CG125 broke on me :(

dextersaurus · World Chat Champion Joined: 25 Mar 2009 Karma :

Hey guys.

Had a wee problem with the CG today, decided to cut out on me half way home.

Started up fine after a few kicks and rode fine all the way home, except it was jumping about in 5th gear.

So i got the thing home and took the chain cover off. And the chain was tight, and the sprockets were fine as far as i could see.

Turned the wheel round a few times and all was good.

Then had a look at the engine....

Shocked

Oil everywhere.

Help! Sad

https://i624.photobucket.com/albums/tt325/duncdmc/DSC00008.jpg?t=1245167164
https://i624.photobucket.com/albums/tt325/duncdmc/DSC00009.jpg?t=1245167091
https://i624.photobucket.com/albums/tt325/duncdmc/DSC00010.jpg?t=1245167027

under the cluch cable.

https://i624.photobucket.com/albums/tt325/duncdmc/DSC00011.jpg?t=1245166956

My guess is the gasket is gone.... And not really surprised seeing as the guy before me hadn't been near it with a touch of oil never mind a spanner.

Then decided to check the Oil level as it was HOT.

https://i624.photobucket.com/albums/tt325/duncdmc/DSC00012.jpg?t=1245166913

Only topped up the oil yesterday, was just under the max indicator.

Done about 100 odd miles today i think.... been out for quite a while, but no way should it have drank all the oil.

And this is under the gear lever, pretty mucky with oil.

https://i624.photobucket.com/albums/tt325/duncdmc/CopyofDSC00014.jpg?t=1245166800

So... Causes and fixes?

Been thinking about a new engine... one with electric start so i can add a couple hundred onto the resale value once i get the time to clean it all up. So if it's new engine time, its not too much of a kick in the balls Laughing

Cheers

Dunc

Mark65 · World Chat Champion Joined: 16 May 2008 Karma :

Hi
Just looks like the head gasket has gone, i think its just a rubber ring on top.
The last picture if that is the gear selector doesnt look bad as the front sproket throws oil or whatever lube you put on off around that area and it runs down to there and then onto the stand, its why i remove my front sproket cover each month and clean around mine.
The oil around the base of the cylinder could just be the leaking head gasket, replace the rubber ring clean it all of including the area down below and top up oil see how you go from there.
Hope it helps. Remember theres only about a litre of oil in there.

Mark
____________________
07 Yamaha YBR125, 07 Honda CG125 , 15 CBR300R (Chocolate Crank, Deaded), 16 CB500FA, 19 Honda Forza 300, 70 Suzuki SV650

baldy · World Chat Champion Joined: 15 Feb 2004 Karma :

It looks like the base gasket and the valve cover gasket is leaking. The head gasket looks fine but i would replace it anyway if you are going to do the base gasket.

What do you mean by the chain been tight? Have you set the chain free play? If it is too tight it can cause the surging you are talking about and strange gear change problems.

dextersaurus · World Chat Champion Joined: 25 Mar 2009 Karma :

Ant132 · World Chat Champion Joined: 18 Nov 2007 Karma :

By the look of it the rocker cover seems to be the worst part of it. Check its not leaking down the and resting on the crankcase before you decide its the base gasket too.

The base gasket is an easy fix and if it drinking oil then there is your oppurtunity for a bit of a top-end overhaul. There still seems to be oil on the dipstick so just make sure you are testing it fairly by wiping off all the excess oil and then resting disptick in and not screwing it in (might be the opposit though and thats why you are not getting a reading, im not sure of how it is on the CG)

Gear level seal is probably worn aswell, again an easy fix. Thumbs Up

____________________
1980 Suzuki TS50 ~ 1984 Honda CB400N ~ 1992 Triumph Trident ~ 1998 Suzuki Bandit 1200

Nipedley · Scooby Slapper Joined: 09 Aug 2008 Karma :

I have a CG too, when I saw the oil around the gear lever and underneath I too thought I had an oil leak but when you take off the front sprocket cover it's fairly obvious its all just getting flung off from there, I wouldn't worry about that too much Thumbs Up

As the other have said it looks like you have a gasket leak up top and it's leaked down around your clutch, I'm not sure how likely it is for two gaskets to have failed at once? Maybe they have but either way I don't think it's a replacement engine job just yet Very Happy

dextersaurus · World Chat Champion Joined: 25 Mar 2009 Karma :

Nipedley · Scooby Slapper Joined: 09 Aug 2008 Karma :

That does sound pretty neglected, poor CG Sad

As for the electric start, I don't blame you Very Happy

Mine is an electric start, I much prefer to just press the starter button than mess around with a kickstart!

dextersaurus · World Chat Champion Joined: 25 Mar 2009 Karma :

Nipedley · Scooby Slapper Joined: 09 Aug 2008 Karma :

Mine's the newer style on an 05 plate, I was lucky though as it had been in storage for years and I got it fairly cheap Smile

So I've been able to look after it, I do think the CG are a great bike for what they're made for. Glad to see you're going to do yours up Very Happy

It must be a nice feeling to ride knowing that some of your own blood sweat and tears is helping that engine chug along! Go for it Mr. Green

dextersaurus · World Chat Champion Joined: 25 Mar 2009 Karma :

Creepin Moses · Nova Slayer Joined: 17 May 2009 Karma :

You can get full gasket sets for the cg's very cheaply now that should cover all the seals you need, yeh too much tension on the chain can cause probs with the drive, it puts extra strain on the drive shaft etc, I agree leave a little bit of free play in the chain.
Smile

____________________
Bomb disposal expert, if you see me runnin, try to keep up.