Motocross SX - 250sx-f
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The KTM 250 SX-F is a real milestone in the company history and certainly the star of the SX models in 2006. Thanks to the innovative engine with double overhead camshafts, the redesigned chassis with forged rocker arm and many other high quality details, it will be hard going for the competitors. And in the truest sense of the word, the new 250 cc 4-stroke DOHC engine is the real “heart” of the KTM 250 SX. After the engine proved its power and reliability in the 2004 and 2005 World Championships, we’ve now let the beast off the chain and made it the series engine. Better hold on tight, this thing goes like the Devil.
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| Chassis |
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| Frame |
central double-cradle-type 25 CrMo4 |
| Subframe |
aluminum 7020 |
| Handlebar |
Renthal 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") |
| Front / Rear brakes |
disc brakes 260 / 220 mm |
| Front / rear rims |
1.60 x 21"; 2.15 x 19" |
| Front / rear tires |
80/100-21"; 100/90-19" |
| Chain |
chain 5/8 x 1/4" |
| Main silencer |
aluminum |
| Steering head angle |
63.5° |
| Wheelbase |
1481±10 mm (58.31±0.39") |
| Ground clearance (unloaded) |
380 mm (15") |
| Seat height |
925 mm (36.42") |
| Fuel capacity |
approx. 7 liters (1.85 gal) |
| Weight (ready to race, no fuel) |
approx. 98.5 kg (216 lbs) |
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| Engine |
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| Engine Type |
single cylinder, 4-stroke |
| Displacement |
249.5 cc |
| Bore / stroke |
76 / 55 (2.99 / 2.17") |
| Compression ratio |
12.8 : 1 |
| Starter |
kick starter |
| Transmission |
6 gears |
| Carburetor |
Keihin MX FCR 39 |
| Power Valve Control |
4 V / DOHC with finger levers |
| Lubrication |
pressure lubrication with 2 Eaton pumps |
| Transmission lubrication |
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| Engine oil |
1.2l Motorex Power Synt 4T 10W-50 |
| Primary ratio |
22 : 68 |
| Final drive |
13 : 48 |
| Cooling |
liquid cooled |
| Clutch |
wet multi-disc clutch, operated hydraulically |
| Ignition |
Kokusan digital 4K-3A |
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View KTM accessories | View the KTM website >>
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