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TECHNICAL DATA 21
127
21.1
Engine
Design
1-cylinder 2-stroke engine, water-cooled, with reed
intake, exhaust control and transfer duct injection
Displacement (250 XC TPI US)
249 cm³ (15.19 cu in)
Displacement (300 XC TPI US)
293.15 cm³ (17.8892 cu in)
Stroke
72 mm (2.83 in)
Hole (250 XC TPI US)
66.4 mm (2.614 in)
Hole (300 XC TPI US)
72 mm (2.83 in)
Exhaust valve, beginning of adjustment
5,500 rpm
Crankshaft bearing
1 grooved ball bearing/1 roller bearing
Conrod bearing
Needle bearing
Piston pin bearing
Needle bearing
Piston
Cast aluminum
Piston rings (250 XC TPI US)
2 half keystone rings
Piston rings (300 XC TPI US)
2 rectangular rings
X distance (upper edge of piston to upper edge of
cylinder)
0 … 0.10 mm (0 … 0.0039 in)
Z distance (height of control flap) (250 XC TPI US)
49.0 mm (1.929 in)
Z distance (height of control flap) (300 XC TPI US)
49.5 mm (1.949 in)
Primary transmission
26:73
Clutch
Multidisc clutch in oil bath/hydraulically activated
Transmission
6 gear transmission, claw shifted
Transmission ratio
first-gear
15:31
second-gear
16:25
third-gear
20:25
fourth-gear
22:23
fifth-gear
25:22
sixth-gear
26:20
Alternator
12 V, 196 W
Ignition system
Contactless controlled fully electronic ignition with
digital ignition adjustment
Spark plug
NGK BR 7 ES
Spark plug electrode gap
0.6 mm (0.024 in)
Starting aid
Electric starter system
21.2
Engine tightening torques
Screw, inner membrane sheets
EJOTDELTA PT
®
35x25
1 Nm (0.7 lbf ft)
Screw, membrane support plate
EJOTDELTA PT
®
30x12
1 Nm (0.7 lbf ft)
Screw, outer membrane sheets
EJOTDELTA PT
®
30x6
1 Nm (0.7 lbf ft)
Screw, angle lever, exhaust control
M5
6 Nm (4.4 lbf ft)
Loctite
®
243™
Screw, bearing retainer
M5
6 Nm (4.4 lbf ft)
Loctite
®
243™
Screw, clutch spring retainer
M5
6 Nm (4.4 lbf ft)
Содержание F6375T5
Страница 1: ...OWNER S MANUAL 2020 250 XC TPI 300 XC TPI Art no 3214002en...
Страница 2: ......
Страница 107: ...COOLING SYSTEM 15 105 Finishing work Check the coolant level p 102...