KTM 450 XC-W SIX DAYS USA 2010, Owner'S Manual

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TECHNICAL DATA - ENGINE
90
Design 1-cylinder 4-stroke engine, water-cooled
Displacement (all 400 models) 393.4 cm³ (24.007 cu in)
Displacement (All 450 models) 449.3 cm³ (27.418 cu in)
Displacement (All 530 models) 510.4 cm³ (31.147 cu in)
Stroke (all 400 models) 55.5 mm (2.185 in)
Stroke (All 450 models) 63.4 mm (2.496 in)
Stroke (All 530 models) 72 mm (2.83 in)
Bore 95 mm (3.74 in)
Compression ratio (all 400 models) 11.1:1
Compression ratio (All 450/530 models) 11.9:1
Idle speed 1,550… 1,650 rpm
Control OHC, 4 valves controlled via rocker arm, drive via tooth/wheel
chain
Valve diameter, intake 39.5 mm (1.555 in)
Valve diameter, exhaust 31.7 mm (1.248 in)
Valve clearance
Exhaust at: 20 °C (68 °F) 0.12… 0.17 mm (0.0047… 0.0067 in)
Intake at: 20 °C (68 °F) 0.10… 0.15 mm (0.0039… 0.0059 in)
Crankshaft bearing 2 grooved ball bearings
Conrod bearing Needle bearing
Piston pin bearing No bearing bushes - DLC-plated piston pins
Pistons Forged light alloy
Piston rings 1 compression ring, 1 oil scraper ring
Engine lubrication Pressure circulation lubrication with 2 rotor pumps (engine) / 1
rotor pump (transmission)
Primary transmission 33:76
Clutch Multidisc clutch in oil bath / hydraulically activated
Transmission ratio
1st gear 14:36
2nd gear 17:32
3rd gear 19:28
4th gear 22:26
5th gear 24:23
6th gear 26:21
Generator 12 V, 150 W
Ignition Contactless controlled fully electronic ignition with digital igni-
tion adjustment, type Kokusan
Spark plug NGK LKAR 8AI - 9
Spark plug electrode gap 0.9 mm (0.035 in)
Cooling Water, permanent circulation of coolant by water pump
Starter Electric starter/kick starter
13.1
Capacity - engine oil
Engine oil 0.60 l (0.63 qt.) Engine oil (SAE 10W/50) ( p. 108)