check engine YAMAHA WR 426F 2001 Owner's Manual

YAMAHA WR 426F 2001 Owner's Manual WR 426F 2001 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52439/w960_52439-0.png YAMAHA WR 426F 2001 Owner's Manual

Page 524 of 762

YAMAHA WR 426F 2001 Owners Manual 4 - 95
ENGCRANKCASE AND CRANKSHAFT
REMOVAL POINTS
Crankcase
1. Separate:
lCrankcase (right)
lCrankcase (left)
Separation steps:
lRemove the crankcase bolts, hose guide
and clutch cable holder.
NOTE:
L

Page 534 of 762

YAMAHA WR 426F 2001 Owners Manual 4 - 100
ENGCRANKCASE AND CRANKSHAFT
6. Tighten:
lHose guide 1 
lClutch cable holder 2 
lBolt (crankcase)
NOTE:
Tighten the crankcase tightening bolts in
stage, using a crisscross pattern.
T R..12 Nm (

Page 544 of 762

YAMAHA WR 426F 2001 Owners Manual 4 - 105
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
5. Install:
lShift fork 1 (L) 1 
lShift fork 2 (C) 2 
lShift fork 3 (R) 3 
lShift cam 4 
To main axle and drive axle.
NOTE:
lApply the molybdenum disu

Page 632 of 762

YAMAHA WR 426F 2001 Owners Manual 5 - 44
CHASHANDLEBAR
5. Install:
lThrottle cable cap 1 
lScrew (throttle cable cap) 2 
lCover (throttle cable cap) 3 
WARNING
After tightening the screws, check that the
throttle grip 4 moves smoothly

Page 684 of 762

YAMAHA WR 426F 2001 Owners Manual  
6 - 3
–+ELEC
 
IGNITION SYSTEM 
EC620000 
IGNITION SYSTEM 
INSPECTION STEPS 
Use the following steps for checking the possibility of the malfunctioning engine being attributable to
ignition system

Page 688 of 762

YAMAHA WR 426F 2001 Owners Manual  
6 - 4
–+ELEC
 
IGNITION SYSTEM 
EC622001 
SPARK GAP TEST 
1. Disconnect the spark plug cap from spark
plug.
2. Connect the dynamic spark tester  
1  
(ignition checker  
2  
) as shown. 
l 
Spark

Page 694 of 762

YAMAHA WR 426F 2001 Owners Manual 6 - 7
–+ELECTPS (THROTTLE POSITION SENSOR) SYSTEM
EC69000
TPS (THROTTLE POSITION SENSOR) SYSTEM
INSPECTION STEPS
If the TPS will not operate, use the following inspection steps.
*marked: Refer to

Page 710 of 762

YAMAHA WR 426F 2001 Owners Manual  
7 - 1
TUN
 
EC700000 
TUNING 
EC710000 
ENGINE 
Carburetor setting 
l 
The air/fuel mixture will vary depending on
atmospheric conditions. Therefore, it is nec-
essary to take into consideration the

Page 712 of 762

YAMAHA WR 426F 2001 Owners Manual  
7 - 2
TUN
CAUTION:
 
l 
The carburetor is extremely sensitive to
foreign matter (dirt, sand, water, etc.).
During installation, do not allow foreign
matter to get into the carburetor. 
l 
Always han

Page 728 of 762

YAMAHA WR 426F 2001 Owners Manual 7 - 10
TUNSETTING
Examples of carburetor setting depending on symptom
This should be taken simply for an example. It is necessary to set the carburetor while checking
the operating conditions of the e
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