Bike Stalling at lights...

DynamiteBoy · Scooby Slapper Joined: 09 Oct 2005 Karma :

Hi Everyone, could someone please help me understand and hopefully rectify the following problem, any suggestions welcome.

Decided to ride my CG125 in to work this morning, first long run for a while..also first run since oil change. Little traffic around allowed me to ride constantly for a good 20 minutes.

Basically the bike stalled at the first junction i had to stop at - rev's just slowed right down and the engine stopped, i pulled over to one side and for a few minutes I was unable to select first gear, also the neutral light didn’t work. After a few minutes of waiting i was able to kick her up with no problems - where she quite happily idled over as if nothing happened. So i shot off....

Next Junction same started to happen but this time I managed to catch the throttle and keep her ticking over quite fast to prevent stalling and pissing off the many cars behind me...

Any help and advice is much appreciated..Thanks, Ow

LustyLew · World Chat Champion Joined: 19 Apr 2004 Karma :

sounds like carb icing. It's been quite cold the past few days.

What you need is some Silkolene Pro FST mixed with your petrol.

Friend of mine has a CG clone and gets the same problem. So you're not alone!
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veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

Lets all blame everything on carb icing...

:/

Could it be the fact the oils been changed and the bike being stood for a while causing the clutch plates to stick? Does it improve when the bikes warmed up? Get the bike on the centrestand, put it in 1st and pull the clutch in, does the wheel still move? How fast?

Carb icing is quite a rare problem as far as I know... Thought CG's had carb heaters anyway.

Black Knight · World Chat Champion Joined: 22 Feb 2005 Karma :

Did you do the oil change yourself?

You sure its got enough in it? Not too much either.
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DynamiteBoy · Scooby Slapper Joined: 09 Oct 2005 Karma :

Thanks for the reply’s guy's.

Yes i did change the oil my-self, I could have a little to much oil, just over the max, thought it'd be better than below.

Toby - the symptoms seem to get worse when warmed up, no probs at junctions for first 5 minutes of riding. As mentioned before the bike can be a bit tricky to start in morning, has to be choke fully OFF with a bit of throttle...

I'll have a look at the plug when i get home and post later if i see anything that might help.

veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

hedjehog · Nova Slayer Joined: 19 Nov 2005 Karma :

I had a thought about the petrol. How long has it been since you last rode her? Petrol 'goes off' and when I got mine it died under throttle before I put new fuel in. Also, silly but, has it got enough in it?

Not saying it is those things (I'm no mech wizz), but worth a look.

Thumbs Up

hedjehog
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~~1988 CG125 BRE~~; ~~2000 GPZ500S D7~~; ~~VFR 800 FI-X~~; ~~1980 CB 250 RSA~~; ~~1998 FZS 600 Fazer~~; 1986 Honda C70 E

sickpup · Old Timer Joined: 21 Apr 2004 Karma :

sickpup · Old Timer Joined: 21 Apr 2004 Karma :

DynamiteBoy · Scooby Slapper Joined: 09 Oct 2005 Karma :

I actually replaced the air oil foam filter not long ago when i first got the bike. Bought her cheap as a project over the winter in order to learn more about bike's in general i.e. mechanics, riding etc.

I’ve replaced the spark plug/air filter/oil/ blown bulbs/ cleaned up rust and ALSO took apart my carb for inspection - guessing my problems have arisen from this over confidence.

I might just take her to a local garage and see if they can 'tweak' balance the carb, does anyone have any experience how much this might cost.

She’s been a lovely introduction to the world of biking and i would love to sell her on in good shape to another learner in the near future as on her i have already become more confident and would like something a bit bigger - maybe 400....gonna book my theory this weekend and hopefully pass my DAS in spring...

nrml76 · Brolly Dolly Joined: 05 Nov 2005 Karma :

Superlight · Nitrous Nuisance Joined: 18 Jan 2006 Karma :

RickHolt · Traffic Copper Joined: 17 Mar 2004 Karma :

I had a similar problem with the bike dying when I stop this week. Make sure the choke is fully off while riding, if it's on it could be that to blame.

Rick.

faith183uk · Nitrous Nuisance Joined: 15 Sep 2005 Karma :

Sounds to me you need to adjust your clutch cable. Maybe as the bike is so light, as you pull up and hold the clutch in its not disengaging completely and the bike stalls out.

You would not feel the bike trying to edge foward very slightly as its so small.

DynamiteBoy · Scooby Slapper Joined: 09 Oct 2005 Karma :

DynamiteBoy · Scooby Slapper Joined: 09 Oct 2005 Karma :

GearboxGeezer · World Chat Champion Joined: 06 Sep 2005 Karma :

I had this problem, I changed my coil and it stopped doing this, dunno if its the same problem as you lough but maybe you could get your hands on a cheap old coil ?

sickpup · Old Timer Joined: 21 Apr 2004 Karma :

mr.z · World Chat Champion Joined: 04 Feb 2004 Karma :

Was it raining?

Mine used to stop at lights too, mostly when it rained..

When sparkplugs go old/bad they will play up more when cold, try checking the gaps, if not try replace the plug and plugcap (cheap enough)

(no offence but) For the love of gawd don't touch the carbs unless you know what your doing! Shocked

settings just dont go "wrong" unless they are messed with, an air leak is more likely (try spraying wd40 on any joins allong the air intakes)

You can't balance one carb btw Razz

its for when you have two carbs and you need to have them feeding equal ammounts of fuel into all cylinders, i.e. you need more than one cylinder Wink

Try spraying wd40 arorund the airway (it the revs rise then theres your leak), then check/replace the plugs...

(edit: just read your other thred, not haveing much luck eh? Sad

)
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bidman · Crazy Courier Joined: 01 Oct 2005 Karma :

hey, sorry to point out the basics but make sure that the choke is off and that the choke lever is nice and tight and not rattling shut, choking the engine, Dan Thumbs Up

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dotti · Scooby Slapper Joined: 18 Dec 2004 Karma :

I have the same problem on my GN, and I never have been able to get to the bottom of what causes it. What I have found, in my case, is that the problem is worse when putting the clutch straight in. If I run off the throttle, and let the bike engine brake for a few metres before using the clutch, then the bike very rarely stalls. If I put the clutch straight in, then the odds are the bike will stall.
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