Technical Data - Engine - KTM 350 SX-F Owner's Manual

TECHNICAL DATA - ENGINE

Design
Displacement
Stroke
Bore
Compression ratio
Idle speed
Control
Valve diameter, intake
Valve diameter, exhaust
Valve clearance
Intake at: 20 °C (68 °F)
Exhaust at: 20 °C (68 °F)
Crankshaft bearing
Conrod bearing
Piston pin bearing
Pistons
Piston rings
Engine lubrication
Primary transmission
Clutch
Gearbox (All SX‑F models)
Gearbox (XC‑F)
Transmission ratio (All SX‑F models)
1st gear
2nd gear
3rd gear
4th gear
5th gear
Transmission ratio (XC‑F)
1st gear
2nd gear
3rd gear
4th gear
5th gear
6th gear
Alternator
Ignition
Spark plug
Spark plug electrode gap
Cooling
Starting aid (All SX‑F models)
Starting aid (XC‑F)
1-cylinder 4-stroke engine, water-cooled
349.7 cm³ (21.34 cu in)
57.5 mm (2.264 in)
88 mm (3.46 in)
13.5:1
2,050... 2,150 rpm
DOHC, four valves controlled via cam lever, drive via timing
chain
36.3 mm (1.429 in)
29.1 mm (1.146 in)
0.10... 0.15 mm (0.0039... 0.0059 in)
0.13... 0.18 mm (0.0051... 0.0071 in)
2 cylinder bearings
Needle bearing
Not a bearing bush - DLC-plated piston pins
Forged light alloy
1 compression ring, 1 oil scraper ring
Pressure circulation lubrication with two Eaton pumps
24:73
Multidisc clutch in oil bath/hydraulically activated
5-gear, claw shifted
6-gear, claw shifted
14:28
16:26
18:24
21:24
22:21
15:31
16:25
20:25
22:23
25:22
26:20
12 V, 66 W
Contactless controlled fully electronic ignition with digital igni-
tion adjustment
NGK LMAR9AI-8
0.8 mm (0.031 in)
Water cooling, permanent circulation of coolant by water pump
Electric starter
Kick starter and electric starter
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