20
TECHNICAL DATA
80
20.1
Engine
Design
1-cylinder 2-stroke engine, water-cooled, with reed intake and
exhaust control
Displacement
84.93 cm³ (5.1828 cu in)
Stroke
48.95 mm (1.9272 in)
Bore
47 mm (1.85 in)
Idle speed
1,400… 1,500 rpm
Crankshaft bearing
1 grooved ball bearing / 1 roller bearing
Conrod bearing
Needle bearing
Piston pin bearing
Needle bearing
Pistons
Aluminum cast
Piston rings
1 rectangular ring
Engine lubrication
Mixture oil lubrication
Primary transmission
19:66 straight cut spur gear
Clutch
Multidisc clutch in oil bath/hydraulically activated
Transmission
6-gear, claw shifted
Transmission ratio
1st gear
11:29
2nd gear
14:28
3rd gear
16:26
4th gear
19:26
5th gear
21:25
6th gear
20:21
Ignition
Moric Digital 2M1
Spark plug
NGK BR9 ECMVX
Spark plug electrode gap
0.60 mm (0.0236 in)
Cooling
Water-cooled
Starting aid
Kick starter
20.2
Engine tightening torques
Stop screw for adjustment cable
M4
4 Nm (3 lbf ft)
Loctite
®
243™
Locking cap screw
M5
8 Nm (5.9 lbf ft)
–
Screw, control flap, exhaust control
M5
8 Nm (5.9 lbf ft)
Loctite
®
243™
Screw, exhaust control cover
M5
6 Nm (4.4 lbf ft)
–
Screw, ignition system/stator
M5
6 Nm (4.4 lbf ft)
Loctite
®
222™
Screw, water pump wheel
M5
6 Nm (4.4 lbf ft)
Loctite
®
243™
Lock screw for control flap
M6
8 Nm (5.9 lbf ft)
Loctite
®
243™
Nut, centrifugal timer
M6
10 Nm (7.4 lbf ft)
Loctite
®
243™
Screw, alternator cover
M6
8 Nm (5.9 lbf ft)
–
Screw, clutch intermediate cover
M6
10 Nm (7.4 lbf ft)
–
Screw, clutch springs
M6
10 Nm (7.4 lbf ft)
–
Screw, cylinder head
M6
10 Nm (7.4 lbf ft)
–
Screw, engine case
M6x25
10 Nm (7.4 lbf ft)
–
Screw, engine case
M6x40
10 Nm (7.4 lbf ft)
–
Screw, engine sprocket cover
M6
10 Nm (7.4 lbf ft)
–
Screw, exhaust flange
M6
10 Nm (7.4 lbf ft)
Loctite
®
243™
Screw, intake flange/reed valve housing M6
10 Nm (7.4 lbf ft)
–
Screw, kick starter
M6
12 Nm (8.9 lbf ft)
Loctite
®
243™
Screw, outer clutch cover
M6
10 Nm (7.4 lbf ft)
–
Screw, shift drum locating
M6
10 Nm (7.4 lbf ft)
Loctite
®
243™
Screw, shift lever
M6
12 Nm (8.9 lbf ft)
Loctite
®
243™
Содержание 85 SX 17/14
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