Tuesday 7 April 2015

Yamaha YBR 125 How to test motorcycle relays














Testing a starter relay is quite easy.

basic equipment needed is 12v battery with 2 x wire i use

crocodile clips .

you can also use a small test bulb as well .


Buy Yamaha YBR 125 relays on Ebay UK here 



Yamaha YBR 125 How to test motorcycle relays



Yamaha YBR 125 How to test motorcycle relays

i always have a fully charged 12v battery with crocodile

 leads knocking about it saves loads of hassle 


Yamaha YBR 125 How to test motorcycle relays

The relay , the small terminals are what connect to your

 starter button and carry a lot less current .

the larger terminals are connected direct from battery to 

 starter motor so need larger wires to carry the massive

 starting currents .


Yamaha YBR 125 How to test motorcycle relays

Yamaha YBR 125 How to test motorcycle relays


I am using the powerprobe here as its safer but you can just as

 easily connect the 12v negative to one side and tap the

 positive on the other side you should hear a click as you

 touch the positive and remove it .


Yamaha YBR 125 How to test motorcycle relays

You can go a step further and add a test light to it and

 confirm current it going through the secondary circuit .




to test with a lamp you need to connect one end on test light

 circuit to battery positive and the to one of the relays larger

 terminals and then use another cable from second larger

 terminal to negative of battery ill do basic circuit diagrams

 at bottom of page.

Yamaha YBR 125 How to test motorcycle relays

Yamaha YBR 125 How to test motorcycle relays


Now when you put power to the smaller terminals it should click but also 
the light should flash on and off as you tap power .



OK not the best , never have been very good with Windows Paint 



Yamaha YBR 125 How to test motorcycle relays




1 comment:

  1. where is the relay located for thge fuel pump of a yamaha ybr 125 custom

    ReplyDelete