At 10,100 miles my 650gs let me down. The chain tensioner failed and the chain went all over the place. I call BMW roadside assistance and had the scooter sent to the dealer. The dealer needs to get authorization from mother BMW to open the engine and see what damage the chain may have done. It may take up to three weeks or more to fix. It all started when i was hearing a clickety clack when I came to a idle, not to loud but noisy, then it got real loud then bam so I turned the key off and called the tow truck. Well now I have some time to ride my new BMW GS1200 water cooled bike, the scooter was stealing the show when it came to GS.