KTM 450 SMR - Manual (Page 72)

TECHNICAL DATA - ENGINE
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Design 1-cyliner 4-stroke engine, water-cooled
Displacement 449.3 ‘cm³ (27.42‘cu‘in)
Stroke 60.8 ‘mm (2.39‘in)
Bore 97 ‘mm (3.82‘in)
Compression ratio 12,5:1
Idle speed 1600… 1650 ‘rpm
Control 4 valves controlled by cam levers ad 2 camshafts, driven by heli-
cal gear pair and tooth-wheel chain
Valve diameter, intake 40.4 ‘mm (1.59‘in)
Valve diameter, exhaust 31.7 ‘mm (1.25‘in)
Valve clearance, cold, intake 0.07… 0.13 ‘mm (0.0028… 0.01‘in)
Valve clearance, cold, exhaust 0.12… 0.18 ‘mm (0.0047… 0.01‘in)
Crankshaft bearing 2 cylinder roller bearing
Conrod bearing Needle bearing
Piston pin bearing Bronze bush
Pistons Forged light alloy
Piston rings 1 compression ring, 1 oil scraper ring
Engine lubrication Pressure circulation lubrication with 3 rotor pumps
Primary transmission 29:74
Transmission ratio
1st gear 18:31
2nd gear 20:29
3rd gear 22:27
4th gear 24:25
5th gear 26:23
Generator 12 ‘V, 42‘W
Ignition Contactless controlled fully electronic ignition with digital igni-
tion adjustment, type Kokusan
Spark plug NGK CR 9 EKB
spark plug electrode gap 0.7 ‘mm (0.03‘in)
Cooling Water cooling, permanent circulation of coolant by water pump
Starting aid Electric starter
Capacity - engine oil
Engine oil 1.35 ‘l (1.43‘qt.) Engine oil (SAE 10W/50) ( P. 82)
Capacity - coolant
Coolant 1.2 ‘l (1.27‘qt.) Coolant ( P. 82)
Coolant (mixed ready to use) ( P. 82)