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Honda CG125 Cold Start

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astroscope
Spanner Monkey



Joined: 11 Jul 2008
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PostPosted: 09:23 - 16 Sep 2008    Post subject: Honda CG125 Cold Start Reply with quote
Hi Guys,
I'm wondering if any owners of the CG125 are having this slight niggle. Niggle, as i mean it's not a problem, but rather, a little frustration.
After returning from work on Friday, i parked my bike out and switched off the fuel gauge, as described in the manual, and left the bike out until Monday morning.
The bike would not start unless the choke was fully on. As soon as the bike started, i switched off the choke and revved up and down a little to warm the engine. As soon as left the throttle, it just stalled. I had to go back and start it up and again and left the engine running a bit. It then began to be idle. As soon as I used the throttle it stalled again Sad. It kept doing this until i had to keep starting and warming the engine about 5 times... Very frustrating!
Is anyone else having this issue?

Update: Today, Tuesday, i started it again and left the engine running for 5 minutes. The bike was responsive as could be.
To me, in the cold, I think you have to leave this engine idle to a good 5 mins before taking it out.

Anyone else find this slight annoyance?
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Mr Hammers
World Chat Champion



Joined: 10 Jul 2008
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PostPosted: 09:34 - 16 Sep 2008    Post subject: Reply with quote
It takes a couple of minutes - well, the time it takes to get my backpack, lid and gloves on - on choke before the NSR is warmed up enough to ride, and then it's spluttery for a mile or so before it's starts to run properly sweet, so it doesn't sound that bad.

Have you tested your thermostat to see if it's working as it should? If it's not, that won't help your warmup times.
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astroscope
Spanner Monkey



Joined: 11 Jul 2008
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PostPosted: 09:38 - 16 Sep 2008    Post subject: Reply with quote
I haven't really checked anything. As the bike is on a 07 plate, i haven't really bothered checking anything. My negligence really.

Do you have a choke on your bike too? Do all bikes have chokes?
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Mr Hammers
World Chat Champion



Joined: 10 Jul 2008
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PostPosted: 10:59 - 16 Sep 2008    Post subject: Reply with quote
astroscope wrote:
I haven't really checked anything. As the bike is on a 07 plate, i haven't really bothered checking anything. My negligence really.

Do you have a choke on your bike too? Do all bikes have chokes?


Pretty much all (petrol) engines have chokes. i can't think of any that don't...but i won't say definitely as no doubt someone will come along and say "ha! a 1958 Yakazazumi XFGT50 doesn't have a choke!". Smile

The idea is that they restrict the air flow and enrich the fuel to help the engine start when it's cold. Otherwise it would struggle to fire up initially (as you've discovered).

To use them properly, you don't just turn it on, start the engine and then turn it off again...you have to let it warm up a bit and then turn off the choke. Some bikes take longer than others.

Anyway, as your bike is pretty new - and a Honda - i doubt whether there's anything wrong with your thermostat then.

If you do what i do, and that is start the bike on choke while you get ready to ride, then when you move off gradually turn off the choke as it gets warm you won't have that 5 minute wait.
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MarJay
But it's British!



Joined: 15 Sep 2003
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PostPosted: 11:17 - 16 Sep 2008    Post subject: Reply with quote
Mr Hammers wrote:


Pretty much all (petrol) engines have chokes. i can't think of any that don't...but i won't say definitely as no doubt someone will come along and say "ha! a 1958 Yakazazumi XFGT50 doesn't have a choke!". Smile


Well that is where you are wrong. All of the injected bikes I have owned have not had chokes. So just for me that would be:

Triumph Daytona 955i
Triumph TT600
Buell XB12R
Honda Fireblade
Triumph Speed Four

So thats five without me even listing every injected bike ever made! Very Happy

https://op-for.com/simpsons_nelson_haha2.jpg
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Cigaro
World Chat Champion



Joined: 28 Mar 2007
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PostPosted: 11:23 - 16 Sep 2008    Post subject: Reply with quote
What you have described sounds perfectly normal for a lot of bikes.

My Honda C90 would run fine if you turned the choke off straight after startup, but my Eliminator on the other hand...it's a warm blooded beast.

It needs full choke to start, then I normally back it off to about 3/4 (otherwise it revs its own bollocks off) and start riding. I only turn the choke off once I've gone a mile or two, otherwise it has a habit of dying.

I wouldn't worry about it - some engines just need it more than others, I think Thumbs Up
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astroscope
Spanner Monkey



Joined: 11 Jul 2008
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PostPosted: 11:54 - 16 Sep 2008    Post subject: Reply with quote
Thanks for your input guys...

I've noticed lately that there seems to be more bikes on the road than previously thought. I guess it's the cost of fuel and traffic and parking restrictions that getting people on the bikes now...

Happy riding... Very Happy
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Mr Hammers
World Chat Champion



Joined: 10 Jul 2008
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PostPosted: 13:11 - 16 Sep 2008    Post subject: Reply with quote
MarJay wrote:
So thats five without me even listing every injected bike ever made! Very Happy


Well, when i mentioned the 1958 Yakazazumi XFGT50, which is injected, naturally i meant that covered ALL injection models.......err.....yes.......yes....that's what i meant. Definitely. Yes. ..<cough>


https://www.planetash.net/img/doh.jpg

Very Happy
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I_Hate_Euro3
Two Stroke Sniffer



Joined: 09 Sep 2008
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PostPosted: 21:48 - 16 Sep 2008    Post subject: Re: Honda CG125 Cold Start Reply with quote
astroscope wrote:
Hi Guys,
I'm wondering if any owners of the CG125 are having this slight niggle. Niggle, as i mean it's not a problem, but rather, a little frustration.
After returning from work on Friday, i parked my bike out and switched off the fuel gauge, as described in the manual, and left the bike out until Monday morning.
The bike would not start unless the choke was fully on. As soon as the bike started, i switched off the choke and revved up and down a little to warm the engine. As soon as left the throttle, it just stalled. I had to go back and start it up and again and left the engine running a bit. It then began to be idle. As soon as I used the throttle it stalled again Sad. It kept doing this until i had to keep starting and warming the engine about 5 times... Very frustrating!
Is anyone else having this issue?

Update: Today, Tuesday, i started it again and left the engine running for 5 minutes. The bike was responsive as could be.
To me, in the cold, I think you have to leave this engine idle to a good 5 mins before taking it out.

Anyone else find this slight annoyance?


I have the same year Honda CG125 as you and the same problem.

Then I found the Honda CG125 website and it explained everything and how to sort it.

https://hondacg125.awardspace.com/

Look in the General page.

There are 3 sections in that page about the Choke.

After reading all 3 sections I had to set the Idle Mixture Screw and Idle Speed screw as per the websites instructions.
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Xenocide
Scooby Slapper



Joined: 17 Aug 2008
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PostPosted: 13:36 - 17 Sep 2008    Post subject: Reply with quote
CG125 is aircooled and so won't have a thermostat.
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