
KTM 50 SX Junior
Key specifications
Overview
Introducing the 2008 KTM 50 SX Junior, a competitive minibike-cross motorcycle engineered specifically for young riders aged 6 to 9 years. This pint-sized powerhouse stands as a testament to KTM's commitment to nurturing the next generation of motorcycling enthusiasts. With its lightweight construction, agile design, and robust performance characteristics, the 50 SX Junior is designed to instill confidence and excitement in budding racers, making it an exceptional choice for parents seeking a reliable entry-level bike that can handle the rigors of competitive riding. At the heart of the 50 SX Junior lies a spirited 49cc single-cylinder, two-stroke engine that delivers a thrilling ride. With a compression ratio of 12.5:1 and a well-tuned Dell'Orto PHVA 14 DS carburetor, this bike produces impressive torque and power, ensuring young riders can fully experience the joy of acceleration. The automatic gearbox, paired with an adjustable centrifugal clutch, provides seamless power delivery, allowing riders to focus on mastering their skills without the complexities of manual shifting. Its liquid cooling system ensures optimal engine performance, even during extended rides, while the lightweight frame, weighing just 37.6 kg (82.9 lbs), contributes to its nimble handling and maneuverability on the track. The 2008 KTM 50 SX Junior is packed with features that enhance both safety and performance. Its central double-cradle frame is engineered for stability, while the Marzocchi front suspension and WP monoshock rear suspension provide 120 mm and 125 mm of travel, respectively, ensuring smooth handling over rough terrain. The brake system features a responsive single disc brake at the front and a reliable drum brake at the rear, giving young riders the stopping power they need to navigate tight corners and sudden stops. The bike's ground clearance of 220 mm (8.7 inches) and adjustable seat height of 585 mm (23 inches) make it accessible for a range of riders, promoting comfort and control while they hone their skills. **
Pros
- Lightweight & Agile: At just 37.6 kg, the 50 SX Junior is easy for young riders to handle, promoting confidence and control.
- User-Friendly Performance: The automatic gearbox and adjustable centrifugal clutch allow for an uncomplicated riding experience, perfect for beginners.
- Quality Suspension: With quality components like Marzocchi and WP, the bike delivers excellent handling and comfort over various terrains, enhancing ride enjoyment.
Cons
- Limited Power for Advanced Riders: As riders grow and gain experience, they may quickly outgrow the bike's power output, necessitating an upgrade.
- Small Fuel Capacity: With a fuel tank that holds only 1.80 liters (0.48 gallons), longer rides may require more frequent stops for refueling.
- Kick Start Only: The traditional kick start may be challenging for some younger riders, especially in competitive scenarios where quick starts are essential.
Technical details
Source specification data
- Make
- KTM
- Model
- 50 SX Junior
- Category
- Minibike-cross
- Starter
- Kick
- Comments
- Intended for children 6-9 years old.
- Clutch
- Centrifugal clutch (adjustable)
- Gearbox
- Automatic
- Ignition
- Seletra analogue
- Fuel System
- Carburettor. Dell´Orto PHVA 14 DS
- 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
- Exhaust System
- Aluminium
- Lubrication System
- Mixture lubrication 1:60
- Dry Weight
- 37.6 kg (82.9 pounds)
- Seat Height
- 585 mm (23.0 inches) If adjustable, lowest setting.
- Fuel Capacity
- 1.80 litres (0.48 gallons)
- Ground Clearance
- 220 mm (8.7 inches)
- Rake
- 24.0°
- Trail
- 90 mm (3.5 inches)
- Rear Tyre
- 2.75-10
- Frame Type
- Central double-cradle-type frame
- Front Tyre
- 2.50-10
- Rear Brakes
- Expanding brake (drum brake). Bremo
- Front Brakes
- Single disc. Bremo
- Rear Suspension
- WP monoshock
- Front Suspension
- Marzocchi
- Rear Wheel Travel
- 125 mm (4.9 inches)
- Front Wheel Travel
- 120 mm (4.7 inches)
- Rear Brakes Diameter
- 90 mm (3.5 inches)
- Front Brakes Diameter
- 160 mm (6.3 inches)