125cc YBR 2015 - Problem Starting Bike

[Bikerdood]

Hey guys, I just want to thank you in advance for any advice, all is appreciated massively!

Ok so I have a 125cc yamaha Ybr 2015

I had a fall last season, and I've only just got the confidence to get back on the roads again, and fix my bike up

The front end took most of the damage, mostly the wheel and forks but that's not to hard to get my head around

So my main problem is my electric start button, when I turn the key I hear the fuel injection priming, then when I hit the button I get absolutely nothing, not even a sound

So I got the multimeter out I've checked the battery which is fine, then I bridged the starter relay which started the bike straight away

Any advice on what i should be looking for or checking would be greatly appreciated!

Edited June 18, 2020 by Bikerdood

[JRH]

Check the wires to the start button. Maybe broken or disconnected.

[Bikerdood]

Is there anyway to tell with a multimeter, I'm told the blue and white Carrys the 12v to the relay however it seemed to have considerably less

[dynax]

Has it got a side stand switch, is that working or been damaged, have you checked for continuity on the start switch itself, have you checked the kill switch

[Bikerdood]

Hi it has a stand switch it does not look damaged and still working, the bike doesn't have a stop switch, however I havent checked continuity on the start switch, please could you explain more on how I'd go about this, all I've tested for is voltage in the battery and the blue and white wire heading to the starter relay, I'm new with the multimeter all advice would be appreciated thank you

[dynax]

set the meter to the buzzer, place the electrodes on the switch contacts one on each and press the switch, if you have continuity the buzzer should sound,

[dynax]

You said the side stand switch is okay, did you try it with the stand up, some bikes won't start with the stand down

[Bikerdood]

Yes the bike is on centre stand so the side stand is always up, were would I find the switch contacts for the starter button, thank you

[dynax]

Might be easier to trace the wires from the switch, one should come from a fuse near the battery and the other will go to the starter relay

[dynax]

I haven't watched this video it just came up on a search i just did, might help you out a little bit

[Bikerdood]

I've been told the blue and white wire going into the starter relay should have 12v, assuming this is the correct wire I was only getting a reading of around 0.3v, I've included a picture of the wire I was testing, this is a connection block fitted to the front of the starter relay containing a fuse, the only fuse I have is the one on the starter relay, thank you

[Bikerdood]

I had just watched the video of him explaining it, and he has just over complicated absolutely everything and I cant follow him unfortunately, can a 12v test light be used to detect the problem any easier, as I have one lying around

[dynax]

Okay touch that wire with a probe and at the same time touch the positive side of the battery and press the switch, if the meter buzzes then you have continuity if not there is a break in the circuit somewhere

[WD-40]

If you can find the correct wiring diagram or workshop manual for your bike and post it, it would help a lot

[TimR]

When did the bike last run and have you charged the battery since ?

Check that you have a neutral light

Do you normally have to start the bike with the clutch in ?

If not try starting with clutch pulled in