GAS GAS MC 85 2023, Owner'S Manual

Page: 111 / 176

TECHNICAL DATA 20
109
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 Mixed lubrication
Primary transmission 20:64 straight cut spur gear wheel drive
Clutch Multidisc clutch in oil bath/hydraulically activated
Transmission 6-gear transmission, 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 Contactless controlled fully electronic ignition with digital
ignition adjustment
Spark plug NGK BR9 ECMVX
Spark plug electrode gap 0.60 mm (0.0236 in)
Cooling Water-cooled
Starting aid Kick starter lever
20.2 Engine tightening torques
Screw, adjusting lever M5x12 6 Nm (4.4 lbf ft)
Loctite ® 243™
Screw, clutch spring retainer M5 6 Nm (4.4 lbf ft)
Screw, control lever M5x12 6 Nm (4.4 lbf ft)
Loctite ® 243™
Screw, crankshaft speed sensor M5 6 Nm (4.4 lbf ft)
Loctite ® 243™
Screw, exhaust control bearing sup-
port
M5 6 Nm (4.4 lbf ft)
Loctite ® 243™
Screw, exhaust control cap M5 4 Nm (3 lbf ft)
Screw, exhaust control cover M5 4 Nm (3 lbf ft)
Screw, guide piece M5x12 6 Nm (4.4 lbf ft)
Loctite
®
243™
Screw, ignition system/stator M5 6 Nm (4.4 lbf ft)
Loctite ® 243™