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KTM 50 SX
2008Off-road

KTM 50 SX

Key specifications

Engine
49 cc
Weight
39 kg
Fuel type
petrol
Fuel capacity
0.5 L
Transmission
Automatic
Seat height
26 mm
Front brakes
Single disc. Bremo
Rear brakes
Single disc. bremo

Overview

Introducing the 2008 KTM 50 SX, a powerhouse in the minibike-cross category that perfectly exemplifies KTM's commitment to performance and youth development in motorcycling. Designed for aspiring young racers, this nimble machine is engineered to provide an exhilarating introduction to the world of motocross. With its aggressive styling and lightweight frame, the 50 SX is not just a bike; it’s a ticket to adventure, encouraging young riders to hone their skills and ignite their passion for dirt biking. At the heart of the KTM 50 SX is a robust 49cc single-cylinder, two-stroke engine, engineered to deliver a thrilling ride that balances power and control. With a compression ratio of 12.5:1 and a bore-stroke ratio of 39.5 x 40.0 mm, this engine is designed for rapid acceleration and responsive handling. The liquid-cooled system ensures optimal performance even during intense rides, while the automatic gearbox and adjustable centrifugal clutch make it easier for younger riders to focus on mastering their technique without the complexities of manual shifting. Whether tackling tight corners on a motocross track or cruising through trails, the 50 SX serves up a ride that’s both exhilarating and confidence-inspiring. The 2008 model is equipped with cutting-edge features that enhance both performance and safety. Its double-cradle-type frame provides excellent stability, paired with a Marzocchi front suspension and WP monoshock rear suspension that absorb bumps with ease, offering 120 mm and 125 mm of travel, respectively. The braking system is equally impressive, featuring single disc brakes from Bremo that deliver reliable stopping power to keep young riders safe. With a seat height of just 660 mm, this bike is perfectly suited for younger riders, allowing them to maintain control and comfort as they navigate their environment. The kick starter adds a classic touch, giving the 50 SX a straightforward, no-nonsense charm. **

Pros

  • Lightweight design (38.8 kg) enhances maneuverability and control for young riders.
  • Powerful and responsive two-stroke engine provides thrilling performance, perfect for aspiring racers.
  • Advanced suspension system ensures a smooth ride over rough terrain, enhancing confidence in handling.

Cons

  • Limited fuel capacity (1.80 liters) may necessitate frequent stops during extended riding sessions.
  • The automatic gearbox may not provide the learning experience of manual shifting for more advanced young riders.
  • As a specialized machine, it may not be suitable for casual riding outside of off-road or motocross environments.

Technical details

Source specification data

Make
KTM
Model
50 SX
Category
Minibike-cross
Starter
Kick
Clutch
Centrifugal clutch (adjustable)
Gearbox
Automatic
Ignition
Seletra analogue
Fuel System
Carburettor. DELL´ORTO PHBG 19 BS
Bore X Stroke
39.5 x 40.0 mm (1.6 x 1.6 inches)
Compression
12.5:1
Displacement
49.00 ccm (2.99 cubic inches)
Cooling System
Liquid
Engine Details
Single cylinder, two-stroke
Lubrication System
Mixture lubrication 1:60
Transmission Type Final Drive
Chain
Dry Weight
38.8 kg (85.5 pounds)
Seat Height
660 mm (26.0 inches) If adjustable, lowest setting.
Fuel Capacity
1.80 litres (0.48 gallons)
Ground Clearance
255 mm (10.0 inches)
Alternate Seat Height
685 mm (27.0 inches) If adjustable, highest setting.
Rake
24.0°
Trail
90 mm (3.5 inches)
Rear Tyre
2.75-10
Frame Type
Double grinded central double-cradle-type frame
Front Tyre
2.50-12
Rear Brakes
Single disc. bremo
Front Brakes
Single disc. Bremo
Rear Suspension
WP monoshock
Front Suspension
Marzocchi Ø 32 mm (1.26
Rear Wheel Travel
125 mm (4.9 inches)
Front Wheel Travel
120 mm (4.7 inches)
Rear Brakes Diameter
140 mm (5.5 inches)
Front Brakes Diameter
160 mm (6.3 inches)