2001 YAMAHA WR 426F oil type

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SPECMAINTENANCE SPECIFICATIONS (WR400F)
Piston rings:
Top ring
Type Barrel ----
Dimensions (B ´ T) 1.2 ´ 3.5 mm (0.05 ´ 0.14 in) ----
End gap (installed) 0.20 ~ 0.35 mm
(0.008 ~ 0.014 in)0.6 mm
(0.024 in)
Side clearance (installed) 0.030 ~ 0.065 mm
(0.0012 ~ 0.0026 in)0.12 mm
(0.005 in)
2nd ring
Type Taper ----
Dimensions (B ´ T) 1.00 ´ 3.35 mm (0.04 ´ 0.13 in) ----
End gap (installed) 0.40 ~ 0.55 mm
(0.016 ~ 0.022 in)0.9 mm
(0.035 in)
Side clearance 0.020 ~ 0.055 mm
(0.0008 ~ 0.0022 in)0.12 mm
(0.005 in)
Oil ring
Dimensions (B ´ T) 2.0 ´ 2.9 mm (0.08 ´ 0.11 in) ----
End gap (installed) 0.2 ~ 0.5 mm (0.01 ~ 0.02 in) ----
Crankshaft:
Crank width “A” 61.95 ~ 62.00 mm
(2.439 ~ 2.441 in)----
Runout limit “C” 0.03 mm (0.0012 in) 0.05 mm
(0.002 in)
Big end side clearance “D” 0.15 ~ 0.45 mm
(0.0059 ~ 0.0177 in)0.50 mm
(0.02 in)
Small end free play “F” 0.4 ~ 1.0 mm (0.02 ~ 0.04 in) 2.0 mm
(0.08 in)
Balancer:
Balancer drive method Gear ----
Decompression device:
Type Manual ----
Cable free play 5 ~ 9 mm (0.20 ~ 0.35 in)
Air filter oil grade: Engine oil ----Item Standard Limit
T
B
B
T
B
T

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SPECMAINTENANCE SPECIFICATIONS (WR400F)
Lubrication system:
Oil filter type Wire mesh type ----
Oil pump type Trochoid type ----
Tip clearance “A” 0.12 mm or less
(0.0047 in or less)0.20 mm
(0.008 in)
Tip clearance “B” 0.09 ~ 0.17 mm
(0.0035 ~ 0.0067 in)0.24 mm
(0.009 in)
Side clearance 0.03 ~ 0.10 mm
(0.0012 ~ 0.0039 in)0.17 mm
(0.007 in)
Bypass valve setting pressure 40 ~ 80 kPa (0.4 ~ 0.8 kg/cm
2,
5.69 ~ 11.38 psi)----
Cooling:
Radiator core size
Width 117.8 mm (4.6 in) ----
Height 260 mm (10.2 in) ----
Thickness 32 mm (1.26 in) ----
Radiator cap opening pressure110 kPa (1.1 kg/cm
2, 15.6 psi)----
Radiator capacity (total) 0.76 L (0.67 lmp qt, 0.80 US qt) ----
Water pump
Type Single-suction centrifugal pump ----Item Standard Limit

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SPECMAINTENANCE SPECIFICATIONS (WR400F)
EC212201
CHASSIS
Item Standard Limit
Steering system:
Steering bearing type Taper roller bearing ----
Front suspension: USA, CDN
AUS, NZ, ZAEUROPE
Front fork travel 300 mm
(11.8 in)¬----
Fork spring free length 460 mm
(18.1 in)¬455 mm (17.9 in)
Spring rate, STD K = 4.51 N/mm
(0.46 kg/mm,
25.8 lb/in)K = 4.12 N/mm
(0.42 kg/mm,
23.5 lb/in)----
Optional spring/spacer Yes¬----
Oil capacity 573 cm
3
(20.2 lmp oz,
19.4 US oz) 583 cm3
(20.5 lmp oz,
19.7 US oz)----
Oil level 135 mm
(5.31 in)125 mm
(4.92 in)----

(From top of outer tube with inner
tube and damper rod fully com-
pressed without spring.)80 ~ 150 mm
(3.15 ~ 5.91 in)¬----
Oil grade Suspension oil
“01”¬----
Inner tube outer diameter 46 mm (1.81 in)¬----
Front fork top end Zero mm
(Zero in)¬----
Rear suspension: USA, CDN,
AUS, NZ, ZAEUROPE
Shock absorber travel 132 mm
(5.20 in)¬----
Spring free length 260 mm
(10.24 in)¬----
Fitting length 241 mm
(9.49 in)244 mm
(9.61 in)----
240.5 ~ 258.5 mm
(9.47 ~ 10.18 in)¬----
Spring rate, STD K = 49.0 N/mm
(5.00 kg/mm,
280.0 lb/in)K = 47.0 N/mm
(4.80 kg/mm,
268.8 lb/in)----
Optional spring Yes¬----
Enclosed gas pressure 1,000 kPa
(10 kg/cm
2,
142 psi)¬----
Swingarm:
Swingarm free play limit
End ---- 1.0 mm (0.04 in)

