My 2011 XT660X has 23000 kms on the clock from new and I am a big maintenance fan so the chain has always been checked and lubed every weekend or 2. I had never really noticed that the chain was not ok, I have adjusted it only once. I recently discovered DID chain lube which I really like so now I use only DID. When I read on here about some chain problems I thought that changing chain and sprockets may be a good idea, I prefer prevention to cure, so I got a DID set fitted last week.

The bike seems like a new one!!!! The gearchange is smooth. The bike feels better and more flexible. The sound is better. I wish I had done this ages ago as I had not noticed how ropey my chain had become. Best 200 Euro ever spent on this bike. Wowowowowowowow.

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(Now sold on, sob) 2011 Blue XT660X with gold wheels, was 26,500 km.
Engine mods: K&N Stage 1 filter, DNA Stage 2 filter, snorkel removed, Kev fuel mod fitted.
Plus: smoked Puig screen, Yam aluminium sump guard, Yamaha / Acerbis handguards, Givi Trekker aluminium side cases, Leo Vince X3 cans plus Kev front fork mod and Fender Xtender. Just fitted Michelin Road Pilot 3 tyres.

SOLD the XTX for a Super Ten 1200. And just bought a Raptor 700 so staying on here for some tips....