Chain strech

[Mini Stalk]

Hi guys, my chain keeps stretching like mad. it is well lubicated and my allighment and bushes are fine. why is this happerning?

Thanks Dave

[nowhere.elysium]

Is it a cheap chain? Are you setting it too tight initially?
It'd also be handy to know what the bike in question is, too.
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'10 SV650SF, '83 GS650GT (it lives!), Questionable DIY dash project, 3D Printer project, Lasercutter project

[.....]

It's probably at the end of its life and needs replacing as soon as possible.

[Paxovasa]

It could be a combination of you been overly aggresive with your right wrist and a cheap chain/sprocket set.
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Suzuki GSF600 K3 (in the fastest colour, black).

[0l0dom0l0]

+1 to all the above.

How many miles has it done?

What make is it?

[Mini Stalk]

its a did chain and sprockeys had it on for about 1000 miles. and its only a little 125

[.....]

Are you sure that you're setting the tension correctly as per the book and not setting it too tight?

[cb1rocket]

there must be some up and down slack usally about 25-50mm overall on freeplay from centre of chain

Some people really do, do them up dead tight that you can't turn the wheel!

[Pete.]

Sounds like a cheap chain. The worst I've seen are called 'Heavy Duty'. Fit a grade 5 chain and keep it lubed and it will last a long long time.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[stinkwheel]

[Pete.]

Yeah the brand. Nothing could be further from the truth.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[CaNsA]

What bike is it dude?

I had trouble with the CLR125 a few years ago.
I would adjust the chain so that it was spot on, not to tight not to slack.
Sit on the bike and the chain would be waaaaay to tight.

Get the back wheel off the ground, spin the wheel slowly and watch the bottom chain from the side of the bike.

See if the chain moves up and down, this will indicate a buggered chain.

If you need to keep using then spin the wheel so that the chain is at its highest point, as this is when it is at its tightest, then set the required amount of slack.

Dont forget about move the chain will tighten up when you sit on the bike.

Does that make sense?

hth
CaNsA

[Devans]

Check that the wheel isn't slipping forward, had the issue on my 125cc. Makes you think your chain is constantly stretching but really the wheel is slipping forward

[chris-red]

I had this on my GS, luckily it blew up I never did get to the bottom of the issue I reckon it was a cheap chain though.
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WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.

[cb1rocket]

some bikes are specific to whether its suppose to be adjusted on the ground or with the rear wheel in the air

[andys675]

have a look at the side plates, should be stamped with a H at the end of the number if heavy duty 420H or 428H etc, if you're bike should have a H grade chain on as standard and doesn't have one even a decent make like DID will wear out quickly if its only a standard chain fitted