2002 YAMAHA WR 426F lock

2 - 38
SPECCABLE ROUTING DIAGRAM
EC240000
CABLE ROUTING DIAGRAM
1Hose guide
2Brake hose
3Regulator
4Fuel tank breather hose
5Oil tank breather hose
6Clamp
7Sub wire harness
8Tail light lead
9TPS (throttle position sensor) lead
0Neutral switch lead
AOil hose
BCylinder head breather hose
CHose holder
DCDI magneto lead
EClutch cable
FDecompression cable
GLights switch lead
HCarburetor breather hose
IOverflow hose
JCoolant reservoir tank breather hoseÅPass the fuel tank breather
hose behind handlebar, then
insert it into the steering shaft
hole.
ıPass the decompression
cable, regulator lead and lights
switch lead under where the oil
hose is attached.
ÇFasten the CDI magneto lead,
neutral switch lead and lights
switch lead to the frame with a
plastic locking tie.
ÎFasten the sub wire harness
and lights switch lead to the
frame in front of the protector
of the sub wire harness with a
plastic locking tie and cut off
the tie end.‰Pass the cylinder head
breather hose along the right
side of the oil tank breather
hose.
ÏFasten the sub wire harness
to the frame with a plastic
locking tie ends at the lower
left of the frame and cut off
the tie end. For fastening,
pass the plastic locking tie
through the upper holes in the
engine brackets.
ÌPass the sub wire harness
between the engine brackets.
ÓFasten the TPS lead (in the
sub wire harness) under the
frame so that it does not con-
tact the carburetor.

2 - 39
SPECCABLE ROUTING DIAGRAM
ÈMake sure that the TPS read
coupler does not go outside
the chassis.
ÔFasten the TPS lead under the
coupler to the frame with a
plastic locking tie.
Pass the carburetor breather
hoses and overflow hose
between the connecting rod
and cross tube (frame).
ÒFasten the neutral switch lead
and oil hose together with a
plastic locking tie and cut off
the tie end.
˜Fasten the cylinder head
breather hose with the hose
holder.
ˆFasten the neutral switch lead
to the frame with a plastic
band ends toward the rear of
the frame.ØFasten the neutral switch lead
and CDI magneto lead
together with a plastic band.
∏Pass the clutch cable through
the cable guide.
ŒPass the cylinder head
breather hose along the inner
side of the radiator pipe.
ÂPass the clutch cable between
the frame and radiator and
over the lower boss on the
radiator.
ÍPass the neutral switch lead
and CDI magneto lead through
the cable guide and over the
middle radiator mounting boss.
Then, pass the decompression
cable under the middle radia-
tor mounting boss and along
the left side of the neutral
switch lead and CDI magneto
lead.ÊPass the clutch cable through
the cable guide.
ËFit the brake hose into the
guides on the protector.
◊Fasten the ignition coil lead
(in the sub wire harness) on
the upper inside of the frame
and cut off the tie end.
„Pass the ignition coil lead (in
the sub wire harness) under
the cushion bracket (frame).
≈Fasten the ignition coil lead
(in the sub wire harness) to
the frame with a plastic lock-
ing tie and cut off the tie end.
ÁPass the carburetor breather
hoses, overflow hose and
coolant reservoir tank
breather hose so that all there
hoses do not contact the rear
shock absorber.

2 - 40
SPECCABLE ROUTING DIAGRAM
1Coolant reservoir tank
breather hose
2Clamp
3Ignition coil
4High tension cord
5CDI unit
6CDI unit band
7“ENGINE STOP” button
lead
8Throttle cable (pull)
9Throttle cable (return)
0Radiator (left)
ARadiator (right)
BDecompression cable
CCDI unit stay (frame)ÅFasten the coolant reservoir tank
breather hose and carburetor
breather hoses together with a
plastic locking tie.
ıFasten the ignition coil lead to the
frame with a plastic band.
ÇPass the ignition coil lead (in the
sub wire harness) so that it does
not contact the carburetor and
rear shock absorber and connect
it with the lead from the ignition
coil on the inside of the frame.
ÎFasten the ignition coil and
ground lead to the frame with the
bolt.
‰Pass the throttle cables over the
high tension cord.
ÏPass the throttle cables along the
outer side of the CDI unit leads.ÌFasten the CDI unit leads and
“ENGINE STOP” button lead to
the frame at the protector of the
CDI unit leads with a plastic lock-
ing tie.
ÓFit the boot over the coupler.
ÈPass the throttle cables between
the top radiator mounting boss
and middle radiator mounting
boss.
ÔPass the CDI unit lead and
“ENGINE STOP” button lead over
the top radiator mounting boss.
Pass the throttle cables and
“ENGINE STOP” button lead
through the cable guide.
ÒCross the pull and return throttle
cables before the radiator.
˜Insert the CDI unit band over the
CDI unit stay (frame) as far as
possible.

