Technical Data; Engine; Engine Tightening Torques - KTM RC 250 R Owner's Manual

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TECHNICAL DATA

22.1

Engine

Design
Displacement
Stroke
Hole
Compression ratio
Control
Valve - valve stem diameter
Intake
Exhaust
Valve clearance
Exhaust at: 20 °C (68 °F)
Intake at: 20 °C (68 °F)
Crankshaft bearing
conrod bearing
Piston pin bearing
Piston
Piston ring
Engine lubrication
Primary transmission
Clutch
Transmission
Transmission ratio
1st gear
2nd gear
3rd gear
4th gear
5th gear
6th gear
Mixture preparation
Ignition system
Alternator
Spark plug
Electrode gap, spark plug
Cooling
Idle speed
22.2

Engine tightening torques

Oil nozzle 125
Oil nozzle 50
Oil nozzle 60
Nut, cylinder head
Oil nozzle, timing chain tensioner
Remaining engine screws
Screw cap, clutch pressure cap
Screw plug, alternator cover
Screw, bearing pin of oil pump idler
gear
Screw, bearing retainer of main shaft
1-cylinder 4-stroke engine with balancer shaft, water-cooled
249.5 cm³ (15.225 cu in)
48.5 mm (1.909 in)
81 mm (3.19 in)
14.5:1
DOHC, 4 valves per cylinder, chain-driven
34.5 mm (1.358 in)
27 mm (1.06 in)
0.20... 0.23 mm (0.0079... 0.0091 in)
0.10... 0.13 mm (0.0039... 0.0051 in)
Slide bearing
Slide bearing
No bearing bushes - DLC-coated piston pins
Forged light alloy
1 compression ring, 1 oil scraper ring
Semi-dry sump lubrication system with 1 force pump and 2 suc-
tion pumps
22:64 (22:63/22:65)
Multi-disc clutch in oil bath/mechanically operated
6-gear cassette gearbox, claw-shifted, multiple optional gear
ratios are available
14:30 (16:36/15:31)
20:36 (16:30/19:33)
18:28 (18:29/18:27)
21:29 (21:30/18:24)
21:26 (22:28/19:24/19:23/20:24)
22:25 (23:27/19:22/26:29/20:22)
Electronically controlled fuel injection
Contactless controlled fully electronic ignition with digital igni-
tion adjustment
12 V, 70 W
NGK LMAR9AI-8
0.7... 0.8 mm (0.028... 0.031 in)
Water cooling, permanent circulation of coolant by water pump
2,900... 3,100 rpm
M4
M4
M4
M5
M5
M5
M5
M5
M5
M5
2 Nm (1.5 lbf ft)
2 Nm (1.5 lbf ft)
2 Nm (1.5 lbf ft)
6 Nm (4.4 lbf ft)
6 Nm (4.4 lbf ft)
6 Nm (4.4 lbf ft)
5 Nm (3.7 lbf ft)
6 Nm (4.4 lbf ft)
6 Nm (4.4 lbf ft)
6 Nm (4.4 lbf ft)
Loctite ® 243™
Loctite ® 243™
Loctite 243™
®
–
Loctite ® 243™
–
–
Loctite ® 243™
Loctite ® 243™
Loctite ® 243™
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