KTM: 2011 KTM 250 EXC-F Sixdays Enduro Motorcycle

The smallest KTM four-stroke mercilessly shows what it’s made of. The latest four-valve technology gives the 250 EXC-F massive thrust from the bottom of the range up into the highest speed ranges.

KTM Enduro MotorcyclesAn extremely agile, light-weight muscleman that is a great success in the small class – not only in the world championships.

The perfect motorcycle for everyone who attaches particular importance to riding their motorbike themselves rather than being driven by their motorbike.

The 250 EXC-F is an extremely agile and lightweight enduro bike. With controllably accessible power at engine speeds of up to 13,000 rpm, something that no one would have believed possible for a four-stroke quarter-litre a few years ago.

Trendsetting overall concept in a very compact design with electric starter as standard. The heart of the 250 EXC-F is a high-tech power unit with stacks of technical innovations and performance unrivalled in this class. Those inclined to underestimate quarter-litre machines should be forewarned – no other engine has won the E1 World Championship title more often.

Engine

The SIX-DAYS models draw their power from two-stroke and four-stroke racing engines which have been optimised down to the finest detail for Enduro racing. Powerful, with perfect power delivery and excellent durability. Pure energy!

Tank

Ergonomic tank for ideal contact with the bike. Special KTM airflow system with ducts beneath the spoilers for an optimum fresh air supply to the airbox. Another advantage for racing: transparent polyethylene lets you see the fuel level from the outside.

Seat

The seat of the Six-Days bike is supplied with additional pockets and logos. It also has a reduced-weight, optimised foam core for improved comfort and longer service life.

Cylinder Head

The heart of the exceedingly compact 250 cc engine is the intelligently designed cylinder head: four titanium valves are opened by twin overhead camshafts, the 8g (!) superlight cam followers are DLC-coated. This extremely hard carbon layer (diamond-like-carbon) minimises friction – and therefore wear – and is one of the reasons behind potential engine speeds of up to 13,000 rpm. The perfect motorcycle for everyone who attaches particular importance to riding their motorbike themselves rather than being driven by their motorbike.

The 250 EXC-F is an extremely agile and
lightweight enduro bike. With controllably accessible power at engine speeds of up to 13,000 rpm, something that no one would have believed possible for a four-stroke quarter-litre a few years ago. 250 CC FOUR STROKE First Oil Filling for all KTM Engines.

Pistons

The uncompromising performance of the 250cc engine demands uncompromisingly durable material. One such example is the extra hard piston rings that guarantee unlimited durability, even at the far end of the rev counter.

Airbox

You can tell how great the lead actually is by the supposedly insignificant details. The airbox has been designed in such a way that the Twin-Air air filter is provided with maximum protection from water and dirt. The air filter can be replaced without tools within 15 seconds.

bodywork

Bodywork like that of a KTM cannot be designed on the drawing board. It quite literally has to be “experienced”. Around 55 World Championship titles, 50 years and a few hundred thousand kilometres later – that’s when you have the experience for bodywork as good as that of a KTM when it comes to handling, freedom of movement and ergonomics.

Engine

This engine is the benchmark in its class. We have good reason to believe that we have the perfect design for enduro sport use. Lightweight, compact and robust. With two separate lubrication circuits and an electric starter as standard. A torque-filled powerhouse with lively acceleration, penetrating power in the middle and plenty to spare at the top. Although just as controllable at all output levels.

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Engine

Engine type Single cylinder, 4-stroke
Displacement 248.6cc
Bore x stroke 76 x 54.8 mm (2.99 x 2.16″)
Compression ratio 12.8:1
Starter/Battery Kick- and electric starter/12V 4Ah
Transmission 6 gears
Carburetor Keihin FCR MX 39
Control 4 V/DOHC with finger followers
Lubrication Pressure lubrication with 2 oil pumps
Engine lubrication Motorex, SAE 10W50
Primary drive 22:68
Final drive 14:38 (13:50)
Cooling Liquid cooled
Clutch Wet multi-disc clutch, operated hydraulically
Ignition Kokusan
Chassis

Frame Central double-cradle-type 25CrMo4 steel
Subframe Aluminium
Handlebar Neken, Aluminium Ø 28/22 mm (1.10/0.87″)
Front suspension WP USD Ø 48 mm (1.89″)
Rear suspension WP PDS shock absorber
Suspension travel front/rear 300/335 mm (11.81/13.19″)
Brakes, front/rear Disc brakes Ø 260/220 mm (10.24/8.66″)
Rims, front/rear 1.60 x 21″; 2.15 x 18″ Excel
Tires, front/rear 90/90-21″; 120/90-18″
Chain X-ring chain 5/8 x 1/4″
Main silencer Aluminium
Steering head angle 63.5°
Wheel base 1475 ± 10 mm (58.07 ± 0.39″)
Ground clearance (unloaded) 380 mm (15″)
Seat height 985 mm (38.78″)
Tank capacity approx. 9.2 liters (2.43 gal)
Weight (no fuel) approx. 105.7 kg (233 lbs)
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2 comments to KTM: 2011 KTM 250 EXC-F Sixdays Enduro Motorcycle

  1. thenotoilguy
    February 11th, 2011 at 1:00 pm

    Sick bike! Happy riding =)

  2. Motorcycle Advice USA
    February 14th, 2011 at 9:17 am

    Ah yes the 2011 KTM 250 EXC-F Sixdays. You could never go wrong getting on one of those! Happy riding to you to!

    Thank you.
    Motorcycle Advice USA