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Author Topic: Chain stretch - GS800  (Read 629 times)

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Offline Neo_za

Chain stretch - GS800
« on: May 19, 2019, 07:39:55 pm »
Had my chain perfectly adjusted (about 5 index marks out with another 3 or so to go) and waxed, rear axle torqued to spec when i set out for a nice day in the saddle.

850km's later i stop back at home and the chain is hanging loose.

OEM with 22000km's on.

So either the chain is bad quality BMW stuff, or is too old or there is something else happening - the fact that i carried a bit of extra load in side cases, or because i was twisting the ear a bit, or because i did a lot of km's in one go?

The adventure is very nice to tour on and i was glad for its good lights once night fell - but this chain is crap.

Any ideas and what chain to replace with - this current thing is like spagetti.
 

Offline Sabre

Re: Chain stretch - GS800
« Reply #1 on: May 19, 2019, 09:01:08 pm »
On none of the chain driven bikes that I owned (4 in total), did the ďmaxĒ index marks indicate a worn chain. Chains were shot (and replaced) long before reaching the last index mark.

I normally replace chain and front sprocket together, and rear sprocket with every 2nd chain replacement. Maybe my riding style, buy my rear sprockets tend to last well

22 000km is not too bad a mileage; my KLR chain lasts about 27k on average, with substantially less grunt than a 800

When it comes to the quality of chains, price is a good indication of quality; if itís cheap, give it a miss
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Offline chopperpilot

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Re: Chain stretch - GS800
« Reply #2 on: May 19, 2019, 09:12:02 pm »
You will not get those kms on a 990's chain. :'(

It most probably deteriorated due to nearing the end of its life, with limited lubrication left in the links. :o

Are there any kinks in the chain, that are difficult to "straighten", indicating lack of lubrication. :o

I reckon you should be greatful for the kms achieved, if it is the OEM chain. :thumleft:
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Offline RobC

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Re: Chain stretch - GS800
« Reply #3 on: May 19, 2019, 09:25:57 pm »
22K... not bad for a chain. :thumleft:
 

Offline zacapa

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Re: Chain stretch - GS800
« Reply #4 on: May 19, 2019, 09:51:41 pm »
You get older and you get wiser. Then you realize you have to watch a chain.You makes a plan. Things usually work out from there.Best of Luck! you will be fine.....
 

Offline Neo_za

Re: Chain stretch - GS800
« Reply #5 on: May 19, 2019, 09:57:25 pm »
Yes, probably on its last legs. Quite a bit of stretch in a short period though which surprised me. Hope the bloody thing dont snap.

Will do a sprocket and chain swap as soon as funds allow - it aint gonna be cheap as i favour a OEM front sprocket to minimise any wear on the output splines. Chain and rear sprocket i will source elsewhere.
 

Offline the ruffian

Re: Chain stretch - GS800
« Reply #6 on: May 20, 2019, 07:09:08 am »
When a chain starts to go, it goes very quickly, exponentially...

My DR hardly needed adjustment in 20,000 kays, and has been adjusted 3 times in the 2,000 ks since then. Iím happy to have got 22,000 ks on it...mostly dirt too.

So, it sounds like youíre within spec...
 

Offline blauth

Re: Chain stretch - GS800
« Reply #7 on: May 20, 2019, 08:10:01 am »
Every chain that I've had, starts to behave like this at end of life. It gets noisy and needs regular adjustments. Good condition chains don't need adjustment like you describe. I hate to say but sounds like you're in for some expensive maintenance.

This is very important: make sure you set the tension as per manufacturer spec i.e. up and down play (the marks at the end only really serve to ensure your rear wheel is aligned). A chain that is set too tight when the bike is unladen will most likely tighten significantly when the swingarm depresses and then put the chain, sprockets, primary drive bearing and counter shaft and wheel bearings under undue stress.

22k km on the chain sounds OK. I only got 21k km on my little CRF250 Rally and that doesn't have much power at all.