3 - 5
INSP
ADJ
EC350000
ENGINE
COOLANT LEVEL INSPECTION
WARNING
Do not remove the radiator cap 1, drain
bolt and hoses when the engine and radia-
tor are hot. Scalding hot fluid and steam
may be blown out under pressure, which
could cause serious injury.
When the engine has cooled, place a thick
towel over the radiator cap, slowly rotate
the cap counterclockwise to the detent.
This procedure allows any residual pres-
sure to escape. When the hissing sound
has stopped, press down on the cap while
turning counterclockwise and remove it.
CAUTION:
Hard water or salt water is harmful to the
engine parts. You may use distilled water, if
you can’t get soft water.
1. Place the machine on a level place, and
hold it in an upright position.
2. Inspect:
Coolant level
Coolant level should be between the
maximum a and minimum b marks.
Coolant level is below the “LOW” level
line → Add soft water (tap water) up to
the proper level.
3. Start the engine and let it warm up for
several minutes.
4. Turn off the engine and check the coolant
level again.
NOTE:
Before checking the coolant level, wait a few
minutes until the coolant settles.
LOWFULLCOOLANT
a
b
COOLANT REPLACEMENT
WARNING
Do not remove the radiator cap when the
engine is hot.
ENGINE/COOLANT LEVEL INSPECTION/
COOLANT REPLACEMENT

3 - 10
INSP
ADJCLUTCH ADJUSTMENT/
THROTTLE CABLE ADJUSTMENT
EC359020
CLUTCH ADJUSTMENT
1. Check:
Clutch lever free play a
Out of specification → Adjust.
Clutch lever free play a:
8 ~ 13 mm (0.31 ~ 0.51 in)
2. Adjust:
Clutch lever free play
NOTE:
Make minute adjustment on the lever side
using the adjuster 2.
After adjustment, check proper operation of
clutch lever. Clutch lever free play adjustment steps:
Loosen the locknuts 1.
Adjust the free play by changing their
tightening position.
Tighten the locknuts.
EC35A001
THROTTLE CABLE ADJUSTMENT
1. Check:
Throttle grip free play a
Out of specification → Adjust.
Throttle grip free play a:
3 ~ 5 mm (0.12 ~ 0.20 in)

