Gonna get a new set of hoops next week or so, will put a quality x ring chain on too. Sprockets look fine, in that they aren't hooked, but then I don't know if they wear in other ways or if I should replace them anyway sort of like you would an inner tube on a tubed tyre just because, why not.

Or do I have nothing to gain by replacing both sprockets if they look fine?

If you've been through more than one chain, it may be time for new sprockets.  It doesn't need visible wear to be worn.  By the time the teeth become hooked, it's way over due.

You're spending money on new wheels and chain, why not complete the job?  How much additional do they cost? 

Quote from: Kilted1 on November 07, 2018, 11:05:15 PM
If you've been through more than one chain, it may be time for new sprockets.  It doesn't need visible wear to be worn.  By the time the teeth become hooked, it's way over due.

You're spending money on new wheels and chain, why not complete the job?  How much additional do they cost?

About $70 AUD, it's my first chain. But yeah I guess you're right, not worth taking a chance over,  it's the original chain, it's done 57k kms.

Personally I'd run those sprockets again. They don't look too bad although I religiously clean and lube my chain every 1100kms or less (I aim for 1,000kms but sometimes it just doesn't pan out that way) so when they are clean they might look a bit different.

I'd recommend against the X ring chain. I'm running one at the moment and I don't think it is lasting any better than a O ring chain that I had on it previously. I do notice the x rings seem to damage easier than o rings. GS5 don't need a super dooper chain because of the power!

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The sprockets *should* be changed every chain swap.  In my case my last chain swap was with only 10k miles on the bike so the stock sprockets were ok, but 57k Kilometers is a high enough interval that I would do the full change.

The sprockets really aren't that expensive in the long run.  It's worth it to make sure you get max life out of the new chain.

The industry is pretty keen on encouraging people to replace sprockets even though they may not be worn. They make money out of it. Who's surprised?
In a perfect World, maybe, but in the real World it's wastage if there's no wear on the sprockets.

This is a fascinating thread.

This is the chain I was going to get because I initially was only going for tyres. I'm pretty pleased with the BT-45's but I wanted to give the Michelin a go. But I saw they do chains too. http://www.cheapmotorcycletyres.com.au/motorcycle-chains/rk-520-xso.html

It's probably more chain than I require but then the $60 dollar chains on ebay while probably being fine, are an unknown quantity for me. I keep vacillating but I'm leaning towards chain and sprockets. The tyres are costing 300 and the chain and sprockets push that up to $600. This is AUD btw. I don't feel like installing the chain myself, it's just one of those few things like fork seals that I don't want to do.

Quote from: Joolstacho on November 08, 2018, 03:35:17 PM
In a perfect World, maybe, but in the real World it's wastage if there's no wear on the sprockets.

How are you checking for wear?  Visual inspection?

That may not reveal wear or damage that could be critical.
If the chain itself can wear enough to stretch the length of several links it is causing hard wear on the sprocket as well.

It's the same like oil filters.  How do you know the filter doesn't have another 2 or 3 cycles in it?  It could be fine, but you change it anyway.
Not because the industry benefits because you're buying more filters, but because a filter that isn't 100% can risk your engine and the extra $15 for the filter is worth the security.

A worn sprocket is not only a potential to shorten chain life, bit can be a dangerous situation.
If there's even a shred of doubt, you change it.

So, how do you check chain and sprocket wear?
Well, I guess YOU might take out your micrometer and measure links and compare that to new specs (if you can find them). Then, ascertain sprocket wear using a micrometer?
Really, get in the REAL World!

The normal methods of checking chain and sprocket wear haven't changed (in the 50 years I've been dealing with it anyway). It's really not that hard is it?!
Sprocket wear is dead easy to pick by visual examination, -hooking and sprocket width wear. Chain wear is pretty easy too.

Some folks seem to take delight in making things more important than they need to be. Sigh... (It makes them feel important)

Point was, you aren't inspecting the sprockets to that level, you aren't seeing any minor damage, they're cheap and easy enough to change, so when in doubt change it out.

If they've got small miles on then whatever.  If they've got high miles but *look ok* I'd still change them.