Warming up

[banksy]

okok so another question about my brand new honda cg

in the morning it wont start unless the choke is fully out (fair enough)
however unless im constantly holding the throttle open the engine will stall.. unless its warmed up. This can take about 5 minutes even with the choke out.
i feel like a right twat sitting there for 5 mins revving up... i dont mind it warming but having to hold it is awkward

is this normal?
ive heard you can increase the idiling speed but will this solve the problem?... and is it a good idea to attempt this myself?

ty
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banksy
-CG125 07- -GS500F 04- -CBR600 98- -FJ1200 86- -XT350 91- -CBR900RR 01-

[st3v3]

just find a big screw on your carb, and turn it until your happy it's not too lean/rich, and idles ok. it shouldn't, but four strokes essentially need to warm up a bit before use
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Roger wrote: Women don't get damp for clingy puppies. Get some better happy pills, hit the gym & buy a medallion the size of a dinner plate. Job done

[stinkwheel]

You need the oil in the engine to warm up. The slowest way to do this is to leave the bike idling.

To warm up the oil, you need to compress it through the oil pump. Best way of doing this is to put the engine under load.

What I do is start the bike and as soon as it's settled, get on and ride away. About 100yds down the road, I switch the choke off. I take it easy for the first couple of miles until the engine is up to temperature. The engine in my KLE500 has done over 70k miles and I have never left it sat idling to warm up.

This may be a contraversial oppinion but as far as I'm concerned, the fastest way to get the oil up to working temperature is to ride the bike.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[teampots]

[bushido]

Hi there

I also have a honda CG and have a similar problems (not that I call this a problem), My bike tends not to start first time from cold and generally takes a few attempts. ASfter she has started there are no problems and she runs great.
Someone with more experience about bikes than myself (which isnt hard as Im a complete newby) told me that the CG struggles to start first time because of the petrol shut off switch having been in the off position for a period of time

How accurate this is Im not to sure, But it may give you an insight into the issue.

Happy riding
Stuart

[banksy]

thats just it though... she doesnt settle until about 5 mins of revving
ive tried increasing the idle speed n im just waiting for her to cool down
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banksy
-CG125 07- -GS500F 04- -CBR600 98- -FJ1200 86- -XT350 91- -CBR900RR 01-

[thefallenange...]

CG's are like this. Mine took a while to start from cold but i'd ride it pretty slowly to warm up. It's not it's going to go bang like a 2 stroke anyway.
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Past - CG125 ,KR1S, SV650s, Street Triple R - Current - Duke 390

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[kwellsqpr1]

on my mums cg its the same what i do is start it on choke. rev 4 a few seconds then put it to half hoke while im still revving then while im still revving take choke off. then keep reving and ride straght away but just keep it easy.
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keeping it rubber side down

[ace_tweety]

I do that with my yamaha sr.
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Suzuki SV 650 (blue of course!)

[banksy]

yea but when i ride away (with choke on.. havent tried without)
even after about 3 mins... it acts like its in 3rd gear and barely moves and judders about

... as soon as i throttle off coming up to a junction it stalls even though the bikes still moving
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banksy
-CG125 07- -GS500F 04- -CBR600 98- -FJ1200 86- -XT350 91- -CBR900RR 01-

[Jull]

I had a Honda XR125 which I believe is the same engine.

What I did was full choke to start, then once it's caught turn to half choke, put helmet, gloves etc on then turn choke off and ride away.

Always worked and never missed a beat!

[colin1]

[stinkwheel]

[keyser soze]

[colin1]

[mattgirv]

Actually I believe the point of warming an engine up is so the metal can expand. Basically as the engine gets hotter, it expands and the oil flows through. Going nuts on the engine while it is cold has more chance of friction between said metal parts hence why you should warm it up.

Also hot oil and cold oil work pretty darn similar, especially under pressure. The only difference is really to do with the rate at which it flows.

By the way, it is a lot quicker to warm your engine just by riding it if possible. An engine under load will always warm up quicker than an engine simply idling.

Infact I will add to this that excessive idling is actually bad for your engine, and for the green folk, the environment.

[stinkwheel]

[khoock]

[c-m]

If my bike isn't warmed up you cannot ride it, simple as that it just stalls every time.

I generally use the choke to start it then open the throttle a little to increase the revs then let it idle for a minute. By the time I've got my lid/gloves on I can just about pull away slowly.
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[notoriousb.e.n]

ive got a brand new CG as well its the same here. i find if you give it full choke let it start, rev for about 30-45 secs, then knock it off and do the same on half, you should be good to go. also within a minute of riding it should be warmed up anyway, it shouldnt take much to get a new bike going properly anyway. and it shouldnt take many revs either to warm up, just a gentle nudge on the throttle just to coax her awake.
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Ride the tiger! you can see his stripes but you know he's clean!
Gilera Dna 125, Honda CG125 offs: 2 pulled: 1.

[colin1]

i googled "warm engine to"
and found loads of things suggesting its good to warm an engine before using

on everything from boats to helicopters

https://www.google.co.uk/search?q=%22warm+engine+to%22&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official

but nothing that actually says why
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colin1 is officially faster than god

[Kickstart]

Hi

The oil does need warming up, but I do the same as Stinkwheel.

It doesn't take long for oil to circulate in normal conditions (although well below zero it might take quite a while). Litterally a second or 2 (unless the filter is empty and the engine previously drained). However it takes a hell of a long time to get the oil fully up to temperature (probably 10 miles or so of normal use), far longer than it takes the engine to show full temperature.

Main reason to warm things up is so that the clearances are about right. Different metals expand at different rates, so are only going to have the appropriate clearances relative to each other within a certain temperature range.

Another issue with warming a bike up on choke at idle is that you are sticking a very rich mixture into the engine, and the petrol will do a good job of washing the oil from the cylinder bore, increasing wear.

In some ways 2 strokes are more resiliant than 4 strokes at being thrashed when cold. No valve gear or cams to get rapidly worn out, nor plane bearings that need high oil pressure. Rings getting caught in ports and cold seizures are problems that have only really been a major issue in the last 10~15 years.

All the best

Keith
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[stinkwheel]

[Cigaro]

[Stiffler]

I think with pretty much any 4 stroke other than the little 125's your good to go straight away, as long as you take it easy and don't rev the nuts off it. But with the 4 125's I've ridden (in my short biking career) they all bogged down terribly, stalled, struggled if you set off imediately and were pretty much good to go with the choke off if you allowed them to idle warm up for 2 mins. Which I used to find easy enough to kill while I'm getting my buff, helmet, gloves on...

Now with a 400cc bike I start it up, let it warm up for about 20 seconds while I put my gloves on and it's good to go.

Tim
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Current Bikes - Kawasaki ZX-6R (636) | BMW G650GS