Honda CG starts fine but cuts out after a while

wiseguy01 · L Plate Warrior Joined: 23 Feb 2015 Karma :

My 2001 CG starts fine and runs fine for about 5-10 minutes. Then it starts to shudder and jump. It gets worse and worse until the engine just cuts out. If you leave it for a while it will start up again but performance will still be bad. If I start it the next day it will be ok for 5-10 minutes again.

I´ve cleaned the carb but it hasn´t helped.

Please help, I can´t stand commuting on the tube anymore!

mudcow007 · World Chat Champion Joined: 01 Feb 2012 Karma :

are you sure you have cleaned the carb enough?

try running it with fuel cap off, it mightn't be getting any air to it.....

DrSnoosnoo · World Chat Champion Joined: 28 Mar 2012 Karma :

You 're turning the choke off aren't you? My CG will run for about 3 minutes on the choke before getting upset.
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flikers · Nitrous Nuisance Joined: 16 Feb 2015 Karma :

Choke up = on.
Own = of.

Had a friend who got these mixed up and thought his bike was buggered.

wiseguy01 · L Plate Warrior Joined: 23 Feb 2015 Karma :

I´ve actually cleaned it twice, it wasn´t that dirty to start with. The Choke is down (off), it gets a lot worse with it on.

Stalk · Brolly Dolly Joined: 26 Dec 2005 Karma :

Valve clearances tight? Tight enough to hold valves open once hot and metal things expand? Something electrical breaking down when hot? I'd start with the valves as its a no cost job
Hope that may be of some help
Cheers!

316lad · Borekit Bruiser Joined: 12 Nov 2014 Karma :

bypass2 · Spanner Monkey Joined: 12 Sep 2013 Karma :

Faulty/ dirty petrol tap maybe.

Ariel Badger · Super Spammer Joined: 02 Dec 2006 Karma :

First thing is a new spark plug, plugs are cheap.
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Rogerborg · nimbA Joined: 26 Oct 2010 Karma :

Have you at least looked at the plug colour? It could just be idling rich and sooting up.

Also when you say you've cleaned the carb, what exactly do you mean?

Have you fitted a filter into the fuel line? I do it as a matter of course now.
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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

wiseguy01 · L Plate Warrior Joined: 23 Feb 2015 Karma :

Hi Guys

-Changed the spark plug when this all started, it looks normal (no massive soot deposits or anything like that)
-When I cleaned the carb I took it apart completely and cleaned it with carb cleaner. I check the jets carefully they looked good.
- Checked the fuel flow today and took the cap off after driving it for a bit. Doesnt seem to be any flow issues and the fuel looks clear.
-Choke is fine, when I was cleaning the carb I kept forgetting which way was on and off so I´ve had plenty of opportunities to spot any problems with it.
-A mechanic checked the valve clearances not too long ago, he said the looked fine.

One other symptom I forgot to mention was that it occasionally backfires, normally when I am trying to start the engine mid-drive after it has cut out. Any ideas?

Rogerborg · nimbA Joined: 26 Oct 2010 Karma :

RidingBear · Derestricted Danger Joined: 24 Feb 2015 Karma :