YBR 125 stalled now not starting.

[zark]

So this morning, started the YBR (07 plate, FI) to warm it up a bit. (I always use the kick start as the electric one seems to drain the battery)

Was on the side stand, running quite happily. I hop on, kick stand up - engage 1st gear and it cuts out.

Thinking i've stalled it, i kick it to start it, and it starts and runs quite happily.

Get 1 mile up the road, and slowing on the approach to a junction, revs die to nothing. While i'm rolling, i let the clutch out to see if i can 'bump it' while still moving... Nothing. Slowly roll to a silent stop...

Many attempts to start at roadside on the kick - but nothing at all. Occasionally it might burble as if to start, but then dies straight away.

Lights still work and can hear the injector whirring if i turn key off and then on, just won't fire up on the kickstart.

Pushed it home, wiggled spark plug cap, seemed fine. Sprayed liberally with WD40 on the electric bits (it was raining). Still wouldn't start.

Running late for work, so leave it and get in the car.

So - as it was running beautifully last night, it's got to be either 'rain related' or something stopping the engine firing?

Is this how the side stand switch works? I never normally use the side stand. If the switch is buggered, would it stop the bike from starting even in neutral?

It was dark, raining and i was now late - so haven't looked at anything else yet - just wondered if this was an easy diagnosis?!

/TL:DR - was running - cut out - now won't start. Could it be side stand switch?

[monkeybiker]

Has it got any petrol

[zark]

Yarp... virtually full...

i did try releasing the filler cap, in case there was some sort of vapour lock - made no difference. Filled it up about 50 miles ago.

The only things different today (that i can think of) i used the side stand (i never normally do) and it was raining...

(But it was raining when i rode it home yesterday...

Which made me think - would a faulty sidestand switch stop it from starting, even in neutral with the clutch pulled in? (got into the habit of always pulling in the clutch to start, even if neutral light is on)

Not withstanding the possibility of a broken wire etc - but i got no flashing yellow 'engine' light...

Got me scratching my head a bit...

[flikers]

Yes, if the side stand switch is faulty and it thinks the stand is down it will make your bike cutout and then not restart.

[Taught2BCauti...]

The side stand switch would normally kill the engine if you select a gear and the side stand is down, but it shouldn't stop the bike from starting in neutral.

Sometimes, the clutch switch, neutral switch and side stand switch are electronically related, so you will need to get hold of a wiring diagram to work out what would happen if there's a fault somewhere.

My bike has a couple of diodes in the circuit, but yours might be different.
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[Rogerborg]

[Taught2BCauti...]

[chris-red]

Battery I bet. Charge/replace.
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[zark]

Whaddayaknow? Found a wiring diagram in the "Wiring Diagram Thread"!

But can't see the sidestand switch on it... i'll have a look in the Haynes manual when i get home.

Thanks for all the suggestions.. Knowing my luck it'll start fine later - and i'll be paranoid the sodding thing is going to do it again in the morning...

[bikertomm]

Errrr... you have checked you haven't knocked the kill switch right?
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[Rogerborg]

[Taught2BCauti...]

Mentioned in the 2007 & 2008 manuals..

[chris-red]

Woah, before you dig out wiring diagrams and go checking components charge the Battery.

Fuel injection can't run without power thats why it cuts out especially at low revs. You already said you battery won't turn the bike over.


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____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.

[zark]

So... Came home.

Battery showed 12.4 V. Spare battery on, measured 13.5 V.
Turned key. Kicked it, roared into life.

Fussakes...

Put lid on, went for a 20min spin, perfect. Got 10 yards from home, cut out.

Restarted on the start button. Went home. Left it idling. Cut out.
Panels off. WD40 everywhere. Spark plug out, seems OK. Not wet(?)
Plugged hole with spare plug. Held connected plug on frame and turned over... Spark seemed a weedy orange colour, but that might be my choice of earth? Deffo not fat and blue, if its supposed to be.

Went for another spin after putting it back together, no problems at all... I've either unwittingly fixed it, or its going to let me down big time in the morning!

Incidentally, I cleaned and lubed the side stand switch, but not convinced that's anything to do with it after it cut out this afternoon?

Fingers crossed, and thanks again for all the help guys

[sutty86]

Has the bike been okay since.
Mines playing up slightly like this
Dying whilst idling after a few minutes etc

[Taught2BCauti...]

[zark]

but in the meantime...

Yup - fresh battery and a liberal WD40 -ing has drowned whatever gremlins were lurking...

(I did remove seat and lift edge of tank up to get to the CDi, so i could wiggle and then spray it)

Since then - ridden without missing a beat through several downpours...

All is good again.