Honda CG starts fine but cuts out after a while

[wiseguy01]

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]

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]

You 're turning the choke off aren't you? My CG will run for about 3 minutes on the choke before getting upset.
____________________
I'm Sam; Northern, Ginger, Lover
Did have: '95 ZZR600 '83 CG125 '97 ZZR1100 '15 Hypermotard 821 SP Do Have: '10 ZX10R

[flikers]

Choke up = on.
Own = of.

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

[wiseguy01]

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]

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]

[bypass2]

Faulty/ dirty petrol tap maybe.

[Ariel Badger]

First thing is a new spark plug, plugs are cheap.
____________________
Bikers make great organ donors, get 115 on your licence today.

[Rogerborg]

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.
____________________
Biking is 1/20th as dangerous as horse riding.
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]

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]

[RidingBear]