2004 YAMAHA WR 250F lock

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Page 16 of 864

YAMAHA WR 250F 2004  Owners Manual ILLUSTRATED SYMBOLS 
(Refer to the illustration)
Illustrated symbols 1 to 7 are
designed as thumb tabs to indicate
the chapter’s number and content.
1General information
2Specifications
3Regular ins

Page 32 of 864

YAMAHA WR 250F 2004  Owners Manual 1 - 7
GEN
INFOIMPORTANT INFORMATION
EC133000GASKETS, OIL SEALS AND O-
RINGS
1. All gaskets, oil seals, and O-
rings should be replaced when
an engine is overhauled. All gas-
ket surfaces, oil seal lip

Page 76 of 864

YAMAHA WR 250F 2004  Owners Manual 1 - 51
GEN
INFO
EC1B0000
CLEANING AND 
STORAGE
EC1B1000CLEANING
Frequent cleaning of your machine
will enhance its appearance, main-
tain good overall performance, and
extend the life of many componen

Page 78 of 864

YAMAHA WR 250F 2004  Owners Manual 1 - 53
GEN
INFO
EC1B2001STORAGE
If your machine is to be stored for 60
days or more, some preventive mea-
sures must be taken to avoid deterio-
ration. After cleaning the machine
thoroughly, prepare i

Page 85 of 864

YAMAHA WR 250F 2004  Owners Manual MAINTENANCE SPECIFICATIONS
2 - 6
SPEC
Stem runout limit ---- 0.01 mm 
(0.0004 in)
Valve seat width IN 0.9 ~ 1.1 mm 
(0.0354 ~ 0.0433 in)1.6 mm 
(0.0630 in)
EX 0.9 ~ 1.1 mm 
(0.0354 ~ 0.0433 in)1.6 mm

Page 93 of 864

YAMAHA WR 250F 2004  Owners Manual MAINTENANCE SPECIFICATIONS
2 - 14
SPEC
NOTE:
1. First, tighten the steering nut approximately 38 Nm (3.8 m  kg, 27 ft  lb) by using the steering
nut wrench, then loosen the steering nut one turn.
2.

Page 94 of 864

YAMAHA WR 250F 2004  Owners Manual MAINTENANCE SPECIFICATIONS
2 - 15
SPEC
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Nipple (spoke)—72 3 0.3 2.2
Rear wheel sprocket M8 × 1.25 6 50 5.0 36
Rear brake disc

Page 178 of 864

YAMAHA WR 250F 2004  Owners Manual SPEC
2 - 99
CABLE ROUTING DIAGRAM
ÊFasten the diode, rectifier/regulator lead and AC magneto cou-
pler (connected to the CDI unit), with the diode at its white tape
and the rectifier/regulator lead a
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