Motocross sx - 250sx
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The ultimate challenge for experienced professionals who know their own minds. The enormous power of the 2-stroke is translated into an object of propulsion using the finest chassis technology. The 250 SX can therefore be measured against any 450 4-stroke. The low maintenance requirements mean you can have more fun on the track instead of making regular valve clearance adjustments.
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| Chassis |
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| Frame |
central double-cradle-type 25 CrMo4 |
| Subframe |
aluminum 7020 |
| Handlebar |
tapered Renthal Ø 28/22 mm (1.10") |
| 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"; 110/90-19" |
| Chain |
chain 5/8 x 1/4" |
| Main silencer |
aluminum |
| Steering head angle |
63.5° |
| Wheelbase |
1475±10 mm (58.07±0.39") |
| Ground clearance (unloaded) |
385 mm (15.16") |
| Seat height |
925 mm (36.42") |
| Fuel capacity |
approx. 7.5 litres (2 gal) |
| Weight (ready to race, no fuel) |
approx. 97.7 kg (208 lbs) |
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| Engine |
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| Engine Type |
single cylinder, 2-stroke |
| Displacement |
249 cc |
| Bore / stroke |
66.4 / 72 (2.61 / 2.83) |
| Compression ratio |
- |
| Starter |
kick starter |
| Transmission |
5 gears |
| Carburetor |
Keihin PWK 36 S AG |
| Power Valve Control |
TVC power valve |
| Lubrication |
mixture oil lubrication 1:60 |
| Transmission lubrication |
0,7l Motorex Top Speed 15W50 |
| Engine oil |
- |
| Primary ratio |
26 : 72 |
| Final drive |
13 : 48 |
| Cooling |
liquid cooled |
| Clutch |
wet multi-disc clutch, operated hydraulically |
| Ignition |
Kokusan digital 2K-1 |
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