Hi, today I went to see how is my bike doing. But it didn't even start :D the starter is probably OK, my back light and horn works. But the rest is off. I checked the battery, it is fully charged. 

 

Any ideas? 

Not much there in your question to go by but best bet is to use the info that comes with the owners manual. try here and see if this helps.

https://www.manualslib.com/manual/1071083/Yamaha-Tricity-Mw125a.html?page=73

Thanks,  I did that already.  

To be more specific, 

I turn the key to the '' On ''  position,  and the only thing that happens is that I can hear the system starting,  the rear light goes on, and the horn is funkcional. 

Display does not turn on, head lights, el. Starter doesn't work, the brake lights don't work. 

I have checked the battery, if it is not out of power, but it is full. 

 

Could be as simple as a fuse is blown

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Ok that's better, right, next thing to try look at the earth wires on your bike(no I don't know where they are, look it up) but it sounds like a bad earth which is causing the problem. look at the battery and undo the earth cable, follow it to where it earths to the frame and clean around and under it, big dollop of copper grease to seal it and pretty sure that should fix it, remember to clean around the earth cable and the frame both on top and underneath. Just to be clear here UNDO the cable completely and make sure it's clean on both sides.

Problem fixed :D it was a blown fuse. Thanks guys!! 

Good to know, well done finnez, the simple things first usually works..!

Good to know, well done finnez, the simple things first usually works..! [emoji3]

I have my moments [emoji28]

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