Friday, 22 August 2014

Yamaha YZF R125 fuel injection system

    buy a haynes workshop manual from here 

the fuel injection system on the YZF R125 is straight forward and easy to work on

it have inbuilt diagnostics and you can also use the Yamaha FI diagnostic tool for greater
problem solving power .

See link here for more info on FI tool 

the fuel pump

you can test this by adding power to the terminals and listening to sound , or turn key and here pump prime , i like to test the fuel pressure too .

i use a home made tool to do this  

CDI oviously times the fuel injectors timing and opening duration 
these can go faulty but test all obvious first buy here if needed 

Throttle body with other input sensors you test all these components 

Other posts of interest .

Yamaha YZF R125 testing injector

Yamaha YZF R125 , Yamaha FI diagnostics Tool Scanner Machine

see more Yamaha YZF R125 blog posts 

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