Mileage by itself isn't the criteria for chain/sprocket change. If the chain still has quite a bit of adjustment left (and it sounds like it does) and the sprockets look good, I'd get more miles out of it. My FZ1 had almost 27,000 miles on the original chain and sprockets when I sold it and they all looked like new. As far as I know, the second owner never changed them either. A new chain and sprocket will run you some cash you could use for things that really need attention or a few nights out.

 

If you are concerned about it, loosen your chain, and check for any links that bind, also look at the link for out of rounding (oblong shaping) of the internal posts, check your sprocket for shark toothing ( there should be a flat spot on top of each tooth, not sharp). There is a good video on Revzilla about this. If none of thes conditions exist thaen you should be good to go.

 

I did check it this morn while cleaning it. All looks fine, just wondering what kind of mileage everybody was getting from OEM chain.

 

Replaced the chain on my FZ-09 at 15,500 miles, but not the sprockets. Looking at the first 8,000 miles or so, I should have cleaned and lubricated the chain more often. Good chance the chain would have lasted longer if I had done so. Learning how to replace the chain myself was a great experience, though.

http://www.fz09.org/forum/34-yamaha...21-oem-did-chain-multiple-seized-links-thoughts-chain-experts-5.html#post168401

 

Replaced the chain on my FZ-09 at 15,500 miles, but not the sprockets.

Always, always replace chain and sprockets together. New used with with half worn parts will accelerate wear on the new parts.

 

You can also check your chain by looking a the rear sprocket from the side, pull the chain away from the sprocket a 3:00, if more than half a tooth shows under the chain, the chain needs replacing. If there's substantially less than half a tooth showing, you've got a ways to go. Have a good ride.

 

Just changed mine yesterday at 17k
Had a few seized links.
Also countershaft was well worn.

As stated...I changed both front and rear along with the chain.

 

18000, chain and rear sprocket fine, front sprocket replaced at 17000

 

I replaced my chain a few weeks ago at 27500 kms I think that's around 15-16k miles. I replaced mine because I ride through the winter and I wasn't diligent about cleaning my chain and some links were seized or difficult to rotate. I plan to service the new chain more regularly so this doesn't happen again.

 

How much difference, in chain slack, between the tight and loose spots??? More than a couple tenths, replace chain AND sprockets.

 

Personally if I were to go as far as to change the chain then I would also change the sprockets. They're cheap enough and if you're going through the trouble of taking all the assembly apart you might as well.

It's worth it to save money in the long run and know you have a tight integrated system. It is your drive train after all. Somewhat important.

 

At least we revived a thread that's more than a year old!
Actually it is standard practice to change the sprockets along with the chain.
However, if you just can't live without that purple or green chain and your chain/sprockets only have a couple thousand miles on them------well, we understand.

 

If it were me, I'd change the chain/sprockets. 16,000 miles of aggressive riding seems like a large number and the penalty of having a chain failure during your trip is huge! You might be fine and chances are good that you'll make it but you must be kinda worried about it already or you would not ask the question. Given that, just for your own piece of mind, change it before you go on the trip. I assume that the tires are excellent as well.

 

21000 on chain & sprokets too big a difference between tight & loose spots when checking chain for adjustment