KTM 450 EXC-R EU - Manual (Page 90)

TECHNICAL DATA - ENGINE
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Design 1-cyliner 4-stroke engine, water-cooled
Displacement (Every 450 models) 449.3 bcm³ (27.418bcubin)
Displacement (Every 530 models) 510.4 bcm³ (31.147bcubin)
Stroke (Every 450 models) 63.4 bmm (2.496bin)
Stroke (Every 530 models) 72 bmm (2.83bin)
Bore 95 bmm (3.74bin)
Compression ratio 11,9:1
Idle speed 1550… 1650 brpm
Control 4 valves controlled via rocker arm, drive via tooth/wheel chain
Valve diameter, intake 39.5 bmm (1.555bin)
Valve diameter, exhaust 31.7 bmm (1.248bin)
Valve clearance
Outfeed at: 20 b°C (68b°F) 0.12… 0.17 bmm (0.0047… 0.0067bin)
Infeed at: 20 b°C (68b°F) 0.10… 0.15 bmm (0.0039… 0.0059bin)
Crankshaft bearing 2 grooved ball bearings
Conrod bearing Needle bearing
Piston pin bearing not a bearing bush - 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 bV, 150bW
Ignition Contactless controlled fully electronic ignition with digital igni-
tion adjustment, type Kokusan
Spark plug NGK LK AR 8A - 9
Spark plug electrode gap 0.8… 0.9 bmm (0.031… 0.035bin)
Cooling Water cooling, permanent circulation of coolant by water pump
Starting aid Electric starter / kickstarter

Capacity - engine oil
Engine oil 0.6 bl (0.6bqt.) Engine oil (SAE 10W/50) ( P. 114)

Capacity - gear oil
Gear oil 0.9 bl (1bqt.) Engine oil (SAE 10W/50) ( P. 114)