chain issues

dan_bhatoa · L Plate Warrior Joined: 07 Oct 2008 Karma :

Hi,

I've recently replaced the back wheel my motorbike, as the wheel bearings were loose (now replaced). I've noticed the slack on my back wheel varies as I turn the wheel, at it's tighest it's around 0.5cm (I head a ruler perpendicular to the chain and pushed straight up). At it's slackest point the chain is 2.5cm.

Is this variation in slack normal? Whilst the bike runs ok, I noticed some sounds it makes are a little different, whenever I change gear I can hear a loud chook chook sound as the gears shift and click - again is this normal?

thx

Dan

Graprilia · Brolly Dolly Joined: 02 May 2007 Karma :

i think you have the same problem as me LOL , hopefully someone knows how to sort it.
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Piaggo liberty 125 SOLD - CBR 125 - SOLD Aprilia RS 125 - SOLD CBR 400 NC29 - SOLD ZX6R currently own https://bikepics.com/members/Graprilia/

rotax81 · Nearly there... Joined: 10 Sep 2008 Karma :

sounds like new chain and sprocket time. replace them all together as any old bit will fooker a new bit Thumbs Up

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ZX636C6F road. ZX636C1H track. ZX7R redundant. ZX0.5R minimoto as ornament.
Audi A4 Avant 1.9TDi and VW Transporter 2.5TDi 888 Special (no mot and tax lol)

Finglonga · World Chat Champion Joined: 27 Jul 2004 Karma :

All chains have tight spots, the tension of the chain should always be done on the tightest part of the chain. If you use a slack part of the chain then when the tight part comes around (especially with weight on the bike) you stand a chance of bending the output shaft or knackering the output bearing.

As said, if they are too far gone buy new ones.
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Andy Sez....
F.Y.Y.F.F.

steve32 · Trackday Trickster Joined: 17 May 2008 Karma :

when i first got the bike ive got now i had to change both sprockets and the chain because it was doing the same thing and it failed the mot because of it i would say the best 120quid i spent in a while, better to be safe than sorry
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suzuki GSX 600F katana .: ~my bike up for sale~ :.
CBT = Completed
DAS= Working on it - theory test = Passed

dan_bhatoa · L Plate Warrior Joined: 07 Oct 2008 Karma :

I took it down to Hein Gericke in Welling, got a couple of the lads there to have a look, they said chain looks fine, sprocket has around another 5k of wear left. I bought some chain lube (as opposed to wd40) and gave the chain a clean, then lube (applied to the chain links, not the outside) and topped the engine oil up to the full mark (was at halfway before)

Sounds a lot better now, but will keep an eye on it.