21 Technical Data; Engine - GAS GAS ES 700 2023 Owner's Manual

21 TECHNICAL DATA

21.1
Design
Displacement
Stroke
Bore
Compression ratio
Idle speed
Coolant temperature: ≥ 70 °C (≥ 158 °F)
Control
Valve diameter, intake
Valve diameter, exhaust
Valve play, cold
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
Transmission
Transmission ratio
First gear
Second gear
Third gear
Fourth gear
Fifth gear
Sixth gear
Mixture preparation
Ignition
Alternator
Spark plug
Inside spark plug
Outside spark plug
Spark plug electrode gap
Cooling
Starting aid
116

Engine

1-cylinder 4-stroke engine, water-cooled
692.7 cm³ (42.271 cu in)
80 mm (3.15 in)
105 mm (4.13 in)
12.7:1
1,650 ± 50 rpm
OHC, intake with cam levers, exhaust controlled by rocker
arm, chain drive
42 mm (1.65 in)
34 mm (1.34 in)
0.10 ... 0.15 mm (0.0039 ... 0.0059 in)
0.22 ... 0.27 mm (0.0087 ... 0.0106 in)
2 roller bearings
Slide bearing
Piston pin with DLC coating
Forged light alloy
1 compression ring, 1 lower compression ring, 1 oil ring
with spring expander
Semi-dry sump lubrication system with two trochoid
pumps
36:79
APTC™ antihopping clutch in oil bath/hydraulically oper-
ated
6-gear transmission, claw shifted
14:35
16:28
20:27
21:23
23:22
23:20
Electronic fuel injection
Contactless controlled fully electronic ignition with digital
ignition adjustment
12 V, 300 W
NGK LKAR9BI‑10
NGK LMAR7DI‑10
1.0 mm (0.039 in)
Water cooling, permanent circulation of coolant by water
pump
Starter motor, automatic decompression