VALVES AND VALVE SPRINGS
5-27
EAM30091
CHECKING THE VALVES AND VALVE
GUIDES
1. Measure:
•
Valve-stem-to-valve-guide clearance
Out of specification
Replace the valve
guide.
2. Replace:
•
Valve guide
TIP
To ease valve guide removal and installation,
and to maintain the correct fit, heat the cylinder
head to 100 °C (212 °F) in an oven.
a. Remove the valve guide with the valve
guide remover “1”.
b. Install the new valve guide with the valve
guide installer “1” and the valve guide re-
mover “2”.
c. After installing the valve guide, expand the
hole in the valve guide with the valve guide
reamer “3” to obtain the proper valve-
stem-to-valve-guide clearance.
TIP
After replacing the valve guide, reface the valve
seat.
Valve-stem-to-valve-guide clearance =
Valve guide inside diameter “a” -
Valve stem diameter “b”
Valve-stem-to-valve-guide clear-
ance limit (intake)
0.080 mm (0.0032 in)
Valve-stem-to-valve-guide clear-
ance limit (exhaust)
0.100 mm (0.0039 in)
1
2
4
5
3
Valve guide installation height “a”
Intake
10.8–11.2 mm (0.43–0.44 in)
Exhaust
11.2–11.6 mm (0.44–0.46 in)
1
2
2
2
1
1
Содержание YZ250FX 2022
Страница 6: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY ...
Страница 10: ......
Страница 44: ...MOTORCYCLE CARE AND STORAGE 1 32 ...
Страница 61: ...TIGHTENING TORQUES 2 16 ...
Страница 62: ...CABLE ROUTING DIAGRAM 2 17 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view ...
Страница 64: ...CABLE ROUTING DIAGRAM 2 19 Frame and engine right side view ...
Страница 66: ...CABLE ROUTING DIAGRAM 2 21 Handlebar front view ...
Страница 68: ...CABLE ROUTING DIAGRAM 2 23 Frame and engine top view ...
Страница 70: ...CABLE ROUTING DIAGRAM 2 25 Frame and battery top view ...
Страница 72: ...CABLE ROUTING DIAGRAM 2 27 Rear brake right side view ...
Страница 74: ...CABLE ROUTING DIAGRAM 2 29 ...
Страница 112: ...ELECTRICAL SYSTEM 3 36 ...
Страница 148: ...REAR BRAKE 4 34 system Refer to BLEEDING THE HYDRAULIC BRAKE SYSTEM on page 3 25 ...
Страница 154: ...HANDLEBAR 4 40 Throttle grip free play 3 0 6 0 mm 0 12 0 24 in ...
Страница 187: ...INSTALLING THE TRANSMISSION 5 74 ...
Страница 190: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Oil filter element 2 Oil pump ...
Страница 191: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 4 1 Intake camshaft 2 Exhaust camshaft ...
Страница 192: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 5 1 Camshaft 2 Oil pressure check bolt 3 Oil pump 4 Oil filter element ...
Страница 245: ...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 251: ...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 264: ...TRANSMISSION 5 77 ...
Страница 274: ...WATER PUMP 6 9 ...
Страница 284: ...THROTTLE BODY 7 9 ...
Страница 286: ...CHECKING THE INTAKE AIR TEMPERATURE SENSOR 8 58 CHECKING THE GEAR POSITION SWITCH 8 58 CHECKING THE INJECTOR 8 59 ...
Страница 287: ......
Страница 288: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM ...
Страница 292: ...ELECTRIC STARTING SYSTEM 8 5 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM ...
Страница 296: ...CHARGING SYSTEM 8 9 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM ...
Страница 299: ...CHARGING SYSTEM 8 12 ...
Страница 300: ...SIGNALING SYSTEM 8 13 EAM20154 SIGNALING SYSTEM EAM30348 CIRCUIT DIAGRAM ...
Страница 304: ...FUEL INJECTION SYSTEM 8 17 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM ...
Страница 329: ...FUEL INJECTION SYSTEM 8 42 ...
Страница 330: ...FUEL PUMP SYSTEM 8 43 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM ...
Страница 362: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15 ...
Страница 372: ...CHASSIS 10 9 ...
Страница 374: ......
Страница 376: ......
Страница 377: ...YZ250FXN 2022 WIRING DIAGRAM BAJ 2819U 12_WD indd 1 2021 06 08 11 03 51 ...
Страница 378: ...YZ250FXN 2022 WIRING DIAGRAM BAJ 2819U 12_WD indd 2 2021 06 08 11 03 52 ...