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53
TIGHTENING TORQUES
Flange bolts - cylinder-head M 8 35 Nm (25 ft.lb)
Nuts-cylinder base M 10 35 Nm (25 ft.lb)
Flywheel collar nut M 12x1 60 Nm (44 ft.lb)
Nut for primary sprocket (LH thread) M 18x1.5 Loctite 243 150 Nm (110 ft.lb)
Nut for inner clutch hub M 18x1.5 Loctite 243 100 Nm (74 ft.lb)
Crankcase and cover bolts M 6 8 Nm (6 ft.lb)
Swingarm pivot M 14 100 Nm (74 ft.lb)
Flat head screw release plate kickstarter M 6x16 Loctite 648 19 Nm (14 ft.lb)
Other screws M 6 10 Nm (7 ft.lb)
M 8 25 Nm (19 ft.lb)
M 10 45 Nm (33 ft.lb)
BASIC CARBURETOR SETTING
Carburetor
Carburetor setting number
Main jet
Idling jet
Starting jet
Jet needle
Needle position from top
Slide
Air adjustment screw open
Performance restrictor
Power jet nozzle
250/300 EXC
throttled
Keihin PWK 38 AG
120202
175 (182,185)
35 (48)
85
R 1475 J (N3CH/N3CW)
III
6.5
1.5
slide stop 34mm
–
250 EXC USA
Keihin PWK 38 AG
140202
182 (185)
48
85
N3CH (N3CW)
IV
6.5
1.5
–
–
300 EXC AUS
throttled
Keihin PWK 38 AG
130202
175 (172,178)
35 (45,48)
85
R1475J (NOZ H/NOZ I)
II
6.5
1.5
slide stop 34mm
–
Keihin PWK 38 AG
150202
175 (172,178)
45 (48)
85
NOZ H (NOZ I)
III
6.5
1.5
–
–
300 MXC / EXC
USA