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FEATURES
1-6
EAS20170
FEATURES
EAS1SM1014
OUTLINE OF THE FI SYSTEM
The main function of a fuel supply system is to provide fuel to the combustion chamber at the opti-
mum air-fuel ratio in accordance with the engine operating conditions and the atmospheric tempera-
ture. In the conventional carburetor system, the air-fuel ratio of the mixture to be supplied to the
combustion chamber is determined by the amount of intake air and fuel that is measured on the basis
of the jets to be used in the carburetor.
Despite the same amount of intake air, the fuel amount requirement varies with the engine operating
conditions (acceleration, deceleration, and operation under a heavy load). The carburetor that mea-
sures fuel through the use of jets are provided with various auxiliary devices, so that the optimum air
fuel ratio can be obtained to accommodate frequent changes in the operating conditions of the en-
gine. This model has adopted an electronically controlled fuel injection (FI) system, in place of the
conventional carburetor system. This system can obtain the optimum air-fuel ratio required by the
engine at all times by using a microprocessor that regulates the fuel injection amount according to
the engine operating conditions detected by various sensors.
EAS1SM1015
6
7
8
9
5
4
1 2 3
10
1. Fuel injector
2. Throttle position sensor
3. Intake air pressure sensor
4. Intake air temperature sensor
5. ECU
6. Fuel pump
7. Condenser
8. Crankshaft position sensor
9. Coolant temperature sensor
10.Ignition coil
Содержание YZ250F(E)
Страница 4: ......
Страница 10: ......
Страница 12: ......
Страница 16: ...LOCATION OF IMPORTANT LABELS 1 2 EUR...
Страница 17: ...LOCATION OF IMPORTANT LABELS 1 3 AUS NZL ZAF...
Страница 42: ...CLEANING AND STORAGE 1 28...
Страница 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25...
Страница 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27...
Страница 71: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 28 1 Exhaust camshaft 2 Intake camshaft 3 Oil filter element 4 Oil pump...
Страница 72: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29...
Страница 73: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 30 1 Camshaft 2 Oil pressure check bolt 3 Oil filter element 4 Oil pump...
Страница 74: ...CABLE ROUTING DIAGRAM 2 31 EAS1SM1064 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 190: ...CHAIN DRIVE 4 66...
Страница 250: ...OIL PUMP AND BALANCER GEAR 5 57 c d 6 6 7 8 8 b...
Страница 286: ......
Страница 293: ...CHARGING SYSTEM 8 7 EAS1SM1325 2 AC magneto 3 Rectifier regulator 4 Joint connector 5 Condenser...
Страница 295: ...CHARGING SYSTEM 8 9 EAS1SM1326...
Страница 321: ...FUEL PUMP SYSTEM 8 35 EAS1SM1333...
Страница 322: ...ELECTRICAL COMPONENTS 8 36 ELECTRICAL COMPONENTS EAS1SM1334 9 10 1 2 3 4 5 6 7 8...
Страница 324: ...ELECTRICAL COMPONENTS 8 38 CHECKING THE SWITCHES B Y P Sb 2 1...
Страница 325: ...ELECTRICAL COMPONENTS 8 39 1 Engine stop switch 2 Neutral switch...
Страница 334: ...ELECTRICAL COMPONENTS 8 48...
Страница 342: ...LIST OF SELF DIAGNOSTIC AND FAIL SAFE ACTIONS 9 7...
Страница 353: ......
Страница 354: ...PRINTED IN JAPAN E PRINTED ON RECYCLED PAPER...