Cutting out at lights....

[Tamsin]

In the last few days the CG (2001, electric start, bog standard) has started to cut out every now and then at traffic lights.

Always when in first gear, engine at tickover, clutch full in, rear brake on. The engine just cuts, no jerk etc as if it was stalling on the clutch.

Its a bit of a sod having to then flick to neutral, restart and get moving again.

Any ideas folks?

[James83]

Faulty kickstand cutout?
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Jonathan A wrote: tart.

[Tamsin]

Given that it didn't come with side stand from the factory, I doubt there is a cut out....

[James83]

Next guess would be loose connection in the kill switch, assuming it came with one of those?
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Jonathan A wrote: tart.

[orac]

dodgy clutch switch?
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Current rides - 2016 Triumph Street Triple Rx, 1994 Suzuki Bandit 400 VM, TGB 204 Classic 125cc
"with nothing left to lose, there is everything to gain. It's not the size of the dog in the fight, it's the size of the fight in the dog"

[weasley]

[Tamsin]

Theres no kill switch

and it will only start in neutral after said stall. In normal situations it will start in gear.

[mudcow007]

does it happen when the bike is hot or cool etc?

[Tamsin]

Well, this morning it did it within minutes of starting out, yesterday it did it after about 10 minutes of riding (after about 3 hours stood)

So I guess cold/cool-ish. But i've not been on a long ride on it in a while

[Rogerborg]

Colour and condition of your spark plug? Have you adjusted the idle mixture, and idle speed?

Amount of free play at the clutch lever?
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[Tamsin]

I have to confess that I've not done anything to the mixture since I bought the bike, nor have I pulled the plug to have a look.

I did wonder whether it may be an issue with fuelling but that doesn't explain why I need to get it into neutral before I can restart...

When you say free play, I assume you mean easy movement before it "takes up the slack" and starts to pull the clutch? Very little indeed, I'll go give it a poke on my lunch break and report back though

[Rogerborg]

It does sound on the face of it like electrical, but a fouled plug, slow idle or well off mixture is easy to diagnose and something you should be checking for anyway since it's so easy on that bike.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[DrSnoosnoo]

On my super old CG ('81 vintage) it will cut out when it's cold out when stopped. I just increase my idle speed a touch or just keep a small amount of revs on while stopped.
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I'm Sam; Northern, Ginger, Lover
Did have: '95 ZZR600 '83 CG125 '97 ZZR1100 '15 Hypermotard 821 SP Do Have: '10 ZX10R

[map]

Have just thought if fuelling issue, choke isn't kept on is it?

I mention as had this once on lad's 125. Just cut out at roundabout after been riding for a little while. Found out choke was pulled out (on). May be of some use or unrelated, but at least then another possible eliminated.
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[Tamsin]

Nope, choke is only ever on for a short while while warming up and I get my lid & gloves on

ETA: free play in clutch lever about 15mm at lever end

[Tamsin]

I dont think I made it clear on reading back, its an intermittent thing

[Vincent]

So it's cutting out dead....as if you've turned the ignition off? Or is more like a stall?

When was the last time it had a new spark plug?
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Space Is Deep

[Tamsin]

I'd liken it more to the ignition being turned off than a stall.

No idea about how long the plug has been on there, I've had the bike since March and not changed it.

[Vincent]

Sounds likely to be electrical to me...either a loose or corroded wire somewhere or a dodgy plug cap maybe.

I've found that when this thing starts to happen, shortly after the bike will pack up completely......... so be prepared
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Space Is Deep

[Carvel]

scrap it
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2002 Aprilia RSV1000R, Cbr600Fs, Mk1 B12, Vfr400 NC30...

Matt B: I can deal with crushed nuts to beat Ollie.

[Flatbadger]

I had the same, my battery needed replacing. Try a good charge up first.
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[Tamsin]

Right, I have some ammo for things to look at/do so fingers crossed.

[Tamsin]

Well, I gave it a damned good going over at the weekend and dealt with a number of other issues...

Found loose battery connection, did it up again good and proper and pulled the plug for a look - judging by the plug colour shes a little bit rich but not excessively so. I used a standard socket to get the plug in and out, as none of my plug sockets would fit, so I've ordered the correct one and will have a play with the mixture when I get it.

Did a decent length ride afterwards and got her nice and hot, no problems at all until I was nearly home and she did the same thing again, cut out in at the lights - also the clutch started squealing like a pig and cutting in hard, rather than progressively (I think I've sorted that issue with clutch adjustment at the lever end though)