Offline Skeltonsc

Re: Chain stretch - GS800
« Reply #8 on: May 20, 2019, 08:54:26 am »
Yip probably end of life, however if you jack up the wheel and spin the wheel you will see the chain get tight and loose as it goes around, some chains dont wear evenly so you can set it fine. when you ride you will suddenly see or even feel it jerking.

I have tried JT chains and was not impressed, replace with DID VX

My dl1000 gets 40k on a chain.

my little kle chowed a JT chain in 10k and now that I have a DID on again I've done 10k and to be honest I haven't even adjusted it yet.
 

Offline Neo_za

Re: Chain stretch - GS800
« Reply #9 on: May 20, 2019, 09:13:56 am »
Thanks for the comments :thumleft:

Also think i will go with a proper DID chain
 

Offline BuRP

Re: Chain stretch - GS800
« Reply #10 on: May 20, 2019, 12:23:55 pm »
22K... not bad for a chain. :thumleft:

+1 .... what mileage do you expect actually?
Even when you clean it meticulously, when doing offroad dust will get to it and cause wear, of course!
Git a new set bru!
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Offline Sam

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Re: Chain stretch - GS800
« Reply #11 on: May 20, 2019, 12:48:56 pm »
Don't leave it too long.....

This is a pin out of a chain that I recently replaced - had about 20k km on it, but it was getting a little noisy for my liking. It hadn't really required any adjustment (on the AT you tend to run them really slack)

This will give you an indication of where the extra length on a worn chain comes from. Say 110 links odd, all pins losing about 0.05mm,,,,adds up.

This one was from a masterlink that I knew that I'd stuffed up when I riveted it......just didn't realise how badly it would wear.
 

Offline Blou Zebu

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Re: Chain stretch - GS800
« Reply #12 on: May 20, 2019, 04:04:02 pm »
@Adie Oompie vertel weer daai wat oom Írens verduidelik het dat die dit nie stretch maar....???

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Offline BuRP

Re: Chain stretch - GS800
« Reply #13 on: May 20, 2019, 04:54:38 pm »
Oompie vertel weer daai wat oom Írens verduidelik het dat die dit nie stretch maar....???

Correct, chains don't stretch, but they wear hence all the play makes them longer.
Look at the pic above your post if you need proof?
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Offline Maverick

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Re: Chain stretch - GS800
« Reply #14 on: May 22, 2019, 08:34:16 am »
Iv'e had the same chain on my bike now for several years never stretched. Maybe it's because I lock my rear wheel at the top and then let the chain rest on the tyre and not on the ground when I lock my GS. You okes must look after your stuff better  :peepwall:
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Offline Bill the Bong

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Re: Chain stretch - GS800
« Reply #15 on: May 22, 2019, 11:57:01 am »
One needs to ride the bike to actually wear it. The number of years is not a factor.
 

Offline Cracker

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Re: Chain stretch - GS800
« Reply #16 on: May 22, 2019, 12:13:42 pm »
EK chains have bigger pins than DID .................. are they better?
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Offline Sabre

Re: Chain stretch - GS800
« Reply #17 on: May 22, 2019, 09:34:41 pm »
One needs to ride the bike to actually wear it. The number of years is not a factor.
You did see that he has a 1000 BM ?  ;)
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Offline Maverick

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Re: Chain stretch - GS800
« Reply #18 on: May 23, 2019, 08:58:13 am »
One needs to ride the bike to actually wear it. The number of years is not a factor.
You did see that he has a 1000 BM ?  ;)

Woosh  :biggrin:

I had an Africa Twin for a few years and the had a scott oiler on the chain which created an absolute mess but the chain seemed to last a lot longer. You can't compare the power output of a 2003 Africa Twin with the new bikes these days so it is probably only going to last as hard as you ride.
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Offline zacapa

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Re: Chain stretch - GS800
« Reply #19 on: May 24, 2019, 07:02:53 am »
Easiest way to stretch a chain is to have it adjusted with not enough slack for starters. The swingarm on most bikes generally is angled at a few degrees down from it's pivot point. This results with the chain tightening as the swingarm pivots up to its tightest when the swingarm is horizontal and in line with pivot point and countershaft sprocket. The old XRV750 for example likes to have a pretty loose chain when unloaded.
 
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