Too much chain slack?

[awicks]

My Glee has done about 19,500 miles - I bought it a year ago with 10,500 on the clock. It has had a ScottOiler fitted since new. It is my first chain-drive bike, so this is all new to me.

Today I noticed a lot of play in the chain (I admit to being poor about checking it very often). This evening I have adjusted it and discovered there is quite a bit of difference in slack between the tight spot and the loosest spot on the chain. I have adjusted it so that there is about 30mm slack at the tightest spot, but am concerned that this makes it too slack at the loosest spot.

Am I right to be concerned about this? Does this mean that I need to replace the chain and sprockets? As far as I am aware it is still on the original chain and sprockets.

Thanks in advance, Andy

[Joe Rocket]

If the Scotoiler has done it's job then there should be plenty of life left in it. 19.5k seems good so far.

You've adjusted the chain correctly (at the tight spot) and I wouldn't be worried by extra play where the chain is free-er.

How far down the adjustment graduations is the chain currently set, are you at the end of adjustment?

Is there a lot of slack in one link at the rear sprocket if you try pull the chain off it away from the sprocket?

If there's plenty of adjustment left and the links are still tight on the rear sprocket I wouldn't be worried unless you can feel through the footpegs or hear a sort of throbbing, tightness of chain or chain riding up the sprocket(s).

HTH