CG125 jerks forward a bit when put in gear when cold:

[deanoet]

is this right?

Start it up in neutral, clutch in, and put it into first, and it jerks forwards a little bit. It doesnt try to pull forward, it is almost like it engages for a split second then stops.

Have tried it on the stand, and the wheel doesnt turn when the clutch is pulled in and it is in gear, so the clutch is disengaging okay.

When it is just switched on as well so still a bit cold, it also stalls when put into gear, even with the clutch in, surely nothing is engageing with the engine, so there is no extra strain on it?

It only tends to do it when cold, once warmed up it doesnt do it at all.


New bike with 100 miles on the clock so wear and tear shouldnt be a problem. If this isnt normal i will give honda a ring tomorrow and see what they say.
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CBT Passed 18th July 2007 : Previous Bikes> CG125 : Current Bike> Hornet 600 : PASSED DAS 30th Oct 2007
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[2t-Screamer]

every geared bike ive ever had (quite a few) has jerked when i put it into 1st on a cold engine, i wouldnt worry about it, i think its something to do with the clutch plates sticking together when there cold? although im sure somebody will correct me lol
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[Jamie S]

All of my bikes do it as well.

[deanoet]

wow, 4 minute response time...


Thanx, puts my mind at rest.
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CBT Passed 18th July 2007 : Previous Bikes> CG125 : Current Bike> Hornet 600 : PASSED DAS 30th Oct 2007
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[2t-Screamer]

[Spoon261]

deanoet

I have got the same Honda CG125 as you, the latest model

I am trying to work out if what you describe is normal or not.
I need more information, but before I ask, can you have a look at my Honda CG125 website, since that explains lots of the choke related quirks of the latest model.

Choke information is on the General webpage of my site

https://hondacg125.awardspace.com/

[Spoon261]

deanoet

I am slightly more away now (last post 3:25am).

When you have looked at my website, I believe the bike stalling when cold fault was due to the bike having the choke turned off to soon, its was almost ready to have the choke turned off and would seem ok idling, but as soon as you put it in gear it would stall.

The slight jerk when you put the bike in to gear, is probably normal, I have been riding for over 13 years now and my brain probably does not even register it anymore, since as people have said all their bikes do it.
But if it’s excessive, theirs something needed to be done.

Your engine is still new, only 100 miles so it’s no ware near run in, this could be affecting things.

The only things I can think of are clutch leaver might need the free play screw adjusting and the idle speed might need to be turned up, both are on my website in the servicing section.

[Trixie]

Before engaging gear for the first time, try holding in the clutch a few times beforehand. See if that helps.
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Dead nobodies in company cars...

[Rookie]

[veeeffarr]

[Spoon261]

Toby R

I see you had the 2001 Model Honda CG125, according to the motorcycle news review of the new model “have a vastly improved gearbox” compared to the old model.

https://www.motorcyclenews.com/MCN/bikereviews/searchresults/Bike-Reviews/Honda/Honda-CG125-1975-current/?&R=EPI-301

I have had no problems with the clutch when cold.
Never in over 10,000 miles, had the bike from new.

I would not change the oil at 100 miles without the advice from a dealer.
Their may be a special polishing oil in their to help the bike run in.

Chain tension, if its so far out its causing trouble at 100 miles, I would be amazed.
The Chain is an O ring type, not some cheap load of rubbish.

I did have to tighten it up a very few times when it was new, but it only slackened slightly, then I went for well over 5000 miles without having to adjust it.

The only way I could possibly imagine the chain has stretched allot at 100 miles is if the person is heavy and thrashing the bike.

But of course it’s always a good idea to check the chain tension, especially when its new and settling in.

The old model Honda CG125 might have had a lesser chain, non O ring? That would effect things. They cost a fraction of the price of an O ring and also last a fraction of the time.

[veeeffarr]

Didn't read the bit about it only doing 100 miles. Still, I wouldn't say it was a problem at all, it's happened on every bike I've owned.

T

[Spoon261]

[veeeffarr]

It's just the cold oil causing the plates to stick together

[veeeffarr]

Regarding the cutting out, you're not putting it into first with the sidestand still down are you? (Mind you, I can't remember my CG having a sidestand...)

T

[KLR600]

[Spoon261]

[Trixie]

I used to get this on my old CB, as I do with the TRX. Even in the summer!

If it's just the clutch plates, which it does sound like, there's nothing to worry about. As I said above, just engage the clutch a few times to loosen up the plates; that normally works for me.
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Dead nobodies in company cars...

[Jamie S]

[Spoon261]

I live in the UK

I have the same make, model and version of the bike as the person who has asked about a potential fault.

No one else appears to have the same make, model and version.

The clutch sticking when cold, could well be totally different on other versions and models of bikes.

I have also ridden another identical Honda CG125 bike and its clutch was identical to mine when stone cold and it was 3c outside (middle of winter) and in a warehouse type motorcycle shop.

The clutch sticking and operating it a few times before selecting 1st is a very valid piece of advice, it could be the clutch needs to run in. It could be it’s a slightly faulty clutch but within design parameters.

And remember I have said all along that you only need to do something about it if its excessive. I also said that mine might also be doing it, but its so minor I do not even realise it, if it was bad, I would well and truly no about it and do something about it.

What I latched on to at the very beginning was the stalling part, and suggested a solution.

And what non of you have said is about idle speed, it totally effects the gearbox and clutch. To fast or slow and it can cause trouble.
To fast and the clutch / gearbox / engine will overheat (clutch can spin dry = no oil), to slow and it can stall.

I can well and truly believe that some makes and models / versions of bike have this clutch stick problem when cold as a design glitch. If I was to list the amount of bikes and their gearbox and clutch design faults, I would be typing all day.
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Honda CG125 Website https://hondacg125.awardspace.com/
Honda CBF125, CBR125 & Yamaha YBR125 Website https://125ccbikeclub.awardspace.co.uk/
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[Finglonga]

There is nothing wrong with the clutch, gearbox or bike at all. All wet clutches do it from cold or when they have been standing for a while. As said its the oil between the plates becoming viscous and sticking them together.

BEFORE you start the bike put it into first, pull the clutch in and roll the bike backwards and forwards a couple of times. Now put it back into neutral and start the bike and try it, there shouldn't be a clunk this time.
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Andy Sez....
F.Y.Y.F.F.

[Jamie S]

[Spoon261]

[Spoon261]

[veeeffarr]

So what's this major magical change that completely transforms the Honda CG125 into this amazing machine?

As far as I know it's been practically the same design for 30 odd years, it's hardly a massive design change whatever it is.