2018 KTM 250 XC

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UNRIVALED 2-STROKE PERFORMANCE

With enough power to excel on all sorts of tracks and terrain, combined with an extremely lightweight chassis, the 250 XC has one of the best power-to-weight ratios in its class. The unrivalled performance of the lightweight 2-stroke engine makes it a true contender against the more complex 4-strokes.

Chassis

  • FEATHERWEIGHT: KTM engineers just love dropping weight year after year. The result: the 2018 KTM XC models are the slimmest, lightest dirt bikes out there
  • FRAME: The high-tech, lightweight chrome-moly steel frame has a knack for easy handling, outlandish rideability, precise cornering and excellent stability. You can also count on high torsional rigidity and low longitudinal stiffness. This results in better absorption of the energy created from the front and rear suspension, sucking up jumps and bumps. In short: more comfort and less rider fatigue. Laterally attached, lightweight aluminum engine head stays (the connection between cylinder head and frame) contribute to precise cornering and a reduced vibration level. The engineers were able to pull off all that, while making their frame 2.2 pounds lighter than that of the lightest competitor on the market. In addition, it is easier to maintain, easier to work on and supplies more space for the tank and other components. The bike also features an extra-light subframe made of aluminum, which tiptoes the scales at less than 2 pounds.
  • FOOTPEGS: Sophisticated ´No Dirt´ footpegs prevent smudging up the pegs, even when digging in deep ruts. Looking for a higher riding position? Then just mount the footpegs of the 2018 EXC models, which are 6 mm higher than the SX versions.
  • AIR FILTER BOX: The air filter box design offers maximum protection of the air filter against soiling, while ensuring maximum airflow. The large Twin Air filter is mounted in a stiff cage, which at the same time holds the system in place. This design is so simple, you could still pop a fresh one in with a face full of mud. Without tools. In seconds.
  • HANDLEBAR: KTM engineers sure know how to handle handlebars. This tapered one, made of high-strength aluminum, is fixed in damped rubber mounts and has two different positions. ODI lock-on grips make grip changes easy and do not require any wire or glue to be secured.
  • SWINGARM: The cast aluminum design offers low weight and a perfect flex behavior. The single-component casting process eliminates any inconsistencies and inherent weak points created by welding. It’s better looking too.
  • FUEL TANK: All XC models have new lightweight polyethylene tanks fitted with an integrated fuel pump system and capacity of 2.6 gallons. Inside threads on the filler cap make for an easy and reliable closure.
  • WHEELS: The 250 XC is fitted with lightweight, CNC-machined hubs, high-end Giant rims and black spokes with lightweight aluminum nipples providing maximum stability at minimum weight. The latest Dunlop Geomax AT81 tires guarantee perfect traction and outstanding performance.
  • COOLING SYSTEM: KTM’s proven cooling system routes the coolant from the cylinder head through the frame triangle, directly to aluminum radiators made by WP. Thanks to flow optimized internal circulation and CFD-calculated ventilation, the system is superbly efficient. In addition, new radiator protections improve heat dissipation. Especially in the mud. They are also integrated into the front part of the shrouds to protect the radiators in a crash.

Engine

  • CYLINDER: This compact cylinder with a 66.4 mm bore features a cutting-edge power valve unit with a sophisticated mechanism for the lateral support exhaust ports. Matched to a twin-component cylinder head, it is KTM’s secret to all-round grunt. The layout of the water jackets in the cylinder and head guarantees efficient heat dissipation when the going gets tough.
  • CLUTCH: The KTM 250 XC employs the KTM-developed DDS clutch (damped diaphragm steel) with a robust steel basket, extremely heat resistant clutch plates and new, nitrated steel liners reducing the wear. This clever design employs a diaphragm spring instead of the usual coil springs, making for considerably easier clutch action. A diaphragm spring also leaves sufficient space for a damping system to be integrated into the clutch hub. The goal is traction, but durability is as well. Light operation and telepathic amounts of control are standard with this hydraulic Brembo actuated clutch.
  • CARBURETOR: The KTM 250 XC is fitted with a MIKUNI TMX carburetor. This 38 mm flat slide carb lives to provide smooth and controllable power all the way up to the rev limitation. With a new intake manifold the carburetor is turned 7° in order to reduce the overflow of fuel. And it’s less sensitive to different altitudes and temperatures, so you can pin it wherever, whenever.
  • ENGINE: The engine of the KTM 250 XC has been known and respected for being the most powerful 2-stroke engine in its class. 2-strokes really do have a future at KTM. Their outstanding power-to-weight ratio, low cost and simplicity see to that. The KTM 250 XC engine has been optimized for mass centralization comes with a twin-valve controlled power valve, a balancer shaft for less engine vibrations, a 6-speed transmission and a hydraulically operated DDS clutch. This compact racer truly outshines the competition with its ripping performance and is the right choice for lovers of low purchase and maintenance costs. Oh, and of course don’t forget that 2-stroke snarl when you’re on the pipe.
  • CRANKCASES: These die-cast crankcases allow the implementation of a balancer shaft. So your ride will be as relaxed as it is rapid. Plus, your new favorite engine will keep looking as fresh as the day you bought it: its engine covers feature a smart surface structure in order to reduce the wear caused by the rider’s boots.
  • TRANSMISSION: A robust 6-speed semi-close transmission, its gear ratios perfectly in sync with the 250’s power band. An advanced ´No Dirt´ gear shift lever design prevents mud and sand from jamming the joint of the lever and guarantees trouble-free shifting.
  • BALANCER SHAFT: Say goodbye to numb feet and hands. This engine design allows the implementation of a lateral balancer shaft in order to keep the vibrations to a minimum. You know what that means: more comfort, less fatigue, more racing.
  • EXHAUST SYSTEM: The engineers meticulously tuned the resonator chamber for maximum torque and power, so this screamer is as tough as it is strong.
  • IGNITION: All 2-stroke models feature a new CDI control unit with an advanced hardware which improves the starting behavior of the engine. The ignition curves remain unchanged.

