ENGINE
3-19
4. Measure:
• Engine idling speed
Out of specification
Regulate.
5. Adjust:
• Engine idling speed
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a. Turn the starter knob/idle screw “1” in the di-
rection of “a” or “b” to make an adjustment.
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ADJUSTING THE VALVE CLEARANCE
TIP
• This section is intended for those who have
basic knowledge and skill concerning the ser-
vicing of Yamaha motorcycles (e.g., Yamaha
dealers, service engineers, etc.). Those who
have little knowledge and skill concerning ser-
vicing are requested not to undertake inspec-
tion, adjustment, disassembly, or reassembly
only by reference to this manual. It may lead
to servicing trouble and mechanical damage.
• Make sure that the valve clearance is
checked or adjusted while the engine is cold
(at room temperature).
• While the valve clearance is checked or ad-
justed, make sure that the piston is positioned
in the top dead center (TDC).
1. Remove:
• Seat
• Side cover (left/right)
• Air scoop (left/right)
Refer to “GENERAL CHASSIS” on page 5-
1.
• Fuel tank
Refer to “FUEL TANK” on page 8-1.
• ECU
2. Remove:
• Spark plug
• Cylinder head cover
Refer to “CAMSHAFT” on page 6-11.
3. Remove:
• Timing mark accessing screw “1”
• Crankshaft end accessing screw “2”
• O-ring
4. Check:
• Valve clearance
Out of specification
Regulate.
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a. Turn the crankshaft counterclockwise with a
wrench.
b. Align the top dead center (TDC) mark “a” on
the rotor with the alignment mark “b” on the
crankcase cover.
Engine idling speed
1900–2100 r/min
Direction “a” Engine idling speed
De-
creases.
Direction “b” Engine idling speed
In-
creases.
1
b
a
Valve clearance (cold)
Intake
0.12–0.19 mm (0.0047–0.0075 in)
Exhaust
0.17–0.24 mm (0.0067–0.0094 in)
1
2
a
b
Содержание WR250F 2016
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Страница 16: ...LOCATION OF IMPORTANT LABELS 1 2 EUR ...
Страница 17: ...LOCATION OF IMPORTANT LABELS 1 3 AUS NZL ZAF ...
Страница 41: ...MULTI FUNCTION DISPLAY 1 27 ...
Страница 78: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25 ...
Страница 80: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27 ...
Страница 82: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29 ...
Страница 84: ...CABLE ROUTING DIAGRAM 2 31 EAS2GB7073 CABLE ROUTING DIAGRAM ...
Страница 86: ...CABLE ROUTING DIAGRAM 2 33 ...
Страница 88: ...CABLE ROUTING DIAGRAM 2 35 ...
Страница 90: ...CABLE ROUTING DIAGRAM 2 37 ...
Страница 92: ...CABLE ROUTING DIAGRAM 2 39 ...
Страница 94: ...CABLE ROUTING DIAGRAM 2 41 ...
Страница 96: ...CABLE ROUTING DIAGRAM 2 43 ...
Страница 98: ...CABLE ROUTING DIAGRAM 2 45 ...
Страница 142: ...ELECTRICAL SYSTEM 3 42 ...
Страница 152: ...CHASSIS 4 9 ...
Страница 162: ...FRONT WHEEL 5 8 1 1 ...
Страница 226: ...CHAIN DRIVE 5 72 ...
Страница 268: ...ELECTRIC STARTER 6 39 5 Install Bolt 1 O ring 2 TIP Apply the lithium soap based grease on the O ring New ...
Страница 290: ...OIL PUMP AND BALANCER GEAR 6 61 a 2 10 b 2 9 1 b 5 3 a 4 10 5 9 3 E c d 6 7 8 8 b 6 ...
Страница 296: ...GENERATOR AND STARTER CLUTCH 6 67 TIP Install the cover damper assembly with its mark a facing upward 1 a 3 3 2 4 ...
Страница 310: ...TRANSMISSION 6 81 ...
Страница 347: ...CHARGING SYSTEM 9 15 ...
Страница 351: ...LIGHTING SYSTEM 9 19 ...
Страница 359: ...COOLING SYSTEM 9 27 ...
Страница 391: ...FUEL PUMP SYSTEM 9 59 ...
Страница 392: ...ELECTRICAL COMPONENTS 9 60 EAS2GB7381 ELECTRICAL COMPONENTS EAS2GB7382 9 10 11 1 3 2 4 5 6 7 8 ...
Страница 394: ...ELECTRICAL COMPONENTS 9 62 12 11 10 2 3 1 6 7 4 5 8 9 ...
Страница 396: ...ELECTRICAL COMPONENTS 9 64 EAS2GB7383 CHECKING THE SWITCHES 4 1 3 2 E B S E B E B E E B B ...
Страница 397: ...ELECTRICAL COMPONENTS 9 65 1 Engine stop switch 2 Neutral switch 3 Clutch switch 4 Start switch ...
Страница 414: ...ELECTRICAL COMPONENTS 9 82 ...
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Страница 426: ...PRINTED IN JAPAN E PRINTED ON RECYCLED PAPER ...