KTM 250 SX - 2018 Specifications and Reviews

The 2018 KTM 250 SX is a lightweight two-stroke motocross bike engineered for competitive amateur and intermediate riders seeking aggressive performance on closed tracks. Known for its sharp handling and responsive power delivery, the 250 SX combines nimble agility with WP suspension technology to excel in technical terrain. Its compact dimensions and 95.4 kg weight make it ideal for riders prioritizing maneuverability and control.

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General information

CategoryCross / motocross
Year2018
ModelKTM 250 SX

Engine and Transmission Specifications

Driveline13:48. Primary drive: 26:72. 520 X-ring chain.
ClutchWet, DDS multi-disc clutch, Brembo hydraulics
Transmission type,final driveChain
Gearbox5-speed
Cooling systemLiquid
IgnitionContactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan
Fuel systemCarburettor. Mikuni TMX. Kokusan EMS.
Bore x Stroke66.4 x 72.0 mm (2.6 x 2.8 inches)
Engine detailsReed intake
Engine typeSingle cylinder, two-stroke
Capacity:249.00 ccm (15.19 cubic inches)
 
 

Brakes, suspension, Frame and wheels

WheelsCNC machined hubs. Excel rims. Wire spoked.
Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc. Two-piston calipers.
Front brakes diameter260 mm (10.2 inches)
Front brakesSingle disc. Four-piston calipers.
Rear wheel travel300 mm (11.8 inches)
Rear SuspensionWP shock absorber with linkage
Front wheel travel300 mm (11.8 inches)
Front SuspensionWP-USD, AER 48, Ø 48 mm
Rake (fork angle)26.5°
Frame typeChrome-molybdenum steel central-tube

Physical measures and capacities

Fuel capacity7.00 litres (1.85 gallons)
Wheelbase1,495 mm (58.9 inches)
Ground clearance375 mm (14.8 inches)
Seat height960 mm (37.8 inches) If adjustable, lowest setting.
Dry weight95.4 kg (210.3 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
StarterKick
Color optionsOrange/white/black

Performance Profile & Rider Fit

Best For

Track85%
City5%
Cornering90%
Daily Riding5%
Touring8%
Passenger0%

Rider Profile

Best ForThis is a full-blooded competition motocrosser best suited to experienced or intermediate off-road riders comfortable with a peaky 2-stroke powerband.
PurposeBuilt purely for motocross track riding and racing, not for street use or general transportation.
Rider FitThe tall 958 mm seat height, aggressive ergonomics, and physical demands of a light 2-stroke race bike require good rider fitness and reasonable inseam length.
CharacterSharp, explosive, and razor-agile, this bike rewards aggressive riding and precise throttle control with rapid acceleration bursts and flickable handling.
Not Ideal ForThis is not suitable for commuting, touring, carrying passengers, or riders seeking a comfortable, low-maintenance everyday motorcycle.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2018 KTM 250 SX Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 960mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2018 KTM 250 SX, with a cramped knee angle of around 85 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 2018 KTM 250 SX is a powerful and nimble dirt bike that offers a thrilling riding experience. With its 250cc 2-stroke engine, this motorcycle delivers impressive power and torque, making it perfect for tackling tough trails and challenging terrain. The lightweight chassis and agile handling make it easy to navigate through tight corners and twisty tracks, while the high-performance suspension provides a smooth and responsive ride. Whether you're a seasoned motocross rider or a beginner looking to step up your off-road game, the 2018 KTM 250 SX is sure to impress with its impressive performance and reliability. In addition to its exceptional performance, the 2018 KTM 250 SX also boasts a stylish and modern design, with eye-catching graphics and a sleek silhouette that is sure to turn heads on the trail. The ergonomically designed seat and controls ensure a comfortable and intuitive riding experience, while the high-quality components and build quality make this dirt bike a durable and long-lasting investment. With its combination of power, handling, and style, the 2018 KTM 250 SX is a top choice for riders looking for a high-performance dirt bike that can handle anything the trail throws at it.
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