INSP
ADJREGLAGE DE L’EMBRAYAGE/REGLAGE DES CABLES D’ACCELERATION
KUPPLUNG EINSTELLEN/GASZUGSPIEL EINSTELLEN
AJUSTE DEL EMBRAGUE/AJUSTE DEL CABLE DEL ACELERADOR
KUPPLUNG EINSTELLEN
1. Kontrollieren:
Kupplungszugspiel a
Unvorschriftsmäßig → Ein-
stellen.
Kupplungszugspiel am
Hebeldrehpunkt a
8–13 mm
2. Einstellen:
Kupplungszugspiel
HINWEIS:
Das Kupplungszugspiel mit der vor
dem Hebel liegenden Einstell-
schraube 2 feineinstellen.
Nach der Einstellung des Seilzug-
spiels die Funktion des Kupplungs-
hebels prüfen. Arbeitsschritte
Sicherungsmutter 1 lockern.
Das Spiel durch Veränderung
der Befestigungsposition ein-
stellen.
Sicherungsmuttern festziehen.
GASZUGSPIEL EINSTELLEN
1. Kontrollieren:
Gaszugspiel a
Unvorschriftsmäßig → Ein-
stellen.
Gaszugspiel am Gas-
drehgriff a
3–5 mm
REGLAGE DE L’EMBRAYAGE
1. Contrôler:
Jeu du levier d’embrayage a
Hors spécification → Régler.
Jeu du levier d’embrayage
a:
8 à 13 mm
(0,31 à 0,51 in)
2. Régler:
Jeu de levier d’embrayage
N.B.:
Faire un réglage plus fin du côté du
levier à l’aide du dispositif de réglage
2.
Après le réglage, contrôler de bon
fonctionnement du levier
d’embrayage. Etapes de réglage du jeu du levier
d’embrayage:
Desserrer le contre-écrou 1.
Régler le jeu en modifiant leur ser-
rage.
Serrer le contre-écrous.
REGLAGE DES CABLES D’ACCE-
LERATION
1. Vérifier:
Jeu à la poignée des gaz a
Hors spécification → Régler.
Jeu à la poignée des gaz
a:
3 à 5 mm (0,12 à 0,20 in)
3 - 10
AJUSTE DEL EMBRAGUE
1. Comprobar:
Juego libre de la palanca del
embrague a
Fuera de especificaciones →
Ajustar.
Juego libre de la palanca
del embrague a:
8 ~ 13 mm
(0,31 ~ 0,51 in)
2. Ajustar:
Juego libre de la palanca del
embrague
NOTA:
Realice un ajuste preciso en el lado de
la palanca utilizando el regulador 2.
Después de realizar el ajuste, com-
pruebe el correcto funcionamiento de
la palanca del embrague. Pasos de ajuste del juego libre de la
palanca del embrague:
Afloje la contratuerca 1.
Ajuste el juego libre cambiando
sus posiciones de apriete.
Apriete las contratuercas.
AJUSTE DEL CABLE DEL ACELE-
RADOR
1. Comprobar:
Juego libre de la empuñadura
del acelerador a
Fuera de especificaciones →
Ajustar.
Juego libre de la empuña-
dura del acelerador a:
3 ~ 5 mm (0,12 ~ 0,20 in)

3 - 11
INSP
ADJ
THROTTLE LUBRICATION
2. Adjust:
Throttle grip free play
Throttle grip free play adjustment steps:
Remove the throttle cable cap 1 and
throttle cable cover 2.
NOTE:
Before adjusting the throttle cable free
play, the engine idle speed should be
adjusted.
When the motorcycle is accelerating,
throttle cable #1 3 is pulled and throttle
cable #2 4 is pushed.
1st step:
Loosen the locknuts 5 on throttle cable #2.
Adjust the free play by changing their
tightening position.
2nd step:
Loosen the locknuts 6 on throttle cable #1.
Adjust the free play by changing their
tightening position.
Tighten the locknuts.
WARNING
After adjusting, turn the handlebar to
right and left and make sure that the
engine idling does not run faster.
Install the throttle cable cover and throttle
cable cap.
1
2
THROTTLE LUBRICATION
1. Remove:
Cover (throttle cable cap) 1
Cover (grip cap) 2
Throttle cable cap 3
2. Apply:
Lithium soap base grease
On the throttle cable end a.
3. Install:
Throttle cable cap
Screw (throttle cable cap)
Cover (grip cap)
Cover (throttle cable cap)
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)

3 - 12
INSP
ADJDECOMPRESSION LEVER ADJUSTMENT/
AIR FILTER CLEANING
DECOMPRESSION LEVER ADJUSTMENT
1. Check:
Decompression lever free play
2. Adjust:
Decompression lever free play
AIR FILTER CLEANING
NOTE:
Proper air filter maintenance is the biggest key
to preventing premature engine wear and
damage.
CAUTION:
Never run the engine without the air filter
element in place; this would allow dirt and
dust to enter the engine and cause rapid
wear and possible engine damage.Checking steps:
Remove the timing plug.
Turn the crankshaft counterclockwise to
align the T.D.C. mark a on the rotor with
the align mark b on the crankcase cover
when piston is at T.D.C. on compression
stroke.
Check the free play c.
Free play:
5 ~ 9 mm (0.20 ~ 0.35 in)
Adjustment steps:
Loosen the locknut 1.
Turn the adjuster 2 in or out until the
adjustment is suitable.
Tighten the locknut.
CAUTION:
After the adjustment, start the engine
and make sure that the engine does not
stop when the handlebars are turned
fully both ways. If the decompression
cable is too tense, the engine will stop by
the decompression system.