CG carb problem?

Mister James · I want to believe! Joined: 10 Aug 2004 Karma :

One of the auxiliary officers at work has bought himself a CG, mostly due to my constant sneering at the amount of time he spends in traffic traveling to work from the same area as me.

He says that it will tick over if the choke is fully out, but splutters and dies when running on a normal mixture. He says he bought it off a guy who's left it in a shed for years with a half tank of petrol - from that I'm guessing that it's probably a case of shit in the tank getting into the carbs? If so, is it going to be relatively easy for him to sort himself, or should he get it into a garage?
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veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

Remind him that choke swich up = full choke
choke switch down = no choke

The bike will not run very well on full choke.

If he knows this, then *shrug*

Paddy Blake · World Chat Champion Joined: 29 Jun 2006 Karma :

I would drain the tank and clean the bowl at the on off tap then clean the carb.

KatOwner · Nova Slayer Joined: 30 Jul 2006 Karma :

After a couple of years, the petrol is probably not up to much either!

Drain it off, clean out the carb/tank and then refill with fresh petrol. Should be better after that...or, if there is a problem, much easier to diagnose.

To be honest...it sounds as if there isn't enough fuel getting through, and after a lengthy lay-up, it's going to be down to muck in the fuel system. Easy to fix!

irving · Traffic Copper Joined: 02 Oct 2006 Karma :

Mister James · I want to believe! Joined: 10 Aug 2004 Karma :

Ok, sounds like it's probably what I thought it might be.

He's quite keen to do the job himself, is it fairly simple, from the point of view of taking bits apart etc?

I suppose it's too much to ask that someone has a link to a guide? One with pictures?
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>Soultrader Mister James, I bet you are a copper
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Cillit-BANG · World Chat Champion Joined: 05 Oct 2005 Karma :

If he has no experience of carbs then it may be an idea to certainly get hold on a Haynes manual. For example, the carbs may need to be keep upright at all times to ensure the fuel doesn't ruin certain components.

They can be fickle things, and if something isn't 'quite' right it will run poor.

irving · Traffic Copper Joined: 02 Oct 2006 Karma :

Cillit-BANG · World Chat Champion Joined: 05 Oct 2005 Karma :

From Haynes-

Keep the carburettors upright to prevent fuel spillage from the float chambers and the possibilty of the piston diaphrams being damaged.

Thumbs Up

irving · Traffic Copper Joined: 02 Oct 2006 Karma :

KatOwner · Nova Slayer Joined: 30 Jul 2006 Karma :

CG will be a straightforward slide type carb. No accelerator pump diaphragms, nothing much to cause problems!

Just make sure you work in a clean environment, empty out the fuel carefully, and don't drop anything!

Don't clean it with anything likely to leave fibres, fluff etc behind ( the old lint free cloth! ) and don't clean out jets by poking anything down them.... it's a nice simple job that won't need any special tools.

Cillit-BANG · World Chat Champion Joined: 05 Oct 2005 Karma :

I was more trying to get my point across that when it comes to carbs it's not always black and white. Smile

irving · Traffic Copper Joined: 02 Oct 2006 Karma :

davidimurray · Nitrous Nuisance Joined: 04 Jul 2006 Karma :

Hi

A couple of months ago my girlfriend got an SR125. Went to look at it, it was only a couple of years old and with 5K on the clock it should be fine. However, it had not been used for a year. As a result it wouldn't run unlees the choke was out and it struggled to idle.

Bought it and got it home - drained the fuel and cleaned the tank, cleaned the carb jets , new plug and oil change and it now runs like a dream. When we drained the fuel out, it didn't actually smell of petrol anymore!

Cheers

Dave

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Another vote for cleaning it all out. Water in the carb would have a similar effect (and the same fix although you might get away with just draining the carb).

All the best

Keith
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map · Mr Calendar Joined: 14 Jun 2004 Karma :

Yet another vote for cleaning out the petrol and carbsFrom what I recall the CG can be funny running on the choke. When last started (about 6 months ago) my old one would run only on the half choke setting Rolling Eyes

Also think about adding some additive to help clean out the carbs.
Silkolene FST will do this, should be available from local 'bike shop.
From the Silkolene site