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TECHNICAL SPECIFICATIONS - ENGINE 250 SX 2009
ENGINE
250 SX
Design
Liquid-cooled, single-cylinder, two-stroke engine with intake and exhaust control
Piston displacement
249 ccm
Bore / stroke
66.4 / 72 mm
Fuel
unleaded fuel with at least RON 95 (USA = Premium PON 91), mixed with high grade two stroke oil
Oil / gasoline ratio
1:60
when using high grade, two- stroke oil (Motorex Cross Power 2T).
Crankshaft bearing
1 deep-groove ball bearing / 1 cylinder roller bearing
Connecting rod bearing
needle bearing
Piston pin bearing
needle bearing
Piston
cast aluminum
Piston ring
two plain compression rings
Dimension „X“
0.0 + 0.1 mm
Ignition timing
1.9 mm (0.074 in) BTDC
Spark plug
NGK BR8 ECM
Electrode gap
0,60 mm
Dimension „Z“
47.5 mm (1.87 in)
Exhaust control start open
5500/min
Exhaust control fully open
7000/7500/7900/min (red/yellow/green spring)
Primary drive
straight cut spur gears
Primary ratio
26 : 72
Available chain sprockets
13t /14t for chain 5/8 x 1/4”
Clutch
multiple disc clutch in oil bath, hydraulically operated
Motorex brake fluid DOT 5.1
Transmission
5 speed, claw actuated
Gear ratio
1st gear
“1S14” 14 : 28 “1S28”
2nd gear
“2S15” 15 : 24 “2S24”
3rd gear
“3S18” 18 : 24 “3S24”
4th gear
“4S21” 21 : 24 “4S24”
5th gear
“5S22” 22 : 21 “5S21”
6th gear
Gear lubrication
0,7 liter Motorex Top Speed 4T 15W50
Available chain sprockets
13Z / 14Z für Kette 5/8 x 1/4"
Coolant
1.2 litres, 50% anti freeze, 50% distilled water, at least -25 °C (-13 °F)
Ignition system
stator 2K-1/flywheel 2K-2
Carburetor
flat-slide carburetor, carburetor setting see table
Air-filter
wet foam type air filter insert
BASIC CARBURETOR SETTING
250 SX
Carburetor
Keihin PWK 36 S AG
Carburetor setting mark
FK0180
Main jet
158 (155, 160)
Idling jet
42 (40)
Starting jet
85
Jet needle
N1EI (N1EH)
Needle position from top
III
Throttle valve
6.5
Air adjustment srew open
1
Summary of Contents for 125 SX 2010
Page 2: ...OWNERSMANUAL2010 250 SX 250 300 XC XC W EXC EXC SixDays ...
Page 3: ...OWNER S MANUAL 2010 125 SX 150 SX 250 SX Art no 3211480en ...
Page 91: ...TECHNICAL DATA SHOCK ABSORBER 89 Shock absorber oil p 95 SAE 2 5 ...
Page 93: ...91 ...
Page 222: ...119 ...
Page 223: ...WIRING DIAGRAM 120 ...
Page 226: ...WIRING DIAGRAM 123 ...
Page 304: ...1 2 3 4 7 12 Art No 3 206 088 E Repair manual KTM 250 300 ...
Page 306: ...bl bk 6 7 8 9 7 14 Art No 3 206 088 E Repair manual KTM 250 300 ...
Page 308: ...1 2 3 4 5 7 16 Art No 3 206 088 E Repair manual KTM 250 300 ...
Page 393: ...11 15 PERIODIC MAINTENANCE SCHEDULE 2010 250 SX ...
Page 394: ...11 16 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 396: ...11 18 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 397: ...11 19 ...
Page 409: ...EXC 250 300 2005 EXC SIX DAYS 250 300 05 06 12 11 ...
Page 413: ...EXC 250 300 2005 EXC SIX DAYS 250 300 05 06 12 15 ...
Page 414: ...EXC USA 250 2005 12 16 Art No 3 206 088 E Repair manual KTM 250 300 ...
Page 416: ...12 18 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 430: ...Repair manual KTM 250 300 Art No 3 206 088 E 12 32 250 EXC EXC Six Days EU AUS 2008 2009 ...
Page 431: ...12 33 250 300 XC USA 2008 250 CX W ZA 2008 2009 ...
Page 433: ...12 35 300 EXC E EXC E SixDays EU AUS 2008 2009 ...
Page 437: ...12 39 250 SX 2010 ...
Page 438: ...12 40 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 439: ...12 41 250 EXC EU 2010 ...
Page 440: ...12 42 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 441: ...12 43 250 300 EXC 2010 ...
Page 442: ...12 44 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 443: ...12 45 250 300 XC XC W 2010 ...
Page 444: ...12 46 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 445: ...REPAIRMANUAL2004 2010 2004 2005 DCC ...
Page 553: ...1 7 T 14031 Dismounting mounting tool ...
Page 559: ...2 6 Exploded view PDS 5018 SXS SMR 2005 2006 ...
Page 561: ...2 8 Exploded view PDS 5018 SXS 2007 ...
Page 739: ...1 7 T 14 030 Adaptor T 14 033 Assembling tool ...
Page 741: ...2 2 Repair manual WP Fork Closed Cartridge Art No 3 211 199 E Exploded view SXS 2005 ...
Page 746: ...2 7 Exploded view SXS 2006 ...
Page 751: ...2 12 Repair manual WP Fork Closed Cartridge Art No 3 211 199 E Exploded view SX 2007 ...
Page 756: ...2 17 Exploded view Fork SXS 2007 ...