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SPECMAINTENANCE SPECIFICATIONS (WR400F)
EC212300
ELECTRICAL
Item Standard Limit
Ignition system:
Advancer type Electrical ----
CDI:
Magneto-model/manufacturer F5BF 00/YAMAHA ----
Source coil 1 resistance (color) 640 ~ 960 W at 20 ˚C (68 ˚F)
(Green – Brown)----
Source coil 2 resistance (color) 464 ~ 696 W at 20 ˚C (68 ˚F)
(Green – Pink)----
Lighting coil resistance (color) 0.16 ~ 0.24 W at 20 ˚C (68 ˚F)
(Black – Yellow)
Pickup coil resistance (color) 248 ~ 372 W at 20 ˚C (68 ˚F)
(White – Red)----
CDI unit-model/manufacturer 5GS-60/YAMAHA ----
Ignition coil:
Model/manufacturer 5BE-00/YAMAHA ----
Minimum spark gap 6 mm (0.24 in) ----
Primary winding resistance 0.20 ~ 0.30 W at 20 ˚C (68 ˚F) ----
Secondary winding resistance 9.5 ~ 14.3 kW at 20 ˚C (68 ˚F) ----
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Stator M6 ´ 1.0 3 10 1.0 7.2
Rotor M10 ´ 1.25 1 48 4.8 35
Ignition coil M6 ´ 1.0 2 7 0.7 5.1

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CARACTERISTIQUES D’ENTRETIEN (WR426F)SPEC
Roue:
Type de roue avant Roue à rayons ----
Type de roue arrière Roue à rayons ----
Taille/matériau de jante avant 21 ´ 1,60/aluminum ----
Taille/matériau de jante arrière 18 ´ 2,15/aluminum ----
Limite de voile de jante
Radial ---- 2,0 mm (0,08 in)
Latéral ---- 2,0 mm (0,08 in)
Chaîne de transmission:
Type/fabricant DID520VM/DAIDO ----
Nombre de maillons 113 maillons + attache ----
Flèche de la chaîne 40 à 50 mm (1,6 à 2,0 in) ----
Longueur de chaîne (10 maillons) ----150,1 mm (5,91 in)
Frein à disque avant:
Diamètre extérieur ´ épaisseur 250 ´ 3,0 mm (9,84 ´ 0,12 in) 250 ´ 2,5 mm
(9,84 ´ 0,10 in)
Epaisseur de plaquette 4,4 mm (0,17 in) 1 mm (0,04 in)
Diamètre intérieur de maître-cylindre 11,0 mm (0,433 in) ----
Diamètre intérieur de cylindre d’étrier 27,0 mm (1,063 in) ´ 2 ----
Type de liquide de frein DOT n˚4 ----
Frein à disque arrière:
Diamètre extérieur ´ épaisseur 240 ´ 4,0 mm (9,45 ´ 0,16 in) 240 ´ 3,5 mm
(9,45 ´ 0,14 in)
Limite de flèche ----0,15 mm (0,006 in)
Epaisseur de plaquette 6,4 mm (0,25 in) 1,0 mm (0,04 in)
Diamètre intérieur de maître-cylindre 12,7 mm (0,500 in) ----
Diamètre intérieur de cylindre d’étrier 27,0 mm (1,063 in) ´ 1 ----
Type de liquide de frein DOT n˚4 ----
Levier de frein et pédale de frein:
Position du levier de frein 95 mm (3,74 in) ----
Hauteur de la pédale de frein
(hauteur en dessous le haut du repose-pied)5 mm (0,20 in) ----
Jeu de levier d’embrayage (au pivot du levier) 2 à 4 mm (0,08 à 0,16 in) ----
Jeu à la poignée d’accélération 3 à 5 mm (0,12 à 0,20 in) ----Article Standard Limite

