KTM 400 EXC Owner's Manual page 57

TECHNICAL DATA – ENGINE
ENGINE
Design
Displacement
Bore/Stroke
Ratio
Fuel
Valve timing
Camshaft
Valve diameter Intake
Valve diameter Exhaust
Valve clearence cold Intake
Valve clearence cold Exhaust
Crank shaft bearing
Connecting rod bearing
Top end bearing
Piston alluminium alloy
Piston rings
Engine lubrication
56
Engine oil
Quantity of engine oil
Primary ratio
Clutch
Transmission claw shifted
Gear ratio
1st Gear
2nd Gear
3rd Gear
4th Gear
5th Gear
6th Gear
Ignition system
Generator
Spark plug
Spark plug gap
Cooling system
Cooling liquid
Starting equipment
JASO T903 MA
TEMPERATUR
5W/40
»
250 EXC 400 EXC
Liquid-cooled single cylinder 4-stroke engine with balancer shaft
250 cc 398 cc
75 / 56.5 mm 89 / 64 mm 95 / 63.4 mm 95 / 63.4 mm 89 / 72 m 95 / 72 mm
12 : 1 11 : 1
unleaded fuel with at least RON 95 (USA = Premium RON 91)
4 valves over rocker arm and 1 overhead camshaft, camshaft drive through single chain
5532 595/0121 590/5521 590/5521 590/5521 590/5521
28 mm 35 mm
24 mm 30 mm
0.10 - 0.15 mm (0,004 - 0,006 in)
0.10 - 0.15 mm (0,004 - 0,006 in)
2 cylinder roller bearing
needle bearing
bronze bushing
cast cast
1 compression ring, 1 oil scraper ring
pressure circulation lubrication with two rotor pumps
full synthetic oil (Motorex Power Synt 4T 10W/50)
1.25 liters
straight geared spur wheels 33:76 Z
multi disc clutch in oil bath
6-speed 6-speed
14:38 14:34
16:36 17:31
19:34 19:28
21:32 22:26
23:30 24:23
22:25 26:21
contactless DC-CDI ignition with digital advanced system by KOKUSAN
12V 150W
NGK DCPR 8 E
0.6 mm (0.02367 in)
liquid cooled, permanent rotation of cooling liquid through mechanically driven water pump
1 liter, 50% antifreeze, 50% destilled water, at least -25° (-13° F)
kick - electric starter
0°C
32°F
10W/50
450 SX 450 XC 450 EXC
449 cc 449 cc 448 cc
12 : 1 12 : 1 11 : 1
35 mm (Titan) 35 mm 35 mm
30 mm (Titan) 30 mm 30 mm
forged forged cast
4-speed 6-speed 6-speed
16:32 14:34 14:34
18:30 17:31 17:31
20:28 20:28 19:28
22:26 22:26 22:26
– 24:24 24:23
– 21:18 26:21
– 12V 150W
kickstarter kick - electric starter
Engine oil
Only use fully synthetic engine oils that meet the JASO MA quality require-
ments (see information on the can).
KTM recommends Motorex Power Synt 4T in the 10W/50 viscosity (for tem-
peratures over 0°C, 32°F) or 5W/40 (for temperatures under 0°C, 32°F).
POOR OIL QUALITY OR MINOR QUANTITY CAUSE EARLY ENGINE-WEAR.
525 SX 525 XC 525 EXC
510 cc
11 : 1
35 mm
30 mm
forged
4-speed 6-speed 6-speed
16:32 16:32 14:34
18:30 18:30 17:31
20:28 20:28 19:28
22:26 22:26 22:26
– 24:24 24:23
– 21:18 26:21
– 12V 150W
kickstarter kick - electric starter