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CG125 Suddenly Started Spluttering

Daigadget
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Daigadget

Daigadget

Posted
Posted

I have a 1983 Honda CG125. It's just had it's MOT and I've done about 300 miles with no issues in the last 4 weeks. Yesterday it just cut out - I thought perhaps it needed to go onto reserve but it usually splutters for a while beforehand and this didn't happen. I switched to reserve and it started - filled up with petrol 2 miles later. All was well until it just cut out when I stopped at a roundabout - I then had trouble starting it again (kick start). Had to fiddle around with the choke but seems to like being 'half way' at all times. It's now struggling in 3rd/4th gear and I have to change down and really push it to get it going. I filled up with premium petrol again in case it's a petrol sludge issue and pushed it hard down the dual carriageway for about 12 miles total yesterday. I've just taken it out again and it still seems spluttery in certain gears/ certain times, wanting to go down a gear and be pushed at high revs. Wondering if it could be the carburettor and if so - how I go about removing and cleaning it. Any advice most welcome!

Mississippi Bullfrog

Mississippi Bullfrog

Posted
Posted

If you had to switch to reserve when the problem started it sounds like a fuel blockage or contamination.


Best bet is to invest in a Haynes manual, they're pretty good at most of the basic stuff.

Guest

Guest

Posted
Posted
I filled up with premium petrol again in case it's a petrol sludge issue

 

BTW, what's "petrol sludge"?

fastbob

fastbob

Posted
Posted

Oh dear , looks like another one hit wonder . 🙄

  • 2 weeks later...
  • 7 months later...
Guest

Guest

Posted
Posted

2 posts - 2 (go on, count them)!


Petrol Sludge is sludge made with petrol (instead of any other liquid). :mrgreen:

Har-Har. But you're right. Can you get it in those squirt cans like Redex used to come in? 8-)

fastbob

fastbob

Posted
Posted

2 posts - 2 (go on, count them)!


Petrol Sludge is sludge made with petrol (instead of any other liquid). :mrgreen:

Har-Har. But you're right. Can you get it in those squirt cans like Redex used to come in? 8-)

 

Napalm ?

Guest

Guest

Posted
Posted

2 posts - 2 (go on, count them)!


Petrol Sludge is sludge made with petrol (instead of any other liquid). :mrgreen:

Har-Har. But you're right. Can you get it in those squirt cans like Redex used to come in? 8-)

 

Napalm ?

Not even a poor little CG125 deserves that..... gotta admit, I do have a soft spot for 'em..... That's just cruel.

fastbob

fastbob

Posted
Posted (edited)


Har-Har. But you're right. Can you get it in those squirt cans like Redex used to come in? 8-)

 

Napalm ?

Not even a poor little CG125 deserves that..... gotta admit, I do have a soft spot for 'em..... That's just cruel.

 

I have a soft spot too , I've rebuilt nine of them in the past . I've still got various bits in boxes that I just don't seem to be able to throw away . Here's a few of mine . The bottom one is still showing as on the road , no idea what became of the others.

IMG_20190404_210943623.thumb.jpg.8a047e3d46d8f0112af22f99155eed71.jpg

IMG_20190404_211003624.thumb.jpg.c65cc3fed00ce6ed8a426b7b21566b1d.jpg

IMG_20190404_211038354.thumb.jpg.08f1d62123158017154bb32348bf444a.jpg

Edited by fastbob
Guest Richzx6r

Guest Richzx6r

Posted
Posted

I have a 1983 Honda CG125. It's just had it's MOT and I've done about 300 miles with no issues in the last 4 weeks. Yesterday it just cut out - I thought perhaps it needed to go onto reserve but it usually splutters for a while beforehand and this didn't happen. I switched to reserve and it started - filled up with petrol 2 miles later. All was well until it just cut out when I stopped at a roundabout - I then had trouble starting it again (kick start). Had to fiddle around with the choke but seems to like being 'half way' at all times. It's now struggling in 3rd/4th gear and I have to change down and really push it to get it going. I filled up with premium petrol again in case it's a petrol sludge issue and pushed it hard down the dual carriageway for about 12 miles total yesterday. I've just taken it out again and it still seems spluttery in certain gears/ certain times, wanting to go down a gear and be pushed at high revs. Wondering if it could be the carburettor and if so - how I go about removing and cleaning it. Any advice most welcome!

 

Sounds terminal

Guest Richzx6r

Guest Richzx6r

Posted
Posted



Napalm ?

Not even a poor little CG125 deserves that..... gotta admit, I do have a soft spot for 'em..... That's just cruel.

 

I have a soft spot too , I've rebuilt nine of them in the past . I've still got various bits in boxes that I just don't seem to be able to throw away . Here's a few of mine . The bottom one is still showing as on the road , no idea what became of the others.

 

My first bike was a 2002 cg125 with the square headlight. Had a short 6 month life all at full throttle as I did believe I was Valentino rossi.......turns out I'm not

fastbob

fastbob

Posted
Posted

I have a 1983 Honda CG125. It's just had it's MOT and I've done about 300 miles with no issues in the last 4 weeks. Yesterday it just cut out - I thought perhaps it needed to go onto reserve but it usually splutters for a while beforehand and this didn't happen. I switched to reserve and it started - filled up with petrol 2 miles later. All was well until it just cut out when I stopped at a roundabout - I then had trouble starting it again (kick start). Had to fiddle around with the choke but seems to like being 'half way' at all times. It's now struggling in 3rd/4th gear and I have to change down and really push it to get it going. I filled up with premium petrol again in case it's a petrol sludge issue and pushed it hard down the dual carriageway for about 12 miles total yesterday. I've just taken it out again and it still seems spluttery in certain gears/ certain times, wanting to go down a gear and be pushed at high revs. Wondering if it could be the carburettor and if so - how I go about removing and cleaning it. Any advice most welcome!

 

Nothing you can do to a CG is terminal . Things to check are , the plug ( get a new one anyway ) HT lead and plug cap , air filter , petrol filter and any loose wiring. BUT before you do any of that you get a Haynes manual and read it . The CG is about as simple as a four stroke bike gets so it's an ideal place to start your journey to becoming a mechanic. Why not post pics in the Projects and Restoration section .

Smithers

Smithers

Posted
Posted

1983? When was the inside of the fuel tank looked at? It's possible there's an accumulation of crud in the tank that's not helping matters. Changing filters and stripping the carb could only be temporary cures until the crud (if any) works it way back again.

learningtofly

learningtofly

Posted
Posted

Can't really add to this thread, save to say that my first ever bike was a CG125 (orange), purchased around 1980. I do have a photo somewhere of me standing next to it, sporting a curly perm :thumb:

Hoggs

Hoggs

Posted
Posted
I do have a photo somewhere of me standing next to it, sporting a curly perm :thumb:

 

...I hope you are currently looking for this photo

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