Yamaha YZ250(W)/W1, Owner'S Service Manual

Page: 242 / 596

4-12
ENG
CARBURETOR AND REED VALVE
EC465000
ASSEMBLY AND INSTALLATION
EC465173
Reed valve
1. Install:
9
Reed valve 1
9 Stopper (reed valve)
2
9 Screw (reed valve)
3
NOTE:
9 Install the reed valve with the reed valve bend-
ing as shown.
9 Note the cut
a
in the lower corner of the reed
and stopper plate.
c C
Tighten each screw gradually to avoid
warping.
1 Nm (0.1 m•kg, 0.7 ft•lb)
9 Valve stopper height
b
Out of specification
→
Adjust stopper/
Replace valve stopper.
Valve stopper height:
10.3 ~10.7 mm (0.406~0.421 in)
EC464600
Float
1. Inspect:
9 Float
1
Damage
→
Replace.
EC464701
Reed valve
1. Measure:
9 Reed valve bending
a
Out of specification
→
Replace.
Reed valve bending limit:
0.2 mm (0.008 in)
1P8-9-32-4a 4/10/06 1:53 PM Page 24