Technical Data - Engine - KTM 450 SX ATV Owner's Manual

TECHNICAL DATA - ENGINE

Design
Displacement (450 SX ATV)
Displacement (505 SX ATV)
Stroke
Bore (450 SX ATV)
Bore (505 SX ATV)
Compression ratio
Idle speed
Control
Valve diameter, intake
Valve diameter, exhaust
Valve clearance, cold, intake
Valve clearance, cold, exhaust
Crankshaft bearing
Conrod bearing
Piston pin bearing
Pistons
Piston rings
Engine lubrication
Primary transmission
Clutch
Transmission ratio
1st gear
2nd gear
Single cylinder 4-stroke engine, water-cooled
449.3 cm³ (27.418 cu in)
477.5 cm³ (29.139 cu in)
60.8 mm (2.394 in)
97 mm (3.82 in)
100 mm (3.94 in)
12.5:1
1,500... 1,600 rpm
DOHC, four valves controlled via cam lever, drive via helical gear
pair and tooth-wheel chain
40.4 mm (1.591 in)
31.7 mm (1.248 in)
0.07... 0.13 mm (0.0028... 0.0051 in)
0.12... 0.18 mm (0.0047... 0.0071 in)
2 cylinder roller bearing
Needle bearing
Bronze bush
Forged light alloy
1 compression ring, 1 oil scraper ring
Pressure circulation lubrication with 3 rotor pumps
26:78 straight tooth spur gears
Multidisc clutch in oil bath/hydraulically activated
16:34
19:31
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