KTM EXC Repair Manual page 96

9-13C
TIGHTENING TORQUES
Flange bolts - cylinder-head
Nuts-cylinder base
Flywheel collar nut
Nut for primary sprocket (LH thread)
Nut for inner clutch hub
Crankcase and cover bolts
Swingarm pivot
Flat head bolt release plate kickstarter
Other bolts
TOLERANCES AND FITTING CLEARANCES
Piston fitting clearance
Piston ring end gap
Connecting rod bearing - radial clearance
Transmission shafts end float
Clutch springs - length
GASKET THICKNESSES
Crankcase
Clutch cover
Cylinder bottom gasket
Available cylinder bottom gaskets
Cylinder-head gasket
BASIC CARBURETOR SETTING
Carburetor Keihin PWK 38 AG PJ
Carburetor setting number
Main jet 172 (170,175)
Idling jet 48 (45,50)
Starting jet
Jet needle NOZ E (NOZ F)
Needle position from top
Throttle valve
Air adjustment screw open
Performance restrictor
Power jet jet
250 SX 250 MXC, EXC
Keihin PWK 38 AG
110499 130499
180 (178,182)
45 (48)
85 85
NOZ G (NOZ H)
III III
7 6
1,5 1,5
– –
55 –
M 8
M 10
M 12x1
M 18x1.5 Loctite 243 150 Nm (110 ft.lb)
M 18x1.5 Loctite 243 100 Nm (74 ft.lb)
M 6
M 14
M 6x16 Loctite 648 19 Nm (14 ft.lb)
M 6
M 8
M 10
0.05 mm (250) 0.06 mm (300)
0.3 – 0.4 mm
0.021 – 0.032 mm
0.1 – 0.2 mm
Ø 2.5 new = 43 mm, minimum length = 42 mm
0.5 mm
0.5 mm
as required
0.2/0.4/ 0.5 / 0.75 mm
O-rings
300 MXC, EXC
Keihin PWK 38 AG Keihin PWK 38 AG
140499
175 (172,178)
45 (48)
85
NOZ H (NOZ I)
III
6
1,5
–
–
35 Nm (25 ft.lb)
35 Nm (25 ft.lb)
60 Nm (44 ft.lb)
8 Nm (6 ft.lb)
100 Nm (74 ft.lb)
10 Nm (7 ft.lb)
25 Nm (19 ft.lb)
45 Nm (33 ft.lb)
0.08 mm (380)
250/300 EXC
380 SX, MXC, EXC
throttled
Keihin PWK 38 AG
150499 050799
170 (168,172) 175
45 (48)
85
NOZ H (NOZ I) R 1475 J
III
6
1,5 1,5
– slide stop 34mm
–
35
85
III
6
–