2014 Yamaha YZ250F Owner's Manual

2014 Yamaha YZ250F Owner's Manual
Posted on 16 Sep, 2015
Model: 2014 Yamaha YZ250F
Pages: 356


File size: 11 MB

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Manual Description
The main function of a fuel supply system is to provide fuel to the combustion chamber at the optimum air-fuel ratio in accordance with the engine operating conditions and the atmospheric temperature. 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 measures 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 engine.

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.

Manual Cover
2014 Yamaha YZ250F Owner's Manual Image


General
Year 2014
Make Yamaha
Model YZ250F
Language English
Pages 356
Filetype PDF (Download)
File size 11 MB

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