Striking Good Looks

  • BODYWORK: KTM R&D, KISKA Design and all our factory riders had their say in shaping the plastics with one goal: complete harmony between rider and bike. Perfect ergonomics and contact points provide maximum comfort in movement on the XC. The I-beam structures of the front and rear fenders guarantee maximum stability and a low weight thanks to well thought-out construction and mounting. They also stay cleaner for longer.
  • GRAPHICS: A new, tailor-made kit and a Factory orange frame. Because in this sport, champs deserve to look the part regardless of the dirt.

World Proof

  • SHOCK ABSORBER: The WP shock absorber has been developed with the entire frame and swingarm architecture in mind, including the linkage and the WP AER 48 front fork. It features machined and black anodized components and is a valuable, high-end product compared to roughcast reservoirs. A new, confidence inspiring setting with improved damping characteristics perfectly matches the front-end setup and its WP color scheme lets everyone know you have excellent taste in suspension.
  • FORK: The lightweight WP AER 48 front fork, a 48 mm USD air-sprung fork developed by WP in close collaboration with KTM, is a split fork with separate functions for each leg. That means damping functions are on the right side, whereas the air spring is in the left. This left leg features a 2-chamber system with a capsuled air cartridge to prevent loss of air pressure. Should the outer seal start to leak, the internal cartridge pressure will keep the bike in position. The air spring is easy to adjust to any rider weight via a single air valve. No special tools are required; the fork air pump is supplied with the bike. The right fork leg integrates a damping cartridge that tailors to all your damping needs. It can be adjusted to the track conditions and the rider’s preferences with a twist of a dial (compression from the top, rebound from the bottom, 30 clicks each). Right off the dealer floor, this fork (with reworked damping characteristics) is more comfortable and more sensitive than ever.
  • TRIPLE CLAMP: Top quality, CNC machined triple clamps have been a KTM trademark for years to ensure precise handling. The rubber damped handlebar fixation allows for two positions and an hour meter is fitted in order to let the rider know it’s time for a service.
  • BRAKES: These high-tech Brembo babies are combined with lightweight wave discs. You couldn’t brake any harder, better, faster or stronger.

General Information

Manufacturer KTM
Model Year 2018
Model 250 XC
Model Code 250XC
Stock Number KTM206615
Color Orange / Black

Brakes/Wheels/Tires

Brakes

Front - 10.24 in. (260 mm) Disc

Rear - 8.66 in. (220 mm) Disc

Wheels

Front - 1.6 x 21 in.

Rear - 2.15 x 18 in. Giant

Tires

Front - 80/100 - 21 in.

Rear - 110/90 - 18 in. Dunlop AT81

Dimensions

Weight Without Fuel - 216.7 lb. (98.4 kg)
Ground Clearance 14.6 in. (370 mm)
Wheelbase 58.5 ± 0.4 in. (1,485 ± 10 mm)
Seat Height 37.8 in. (960 mm)

Drivetrain

Transmission 6 Speed
Final Drive 13:50

Engine

Engine 1-Cylinder, 2-stroke
Displacement 249 cc
Bore x Stroke 66.4 x 72 mm
Fuel System Mikuni TMX 38 Carburetor
Fuel Capacity 2.6 gal. (10 l)
Ignition Kokusan
Clutch Wet, DDS multi-disc, Brembo hydraulics
Cooling Liquid
Lubrication Premix 60:1
Gear Ratio Secondary - 13:50
Battery 12V, 3 Ah

Operational

Starting Kick and electric
Primary Drive 26:73
Frame

Central double - cradle type 25CrMo4 steel

Handlbar - Neken, Aluminum, Ø 28 / 22 mm

Suspension

Front - WP Suspension AER 48 USD, Ø 48 mm; Travel - 12.2 in. (310 mm)

Rear - WP Monoshock 5018 BAVP DCC with Linkage; Travel - 11.81 in. (300 mm)

Rake 63.9°

Other

Includes 5/8 x 1/4 in. chain