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TECHNICAL SPECIFICATIONS – ENGINE 250 SX, EXC, 300 XC, EXC
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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
3
6
00B
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