Injector not working
 

Hi I have a yamaha ybr125 2008 I pulled bike apart to clean it up now it won't start ie theres no fuel coming through the injector I have tested the injector and replaced with new I have spark full charged battery . I even swapped the ecu from a running bike done all the test for voltage seems to be OK but still no fuel coming through fuel pump is OK its just the injector not active please help. I know ecu is ok so what else on these bikes makes injector work is there a sensor like throttle positioning sensor or what else scratching my head

its an XT forum here, mostly 600s, not YBR...


never mind, check that your fuel pump is working,

Pull the fuel hose off the injector and crank the engine. If fuel doesn't blast out at pressure, you have a fuel pump issue or something related to that.

Careful with the fuel. Put the hose into a bottle.

Now the Yamaha tech section bier