at just 41.5 kg, the 50 SX provides an agile riding experience that inspires confidence, making it a perfect companion for young riders honing their skills on the track. The 2017 KTM 50 SX is packed with features and technologies that enhance its performance and rider experience. The central-tube frame with a double-cradle design delivers exceptional stability and durability, while the WP upside-down front suspension with 205 mm of travel and a WP rear shock absorber with 185 mm of travel ensure responsive handling on rugged terrain. With a ground clearance of 252 mm and a seat height of just 684 mm, young riders can easily navigate obstacles and maintain comfort during their rides. The bike's braking system, featuring 160 mm single discs and powerful calipers at both the front and rear, provides reliable stopping power, giving parents peace of mind as their children tackle the trails. **

Pros

  • Lightweight Design: At only 41.5 kg (91.5 pounds), the 50 SX is easy for young riders to handle and maneuver.
  • Powerful Engine: The responsive 49cc two-stroke engine delivers a thrilling riding experience while allowing for power restrictions to accommodate beginner riders.
  • Advanced Suspension: The WP suspension system provides excellent shock absorption and stability, perfect for tackling rough terrain and jumps.

Cons

  • Limited Fuel Capacity: With a fuel tank size of just 2.30 litres (0.61 gallons), riders may need to refuel frequently during longer sessions.
  • Single-Speed Gearbox: The 1-speed transmission may limit versatility compared to models with more gears, which could affect performance in varied riding conditions.
  • Kick Start Only: The absence of an electric starter may be challenging for younger or less experienced riders, who might prefer an easier start method.

Technical details

Source specification data

Make
KTM
Model
50 SX
Category
Cross-motocross
Starter
Kick
Comments
The engine power can be restricted to 5.5 hp with a kit.
Color Options
Orange/white/black
Clutch
Centrifugal clutch
Gearbox
1-speed
Ignition
Seletra 2p D36
Engine Type
Reed intake.
Fuel System
Carburettor. Mikuni TMX
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
41.5 kg (91.5 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°
Wheels
Wire spoked
Frame Type
Central-tube frame with double-cradle
Rear Brakes
Single disc. Two-piston calipers.
Front Brakes
Single disc. Four-piston calipers.
Rear Suspension
WP shock absorber
Front Suspension
WP upside-down Ø 35 mm
Rear Wheel Travel
185 mm (7.3 inches)
Front Wheel Travel
205 mm (8.1 inches)
Rear Brakes Diameter
160 mm (6.3 inches)
Front Brakes Diameter
160 mm (6.3 inches)

Available colors

Orange/white/black