VALVES AND VALVE SPRINGS
5-28
3. Eliminate:
•
Carbon deposits
(from the valve face and valve seat)
4. Check:
•
Valve face
Pitting/wear
Grind the valve face.
•
Valve stem end
Mushroom shape or diameter larger than the
body of the valve stem
Replace the valve.
5. Measure:
•
Valve stem runout
Out of specification
Replace the valve.
TIP
•
When installing a new valve, always replace
the valve guide.
•
If the valve is removed or replaced, always re-
place the valve stem seal.
EAM30092
CHECKING THE VALVE SEATS
1. Eliminate:
•
Carbon deposits
(from the valve face and valve seat)
2. Check:
•
Valve seat
Pitting/wear
Replace the cylinder head.
3. Measure:
•
Valve seat contact width “a”
Out of specification
Replace the cylinder
head.
a. Apply blue layout fluid “b” onto the valve
face.
b. Install the valve into the cylinder head.
Intake
Valve guide remover (ø5)
90890-04097
Valve guide remover (5.0 mm)
YM-04097
Valve guide installer (ø5)
90890-04098
Valve guide installer (5.0 mm)
YM-04098
Valve guide reamer (ø5)
90890-04099
Valve guide reamer (5.0 mm)
YM-04099
Exhaust
Valve guide remover (ø4.5)
90890-04116
Valve guide remover (4.5 mm)
YM-04116
Valve guide installer (ø4.5)
90890-04117
Valve guide installer (4.5 mm)
YM-04117
Valve guide reamer (ø4.5)
90890-04118
Valve guide reamer (4.5 mm)
YM-04118
Valve stem runout
0.020 mm (0.0008 in)
Valve seat contact width limit (in-
take)
1.6 mm (0.06 in)
Valve seat contact width limit (ex-
haust)
1.6 mm (0.06 in)
Содержание WR250F 2022
Страница 5: ...EAM20093 YAMAHA MOTOR CORPORATION U S A WR MOTORCYCLE LIMITED WARRANTY...
Страница 8: ......
Страница 10: ......
Страница 41: ...MULTI FUNCTION DISPLAY 1 29...
Страница 62: ...ELECTRICAL SPECIFICATIONS 2 9 Radiator fan motor fuse 5 0 A Spare fuse 15 0 A...
Страница 70: ...CABLE ROUTING DIAGRAM 2 17 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view...
Страница 72: ...CABLE ROUTING DIAGRAM 2 19 Frame and engine right side view...
Страница 74: ...CABLE ROUTING DIAGRAM 2 21 Handlebar front view...
Страница 76: ...CABLE ROUTING DIAGRAM 2 23 Frame and engine top view...
Страница 78: ...CABLE ROUTING DIAGRAM 2 25 Frame and battery top view...
Страница 80: ...CABLE ROUTING DIAGRAM 2 27 Rear brake right side view...
Страница 82: ...CABLE ROUTING DIAGRAM 2 29 Front brake front view and right side view...
Страница 84: ...CABLE ROUTING DIAGRAM 2 31 Taillight top view and right side view...
Страница 86: ...CABLE ROUTING DIAGRAM 2 33...
Страница 131: ...GENERAL CHASSIS 4 5 a Projection b Slot c Rib side cover d Rib rear fender a a a 1 1 c c b b d d...
Страница 201: ...CHECKING THE SHIFT DRUM ASSEMBLY 5 73 CHECKING THE TRANSMISSION 5 73 INSTALLING THE TRANSMISSION 5 74...
Страница 204: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Oil filter element 2 Oil pump...
Страница 205: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 4 1 Intake camshaft 2 Exhaust camshaft...
Страница 206: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 5 1 Camshaft 2 Oil pressure check bolt 3 Oil pump 4 Oil filter element...
Страница 259: ...SHIFT SHAFT 5 58 TIP Align the punch mark a on the shift shaft with the punch mark b in the shift pedal 1 1 2 2 a b...
Страница 265: ...OIL PUMP 5 64 A Primary drive gear side B Crankcase cover side 5 7 mm 0 02 0 28 in 5 c d 6 8 b 8 6 7 E...
Страница 278: ...TRANSMISSION 5 77...
Страница 288: ...WATER PUMP 6 9...
Страница 298: ...THROTTLE BODY 7 9...
Страница 301: ......
Страница 302: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM...
Страница 306: ...ELECTRIC STARTING SYSTEM 8 5 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM...
Страница 312: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM...
Страница 315: ...CHARGING SYSTEM 8 14...
Страница 316: ...SIGNALING SYSTEM 8 15 EAM20154 SIGNALING SYSTEM EAM30348 CIRCUIT DIAGRAM...
Страница 320: ...LIGHTING SYSTEM 8 19 EAM20153 LIGHTING SYSTEM EAM30346 CIRCUIT DIAGRAM...
Страница 323: ...LIGHTING SYSTEM 8 22...
Страница 324: ...COOLING SYSTEM 8 23 EAM20155 COOLING SYSTEM EAM30350 CIRCUIT DIAGRAM...
Страница 327: ...COOLING SYSTEM 8 26...
Страница 328: ...FUEL INJECTION SYSTEM 8 27 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM...
Страница 353: ...FUEL INJECTION SYSTEM 8 52...
Страница 354: ...FUEL PUMP SYSTEM 8 53 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM...
Страница 388: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15...
Страница 398: ...CHASSIS 10 9...
Страница 400: ......
Страница 402: ......