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Adjusting chains

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SoulRider
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PostPosted: 09:36 - 18 Apr 2007    Post subject: Adjusting chains Reply with quote

Just a quick question really, im going to get a 30mil socket bit soon and start tightening my chain up, i obviously cant check the play while sitting on it so when im tightening it (whilst on paddock stand) how much play should there be for a chain to be nice and tight?

Obviously i dont want it to tight by mistake so thought i would check first.

Cheers Thumbs Up
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iand
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PostPosted: 09:58 - 18 Apr 2007    Post subject: Reply with quote

your best off checking the user manual or haynes manual, my FZ6 says 45-55mm, but my Z500 says 25-35mm.

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veeeffarr
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PostPosted: 10:00 - 18 Apr 2007    Post subject: Reply with quote

30mm socket? Shocked

Don't forget 'free play' is loose slack, not how much the rock solid tight chain bends Very Happy
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SoulRider
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PostPosted: 10:49 - 18 Apr 2007    Post subject: Reply with quote

Yup big 30mm socket for my back wheel, and i know its loose slack lol.

Ill check my haynes manual later to see what it says.
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Finglonga
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PostPosted: 10:49 - 18 Apr 2007    Post subject: Reply with quote

Depends from bike to bike on the chain tension.

Always adjust at the chains tightest point, and when you are sitting on it as when its on the paddock stand there is no load on the rear suspension. If it needs moving just lob it back onto the stand.
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SoulRider
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PostPosted: 10:55 - 18 Apr 2007    Post subject: Reply with quote

When i watched them in the garage there was no one sitting on it, he tested the play with the back wheel spinning.

Are you saying i should tighten it a bit, sit on it test the play then tighten more if nessecery?
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MarJay
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PostPosted: 10:58 - 18 Apr 2007    Post subject: Reply with quote

SoulRider wrote:
When i watched them in the garage there was no one sitting on it, he tested the play with the back wheel spinning.

Are you saying i should tighten it a bit, sit on it test the play then tighten more if nessecery?


Or give yourself some leeway.

I'd say adjust it to 3cm free play at the centre of the bottom run of the chain and you'll be OK.
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demoNSR
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PostPosted: 11:13 - 18 Apr 2007    Post subject: Reply with quote

Is it normal to have tight spots on the chain? As i just had new tyres fitted a few days ago, and when the wheel was put back on, the guy was spinning the wheel and there is a couple of tight spots after adjustment, where the wheel becomes stiff while spinning. I had tried to adjust my chain before this myself, and found i got the same problem, and thought i was doing something wrong. So when the mechanic found the same problem, i asked if it was normal, and he said yeh, sometimes. I am a bit dubious, and was wondering if my front sprocket might be warped. The wheel spun straight though, when i put the bike on the paddock stand. I even put it in first gear, stood back and watched, and the wheel seemed to spin straight and true. Any ideas??
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Rookie
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PostPosted: 11:17 - 18 Apr 2007    Post subject: Reply with quote

demoNSR wrote:
Is it normal to have tight spots on the chain? As i just had new tyres fitted a few days ago, and when the wheel was put back on, the guy was spinning the wheel and there is a couple of tight spots after adjustment, where the wheel becomes stiff while spinning. I had tried to adjust my chain before this myself, and found i got the same problem, and thought i was doing something wrong. So when the mechanic found the same problem, i asked if it was normal, and he said yeh, sometimes. I am a bit dubious, and was wondering if my front sprocket might be warped. The wheel spun straight though, when i put the bike on the paddock stand. I even put it in first gear, stood back and watched, and the wheel seemed to spin straight and true. Any ideas??


Tight spots are just a sign of a worn chain, but if there's plenty of adjustment left and not too much sideways movement it's OK. Best bet is to take the chain off and soak it in paraffin for a good few hours to try and work the tight spots out.

Also check how sharp the teeth on the sprockets are, if they're really sharp then you'll want to replace the lot.
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Wafer_Thin_Ham
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PostPosted: 11:18 - 18 Apr 2007    Post subject: Reply with quote

demoNSR wrote:
Is it normal to have tight spots on the chain? As i just had new tyres fitted a few days ago, and when the wheel was put back on, the guy was spinning the wheel and there is a couple of tight spots after adjustment, where the wheel becomes stiff while spinning. I had tried to adjust my chain before this myself, and found i got the same problem, and thought i was doing something wrong. So when the mechanic found the same problem, i asked if it was normal, and he said yeh, sometimes. I am a bit dubious, and was wondering if my front sprocket might be warped. The wheel spun straight though, when i put the bike on the paddock stand. I even put it in first gear, stood back and watched, and the wheel seemed to spin straight and true. Any ideas??


It's just where the the chain has worn unevenly. They are called "tight spots".

Nothing to really worry about, just make sure you measure the slack in the chain at one of the tight spots and you'll be fine.
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Finglonga
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PostPosted: 11:22 - 18 Apr 2007    Post subject: Reply with quote

I would always check the chain after going to garages (even main stealers) as they just adjust it as quick as they can to get it out the way. i have got back before now and heard the chain "cracking" as it was that tight!
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Grubby
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PostPosted: 11:42 - 18 Apr 2007    Post subject: Reply with quote

Big_Ham wrote:


It's just where the the chain has worn unevenly. They are called "tight spots".


It's actually corrosion that causes the tight spots. Just remember to adjust the chain at the tighest point of the chain otherwise it's likely to snap.
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Feasty
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PostPosted: 12:36 - 18 Apr 2007    Post subject: Reply with quote

And just to quickly ask the question I'm sure is on the tips of everyone's tongues whilst reading this thread! Wink

What's the best and quickest way of checking where the tightspots are on a chain?
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Finglonga
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PostPosted: 12:47 - 18 Apr 2007    Post subject: Reply with quote

beanfeast wrote:


What's the best and quickest way of checking where the tightspots are on a chain?


Rear wheel off the ground, spin the wheel slowly checking how tight the bottom run of chain is. When you get to the least amount it will move up and down thats its tightest spot.
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demoNSR
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PostPosted: 13:13 - 18 Apr 2007    Post subject: Reply with quote

Thanks guys, I was a bit worried that i had a warped sprocket or something. I do keep the chain lubed regularly, but i will check the teeth on the sprocket etc, and try adjusting the chain like Finlonga described. Cheers fellas, very useful tips. Smile
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cagiva gezzer
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PostPosted: 17:19 - 18 Apr 2007    Post subject: Reply with quote

Use a tapemeasure / rule down each side of the swing arm to get the rear end square.
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demoNSR
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PostPosted: 17:42 - 18 Apr 2007    Post subject: Reply with quote

Yeh i have tried that, cheers. So i think my chain is probably stretched in 1 or 2 places. It is kept well lubed though, so i don't think it is corrosion, as it has never been let to go dry while i have had it. And it was perfect when i bought the bike in october, no tight spots. Thinking of getting a new chain and sprocket set for it for de-restriction anyway. Just hope it doesn't snap in the meantime. Confused
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