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TECHNICAL SPECIFICATIONS – ENGINE 250 SX, EXC, 300 XC, EXC »
TIGHTENING TORQUES - ENGINE
Flange bolts - cylinder-head M8 27 Nm
Nuts-cylinder base M10 35 Nm
Flywheel collar nut M12x1 60 Nm
Flange bolt pump part (kickstarter) M6 Loctite 243 + 10 Nm
Nut for primary sprocket (LH thread) M18x1,5 Loctite 243 + 150 Nm
Nut for inner clutch hub M18x1,5 Loctite 243 + 100 Nm
Crankcase and cover bolts M6 10 Nm
Spark plug M14X1,25 25 Nm
Other screws M 6 10 Nm
M 8 25 Nm
M 10 45 Nm
BASIC CARBURETOR SETTING
250 SX
250 XC-W,
300 XC/XC-W,
250 EXC SIX-DAYS, 300 EXC SIX-DAYS
250/300 EXC-EU
250/300 EXC-AUS
(250: 6,6 KW 300: 9,2 KW)
Carburetor Keihin PWK 36 S AG Keihin PWK 36 S AG Keihin PWK 36 S AG
Carburetor setting mark FK0100 FK0080
3600B
Main jet 158 (155,160) 160 (162) 160 (162)
Idling jet 42 (40) 35 35
Starting jet 85 85 85
Jet needle N1EF (N1EG/N1EE) N3EH (N3EW) N3CJ (N8RF/N8RG)
Needle position from top III IV I
Throttle valve 6.5 7 7
Air adjustment screw open 1 1 3,5
Performance restrictor – – slide stop 38