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(Honda Hornet 600 UK version) Correct slack is approx 15-20mm, BUT adjusted like that there's a tight spot with 0mm. The green "new chain required" gauge on swinging arm tells me there's plenty of life left in the O ring chain. I've done approx 7K miles and chain wasn't new when I got the bike about 15 months ago. The sprockets are not BADLY worn. I fitted a Scottoiler 7 or 8 hundred miles ago..........Do you folks think I need a new chain and sprockets? This tight spot has only very recently become evident - don't think I've damaged the chain, but maybe I have. Think I'm talking myself into new chain here!..............Anyone got advice about cheap/good value UK suppliers? Could do the job myself I think. Thanks folks. David E.[/b]

If the tight spot is bad enough, you will need to replace. And you MUST do it as a set...chain and sprockets. It is a waste of money to just replace the chain because the worn sprockets will wear it out in no time.
And do not cheap out on the chain. Make sure you get a good quality "O" or "X"- Ring chain.
I know the popular thing to do with sprockets is to get Aluminum to save weight, but I'd get the steel. It may weigh more but it will last twice as long.

Just re-read, if it is adjusted to spec and the tight spot has no freeplay, yeah, time to replace.

Thanks for your reply Corsco, as I thought really - I need a new chain and sprocket set. If Scottoilers make as much difference as claimed then I shouldn't need to replace again for a long time. Might get new rear tyre at the same time - although it's far from illegally worn, I'm getting quite a flat section due to all the motorway riding I do.

all bikes have a tight spot on the chain the best thing to do is get new sprokets and chain when you have put them on turn the wheel untill you get to the tightest part of the chain and then adjust it to the correct chain slack it is about 20 to 30 mm and if you want to get it realy right find the tight spot and you need help with this one sit on it nad get the other person to udjust the chain to the correct slack hope it helped you there are lots of ways to get the correct chain slack do what you think is best good luck

Take your chain off, put it in a small tub of oil, and work all the links back and forth for 10 minutes
it'll make it plenty free, and you probably wont need a new chain.
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