TECHNICAL DATA - ENGINE
99
Design
1-cylinder 4-stroke engine, water-cooled
Displacement
349.7 cm³ (21.34 cu in)
Stroke
57.5 mm (2.264 in)
Bore
88 mm (3.46 in)
Compression ratio
12.3:1
Idle speed
1,950… 2,050 rpm
Control
DOHC, four valves controlled via cam lever, drive via timing
chain
Valve diameter, intake
36.3 mm (1.429 in)
Valve diameter, exhaust
29.1 mm (1.146 in)
Valve clearance
Intake at: 20 °C (68 °F)
0.10… 0.15 mm (0.0039… 0.0059 in)
Exhaust at: 20 °C (68 °F)
0.13… 0.18 mm (0.0051… 0.0071 in)
Crankshaft bearing
2 cylinder 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 two Eaton pumps
Primary transmission
24:73
Clutch
Multidisc clutch in oil bath/hydraulically activated
Transmission ratio
1st gear
14:32
2nd gear
16:26
3rd gear
20:25
4th gear
22:23
5th gear
25:22
6th gear
26:20
Alternator
12 V, 168 W
Ignition
Contactless controlled fully electronic ignition with digital igni-
tion adjustment
Spark plug
NGK LMAR9AI-8
Spark plug electrode gap
0.8 mm (0.031 in)
Cooling
Water cooling, permanent circulation of coolant by water pump
Starting aid
Kick starter and electric starter
21.1
Capacity - engine oil
Engine oil
1.20 l (1.27 qt.)
Engine oil (SAE 10W/50) (
Alternative engine oil for harsh
operating conditions and
increased performance
Engine oil (SAE 10W/60)
(00062010035) (
21.2
Capacity - coolant
Coolant
1.2 l (1.3 qt.)
Coolant (
Coolant (mixed ready to use) (