2 - 31
CARACTERISTIQUES D’ENTRETIEN (WR400F)SPEC
Roue:
Type de roue avant Roue à rayons ----
Type de roue arrière Roue à rayons ----
Taille/matériau de jante avant 21 ´ 1,60/aluminum ----
Taille/matériau de jante arrière 18 ´ 2,15/aluminum ----
Limite de voile de jante
Radial ---- 2,0 mm (0,08 in)
Latéral ---- 2,0 mm (0,08 in)
Chaîne de transmission:
Type/fabricant DID520VM/DAIDO ----
Nombre de maillons 113 maillons + attache ----
Flèche de la chaîne 40 à 50 mm (1,6 à 2,0 in) ----
Longueur de chaîne (10 maillons) ----150,1 mm (5,91 in)
Frein à disque avant:
Diamètre extérieur ´ épaisseur 250 ´ 3,0 mm (9,84 ´ 0,12 in) 250 ´ 2,5 mm
(9,84 ´ 0,10 in)
Epaisseur de plaquette 4,4 mm (0,17 in) 1 mm (0,04 in)
Diamètre intérieur de maître-cylindre 11,0 mm (0,433 in) ----
Diamètre intérieur de cylindre d’étrier 27,0 mm (1,063 in) ´ 2 ----
Type de liquide de frein DOT n˚4 ----
Frein à disque arrière:
Diamètre extérieur ´ épaisseur 240 ´ 4,0 mm (9,45 ´ 0,16 in) 240 ´ 3,5 mm
(9,45 ´ 0,14 in)
Limite de flèche ----0,15 mm (0,006 in)
Epaisseur de plaquette 6,4 mm (0,25 in) 1,0 mm (0,04 in)
Diamètre intérieur de maître-cylindre 12,7 mm (0,500 in) ----
Diamètre intérieur de cylindre d’étrier 27,0 mm (1,063 in) ´ 1 ----
Type de liquide de frein DOT n˚4 ----
Levier de frein et pédale de frein:
Position du levier de frein 95 mm (3,74 in) ----
Hauteur de la pédale de frein
(hauteur en dessous le haut du repose-pied)5 mm (0,20 in) ----
Jeu de levier d’embrayage (au pivot du levier) 2 à 4 mm (0,08 à 0,16 in) ----
Jeu à la poignée d’accélération 3 à 5 mm (0,12 à 0,20 in) ----Article Standard Limite

3 - 7
INSP
ADJ
COOLANT REPLACEMENT
9. Fill:
lRadiator
lEngine
To specified level.
CAUTION:
lDo not mix more than one type of ethyl-
ene glycol antifreeze containing corro-
sion inhibitors for aluminum engine.
lDo not use water containing impurities or oil.
Recommended coolant:
High quality ethylene glycol
anti-freeze containing
anti-corrosion for
aluminum engine
Coolant 1 and water
(soft water) 2 mixing ratio:
50%/50%
Coolant capacity:
1.2 L (1.06 Imp qt, 1.27 US qt)
Handling notes of coolant:
The coolant is harmful so it should be han-
dled with special care.
WARNING
lWhen coolant splashes to your eye.
Thoroughly wash your eye with water
and see your doctor.
lWhen coolant splashes to your clothes.
Quickly wash it away with water and
then with soap.
lWhen coolant is swallowed.
Quickly make him vomit and take him
to a doctor.
10. Install:
lRadiator cap
11. Fill:
lCoolant reservoir tank
Midway a between maximum and min-
imum marks on the tank.
LOWFULLCOOLANTa

3 - 15
INSP
ADJ
4. Inspect:
lOil level
Oil level should be between maximum
a and minimum b marks.
Oil level low ® Add oil to proper level.
NOTE:
When inspecting the oil level, do not screw the
oil level gauge into the oil tank.
Insert the gauge lightly.
(For USA and CDN)
CAUTION:
lDo not add any chemical additives.
Engine oil also lubricates the clutch and
additives could cause clutch slippage.
lDo not allow foreign material to enter the
crankcase.
(Except for USA and CDN)
CAUTION:
lDo not add any chemical additives or use
oils with a grade of CD a or higher.
lDo not use oils labeled “ENERGY CON-
SERVING II” b or higher. Engine oil also
lubricates the clutch and additives could
cause clutch slippage.
lDo not allow foreign materials to enter the
crankcase.
Recommended oil:
At 5 ˚C (40 ˚F) or higher
Yamalube 4 (20W-40) or SAE
20W-40 type SH motor oil
(Non-Friction modified)
At 15 ˚C (60 ˚F) or lower õ
Yamalube 4 (10W-30) or SAE
10W-30 type SH motor oil
(Non-Friction modified)
and/or
Yamalube 4-R (15W-50)
(Non-Friction modified)
Recommended oil:
Refer to the following chart for
selection of oils which are suited
to the atmospheric temperatures.
Recommended engine oil classi-
fication:
API STANDARD:
API “SH” or higher grade
(Designed primarily for motor-
cycles)-20
-4-10
140
3010
5020
6830
8640 50
104
122¡CTemp.
¡F
10W-30
10W-40
20W-40
20W-50
15W-40
a
b
ENGINE OIL LEVEL INSPECTION