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KTM 50 SX
2012Off-road

KTM 50 SX

Key specifications

Engine
49 cc
Weight
42 kg
Fuel type
petrol
Fuel capacity
0.6 L
Transmission
Automatic
Seat height
27 mm
Front brakes
Single disc. Four-pot brake caliper
Rear brakes
Single disc. Two-pot brake caliper

Overview

Introducing the 2012 KTM 50 SX, a spirited minibike that stands out in the competitive youth motocross arena. Designed specifically for young riders looking to hone their skills on the track, the 50 SX is not just a bike; it’s a gateway to the world of racing. With a lightweight frame and cutting-edge suspension, this bike is built to inspire confidence while delivering thrilling performance. KTM has long been recognized for its dedication to quality and innovation, and the 50 SX is no exception, perfectly blending aggressive styling with functionality to cater to aspiring motocross champions. At the heart of the KTM 50 SX lies a robust 49cc, single-cylinder, two-stroke engine, which delivers a punchy power band that is both exhilarating and manageable for younger riders. With a bore and stroke of 39.5 x 40.0 mm, this little powerhouse is designed to provide a responsive experience, while the automatic gearbox and centrifugal clutch ensure smooth acceleration without overwhelming novice riders. The liquid cooling system helps maintain optimal engine performance, even during those intense track sessions, allowing riders to focus on mastering their techniques rather than worrying about overheating. The result is a bike that is not only fun to ride but also encourages skill development and confidence on two wheels. The 2012 KTM 50 SX is packed with features that enhance both performance and comfort. Its central tube frame, constructed from chrome molybdenum steel and powder-coated for durability, provides excellent stability and strength while remaining lightweight at just 41.5 kg (91.5 pounds). The WP Suspension system, featuring a USD 35 front fork and a 3614 BAEM rear shock, ensures exceptional handling and responsiveness over rough terrain, with 205 mm of front travel and 185 mm of rear travel to absorb bumps and jumps effortlessly. Safety is also a priority with a powerful braking system: a 160 mm front disc paired with a four-pot caliper and a 140 mm rear disc with a two-pot caliper that work in harmony to provide reliable stopping power. **

Pros

  • Lightweight Design: At only 41.5 kg, the bike is easily maneuverable, making it ideal for younger riders.
  • User-Friendly Power Delivery: The automatic gearbox and centrifugal clutch make it easier for novice riders to learn without the complexity of manual shifting.
  • Exceptional Suspension: The WP Suspension system provides excellent handling and comfort, allowing for smooth rides over rough terrains.

Cons

  • Limited Fuel Capacity: With only 2.30 liters (0.61 gallons), fuel range may be restrictive during longer practice sessions.
  • Kick Start Only: The lack of an electric start may pose a challenge for younger riders, especially in challenging conditions.
  • Small Engine Size: While perfect for beginner riders, the 49cc engine may not satisfy those looking for more power as they advance in skill.

Technical details

Source specification data

Make
KTM
Model
50 SX
Category
Minibike-cross
Starter
Kick
Color Options
Orange, black, white
Clutch
3-lining automatic clutch on the main shaft / centrifugal force
Gearbox
Automatic
Ignition
Seletra 2p D36
Driveline
Primary
drive: 61:33.
Rigid
1-stage reduction gear.
Engine Type
Reed intake
Fuel System
Carburettor. DELL´ORTO PHBG 19 BS
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
Exhaust System
Aluminium
Lubrication System
Mixture oil lubrication 1:60
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
1.5 x 12in., 1.6 x 10in. Alu
Rear Tyre
2.75-10
Frame Type
Central tube frame of chrome molybdenum steel tubing, powder-coated
Front Tyre
60/100-12
Rear Brakes
Single disc. Two-pot brake caliper
Front Brakes
Single disc. Four-pot brake caliper
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

Orangeblackwhite