CBR125R 2005 Problem Cold Start

danbeer1991 · L Plate Warrior Joined: 10 Feb 2015 Karma :

Just under 9000 miles 2005 carb model

Each morning i go to start up my bike atm it is rather cold outside and has been struggling but i have noticed one or two days if i have had a lye in and havent tried starting my bike till miday or later and it has warmed up a bit around the bike is still the same and struggles but once started will be fine for the rest of the day bearing in mind i ride to work in the morning and it is left until i go home or sometimes on my breaks.

From the start when i got this bike it used to start with no problem with the choke and to keep it going a little revs then after about 2-3 seconds it would splutter like it wanted to die and it was really cold and didnt like it, i would turn the choke down with the revs on a little bit and then the choke back up and it would get past the cold spluttering and let me warm my bike up and then work fine from there and for the rest of the day would have no problem starting or warming up only when left over night or a very long period. i found a nak to do it as to my knowledge it shouldnt have been like that but if i didnt keep it alight and it did cut out it would be hard to start again with choke on or off, its like it was struggling to stay alight it was getting worse so i changed the spark plug got a new air filter got a new fuel filter also got the valves tightened timing checked cleaned my jets cleaned my carb checked my fuel lines it seemed a bit better but still couldnt just leave it to warm up

but now i start the bike with choke on it starts fine when cold i give a little rev to keep it going it wont splutter it will just cut out after 2-3 seconds even with me trying to keep it alight with choke on or off and with revs and when it cuts out it is really hard to start and wont let me bump start it
is it possible that something little could have worn away on something that could be causing this problem? When i first got the bike i could get it past it and that was when it was really cold, it is cold now but no where near as cold and it has got worse
Once i have got it past that and it cuts out and i get it alight with a struggle and struggle to keep it alight it will let me warm it up like normal and be fine all day even left for a good few hours to get cold again either way i have never just been able to leave it to warm up i have got to get it past that first bit but now a days that isnt a option it just cuts out, i used to be able to get it past that messing around with the choke on / off
I understand a bike will cut out sometimes if it is cold but not constantly everytime even when you are trying to keep it alight at first i was blaming it on the cold weather but it is rediculous it is constant all the time and its the same ruitine everytime hoping it does start to get to work but it starts perfect the first time just dies, can anyone help me i hope you can understand im not too good at putting words into writting
thanks dan Thumbs Up

P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

Full choke, keep it there while you put your lid on and ride away gently.

danbeer1991 · L Plate Warrior Joined: 10 Feb 2015 Karma :

P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

Carb clean?

danbeer1991 · L Plate Warrior Joined: 10 Feb 2015 Karma :

P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

Are you a spacker... Confused

I'm actively helping you and you are rating my posts, incorrectly Laughing

I've owned tons of these. None ever had this issue.

Cold, 1/8th throttle, full choke and starter.

el_oso · World Chat Champion Joined: 17 May 2008 Karma :

After cleaning the carb on my one I haven't had any issues at all getting it started. I'd be checking that there is fuel in the bowl. Then I'd be checking the spark. Then I'd be re-cleaning the carb paying close attention to the jets in case of blockages.
____________________
Duke 390
Previous: '05 XR125L | '96 XJ600S Diversion |'05 Suzuki GSXR1000 | '05 Honda CBR125-R | '97 YZF 600R Thundercat | '11 Honda CBR250
Car: Jeep Wrangler 4.0L

finchy95 · Scooby Slapper Joined: 26 Jan 2015 Karma :

Are you 100,000% sure you reassembled the carb properly? I understand there's a few small fiddly parts (jets and such)
____________________
2005 suzuki van van - Sold. -> 2015 honda cbr 125 r - current bike.
Now's not the time for fear. That comes later.

danbeer1991 · L Plate Warrior Joined: 10 Feb 2015 Karma :

okay i will keep a close eye on it all, Thank you!!

You are not helping me!! I have clearly stated above i do that and it still dies every morning without fail!
you are stating the obvious thinking you know about everything, me a spacket? you clearly havent read what i wrote above like it is going to be a walk in the park simple answer when it clearly isnt!
Have said above what i have changed/cleaned and tried.
Dont be such a rude chap and that wouldnt have happened no point commenting if you havent got a helpfull answer and if you had have tones of these and never had this issue then surely you wouldn't know how to sort it Confused

dont comment the obvious that i have already said i have done

Simba76 · Renault 5 Driver Joined: 18 Dec 2014 Karma :

Wow.

Good luck getting decent reply now.

I know you're frustrated, but theses guys and gals are just trying to hel pand without having the bike in front of them they are pointing you in a particular direction.
If you want to get it fixed, take it to a garage and pay your money.

But I guess from your post you would rather try and sort it yourself, and rightly so.
If that is the case, let people give their help.

If you dont like it......The doors over there.
____________________
If you can keep your head while all around are loosing theirs....you're probably in some sort of Zombie movie!

-Current bike ......

danbeer1991 · L Plate Warrior Joined: 10 Feb 2015 Karma :

i appreciate everyones help but i just felt as if i was repeating myself.
i wrote what i did above to try and avoid the obvious solutions which i have already tried.

i have asked the shop but its a matter of give it a go and see if it sorts it and didnt really want to waste £100's when it could be something very simple. i was just wondering if anyone has experienced simular problems. Thanks

el_oso · World Chat Champion Joined: 17 May 2008 Karma :

thing is, there really isn't that many parts to a small single cylinder engine.

My guess is still a blocked pilot jet and you just haven't cleaned it well enough. Let us know how you get on. We might pretend to care.
____________________
Duke 390
Previous: '05 XR125L | '96 XJ600S Diversion |'05 Suzuki GSXR1000 | '05 Honda CBR125-R | '97 YZF 600R Thundercat | '11 Honda CBR250
Car: Jeep Wrangler 4.0L

danbeer1991 · L Plate Warrior Joined: 10 Feb 2015 Karma :

P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

OK, so I've had LOADS of these and could probably rebuild one from a box.

If it doesn't run with the way I've said, you need to recheck the carb, check the air filter and the airbox>carb pipe.

While you are there check or replace the vacuum pipe to the tank.

I don't care if you've already done it, do it again as evidently it didn't work.

Rogerborg · nimbA Joined: 26 Oct 2010 Karma :

It sounds like you're demanding a solution that doesn't exist.

A blocked pilot jet seems to be a common issue on these bikes and it's what I'd be checking, along with the inlet rubber and any vacuum gubbins.

Yes, it's been cleaned - maybe - but if it got blocked once, then it's likely to get blocked again.

Did you clean the jets yourself? Did you do it thoroughly? Or did you take someone else's word that they'd been done?

How's your tank? If you drain the carb, is there any crud at all in the fuel? It doesn't take much to block a pilot jet.
____________________
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GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike