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VALVES AND VALVE SPRINGS
5-29
h. Install the valve into the cylinder head.
i. Press the valve through the valve guide and
onto the valve seat to make a clear impres-
sion.
j. Measure the valve seat contact width “c”
again. If the valve seat contact width is out of
specification, reface and lap the valve seat.
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EAM30093
CHECKING THE VALVE SPRINGS
1. Measure:
•
Valve spring free length “a”
Out of specification
Replace the valve
spring.
EAM30094
CHECKING THE VALVE LIFTERS
1. Check:
•
Valve lifter
Damage/scratches
Replace the valve lift-
ers and cylinder head.
EAM30095
INSTALLING THE VALVES
1. Clean:
•
Valve stem end
2. Lubricate:
•
Valve stem “1”
•
Valve stem seal “2”
3. Install:
•
Spring seat “1”
•
Valve stem seal “2”
•
Valve “3”
•
Valve spring “4”
•
Valve spring retainer “5”
(to the cylinder head)
TIP
•
Make sure each valve is installed in its original
place.
•
Install the valve springs with the larger pitch “a”
Free length (intake)
40.57 mm (1.60 in)
Limit
38.54 mm (1.52 in)
Free length (exhaust)
37.42 mm (1.47 in)
Limit
35.55 mm (1.40 in)
Recommended lubricant
Molybdenum disulfide oil
New
Содержание YZ450FX 2019
Страница 7: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY ...
Страница 10: ......
Страница 12: ......
Страница 63: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 20 ...
Страница 66: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 23 ...
Страница 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25 ...
Страница 69: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 26 1 Connecting rod 2 Oil nozzle 3 Crankshaft ...
Страница 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27 ...
Страница 71: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 28 1 Connecting rod 2 Engine oil check bolt 3 Crankshaft 4 Oil pump ...
Страница 72: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29 ...
Страница 73: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 30 1 Oil filter element 2 Oil pump 3 Oil strainer ...
Страница 74: ...CABLE ROUTING DIAGRAM 2 31 EAM20152 CABLE ROUTING DIAGRAM ...
Страница 76: ...CABLE ROUTING DIAGRAM 2 33 ...
Страница 78: ...CABLE ROUTING DIAGRAM 2 35 ...
Страница 80: ...CABLE ROUTING DIAGRAM 2 37 ...
Страница 82: ...CABLE ROUTING DIAGRAM 2 39 ...
Страница 84: ...CABLE ROUTING DIAGRAM 2 41 ...
Страница 86: ...CABLE ROUTING DIAGRAM 2 43 ...
Страница 126: ...ELECTRICAL SYSTEM 3 38 ...
Страница 178: ...FRONT FORK 4 50 1 ...
Страница 196: ...CHAIN DRIVE 4 68 ...
Страница 265: ...CRANKCASE 5 66 4 45 mm 1 77 in 5 60 mm 2 36 in 6 75 mm 2 95 in 5 6 4 5 5 4 4 4 6 2 3 1 2 LT 5 6 ...
Страница 274: ...TRANSMISSION 5 75 ...
Страница 282: ...WATER PUMP 6 7 ...
Страница 295: ......
Страница 296: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM ...
Страница 300: ...ELECTRIC STARTING SYSTEM 8 5 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM ...
Страница 304: ...CHARGING SYSTEM 8 9 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM ...
Страница 307: ...CHARGING SYSTEM 8 12 ...
Страница 308: ...SIGNALING SYSTEM 8 13 EAM20154 SIGNALING SYSTEM EAM30348 CIRCUIT DIAGRAM ...
Страница 312: ...COOLING SYSTEM For JPN 8 17 EAM20155 COOLING SYSTEM For JPN EAM30350 CIRCUIT DIAGRAM ...
Страница 315: ...COOLING SYSTEM For JPN 8 20 ...
Страница 316: ...FUEL INJECTION SYSTEM 8 21 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM ...
Страница 341: ...FUEL INJECTION SYSTEM 8 46 ...
Страница 342: ...FUEL PUMP SYSTEM 8 47 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM ...
Страница 345: ...FUEL PUMP SYSTEM 8 50 ...
Страница 346: ...ELECTRICAL COMPONENTS 8 51 EAM20147 ELECTRICAL COMPONENTS 1 2 3 4 6 7 8 9 5 ...
Страница 348: ...ELECTRICAL COMPONENTS 8 53 1 2 3 4 5 11 10 6 7 8 9 ...
Страница 350: ...ELECTRICAL COMPONENTS 8 55 EAM30289 CHECKING THE SWITCHES Y W P Sb 3 1 4 2 P Sb B W R L B R Y W B ...
Страница 351: ...ELECTRICAL COMPONENTS 8 56 1 Engine stop switch 2 Mode switch 3 Gear position switch 4 Engine start switch ...
Страница 372: ...LIST OF SELF DIAGNOSTIC AND FAIL SAFE ACTIONS 9 7 ...
Страница 382: ...CHASSIS 10 9 ...
Страница 384: ......
Страница 387: ...YZ450FXK 2019 WIRING DIAGRAM B3J 28199 10_W D indd 1 2018 04 18 11 44 57 ...
Страница 388: ...YZ450FXK 2019 WIRING DIAGRAM B3J 28199 10_W D indd 2 2018 04 18 11 44 57 ...