my poor little CG

[kingsknight]

Im not very happy, my CG has a rattle in its engine in the high revs

so much for the CG lasting forever! I have changed the oil when i was ment to as well....

oh well a new engine it is for me then! anyone got one going cheap?
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TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)

[TUG]

[mr.z]

If you have kept up with oil changes and not let it run low then its probably valves as lonewolf says, they get pretty loud when they loosen off, because there's not much stopping the noise. Most cgs with a few miles on are quite noisy this way because most haven't had them done for a long time or ever.

Even if it were terminal you can swap even majorish engine bits without much trouble in a day. Theres not many simpler 4stroke engines out there.

Failing that it'll get very loud before it finally went ping. which you might as well do if it was major.
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>RidingSkills<->Tech Tips<->MyBikes<

[kingsknight]

I havent done the valve clearance so I took it to a shop near me to get them done and they said it sounds more like the big end bearings but it really does sound like the noise is coming from the top of the engine if you ask me!

I could even do the valve clearance wouldnt know where to start! Id wish to just pay someone to do it :-p
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TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)

[mr.z]

I'd try elsewhere, and somewhere that don't sell bikes.. theres some right crooks out there.
"oh your bikes broken, never mind we'll take that one off your hands and sell you a new one"
/cynical
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>RidingSkills<->Tech Tips<->MyBikes<

[TUG]

[Cigaro]

Sure it's not a loose camchain?

[19van71]

[Cigaro]

[virus]

its a pushrod engine,

i did a top end job on mine in under 2 hours, without taking the engine out.

check the valve clearances, change the oil, check the plug athigh revs.

if these are all ok, then id ignore it.. its a cg its designed to be abused, and trust me it can take it.

Cheers
John
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own: 81 xs1100g...
owned: 85 rat CG (sold), 91 GS500e (stolen), 84 gsx400f (scrapped), 81 z250 (siezed, siezed, scrapped), 83 cb250rs (sold), 84 gpz750r ratfighter (killed) 84gpz400 (sold), '80 cb650 ratfighter (wrote off) 95gsx6/12f ratfighter (killed) 91 xj900 (sold)
stinkwheel Well I just had my hands up a pigs fanny. Which makes your concerns pale into insignificance.

[kingsknight]

it only happens in the high mid revs, if your in the high or low revs its fine!

i dont really understand the problem. you mainly hear it when your drop down a gear or slow down!
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TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)

[TUG]

[TUG]

[kingsknight]

[TUG]

[virus]

is it stumbling at any revs? engine running through the rev range without holding back/bogging down?

if its at 3/4 then it could be a needle height problem on the carb causing it to bog down and clatter like hell.

if the performance has dropped them id also check your points, you dont need the flywheel off to do this, just the left hand case, then rotate the flywheel so the F mark is going past the mark on the engine, if the points (seen through the hole in the flywheel) are opening and closing then your ok. mine welded themself together and really messed it up, it would clatter like hell at 3/4 and on full it would take an age to get there.


Cheers
John
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own: 81 xs1100g...
owned: 85 rat CG (sold), 91 GS500e (stolen), 84 gsx400f (scrapped), 81 z250 (siezed, siezed, scrapped), 83 cb250rs (sold), 84 gpz750r ratfighter (killed) 84gpz400 (sold), '80 cb650 ratfighter (wrote off) 95gsx6/12f ratfighter (killed) 91 xj900 (sold)
stinkwheel Well I just had my hands up a pigs fanny. Which makes your concerns pale into insignificance.

[kingsknight]

it does have a very slight flat spot in the low revs were it does slow for just a sec, its not a points system its the CDI version!

I havent noticed any drop in speed! it still rides the same just doesnt sound right in the mid high rev range

its not the brake lever too
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TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)

[kingsknight]

finding an engine for my kickstart CDI 2000 model CG is harder then i thought.

the cheapest iv found is like £270 and that had 6k on it. im looking to pay about £150 when it needs replacing
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TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)

[Endless Nameless]

Who says it'll need replacing

If everyone replaced an engine every time they heard a funny noise then no-one would ever get anything done (and no-one would ride old bikes!)
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A2 passed 22/07/08; restriction up 22/07/10 (just so I don't forget)
'79 Suzuki GS550E. Yes, that's a GS550, not a GS500.
Supersports "In a video editing competition I'd kick your sorry ass"

[kingsknight]

[Endless Nameless]

you even checked the valves lol? Even if it is the big end bearings, which I very much doubt, thats cheaper than a new engine and not terribly difficult. But it's probably the top end, and a rattle is unlikely to mean it's on death's door anyway! Seems totally daft to blow £200 + on a "new" engine, which tbh probably wont be much better and is an unknown quantity, throwing away your (probably) perfectly good engine in the process, when you could just sort out what you've already got.

Just my , t'aint my bike after all. But you do seem to be making a mountain out of a molehill!

Anyway, £270 for an engine? £30 more got me an MOT'd bike!
____________________
A2 passed 22/07/08; restriction up 22/07/10 (just so I don't forget)
'79 Suzuki GS550E. Yes, that's a GS550, not a GS500.
Supersports "In a video editing competition I'd kick your sorry ass"

[kingsknight]

your just trying to save me money and for that i thank you, i just have never had a 4 stroke before all my bikes have been the simpler 2 stroke engine!
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TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)

[Noxious89123]

Get some speed and then close the throttle and pull in th clutch.

Does the noise go away? If not, it's likely your drive chain. Caused a rattl on my cbr125 when it got rather slack + unoiled.
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[Kal]

[kingsknight]

it just sounds like the engine is going to fall apart when im in that rev range but as soon as im passed it, it sounds fine
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TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)