Been lurking for some time now and, have read the many posts on valve check/adjust intervals. I've had my 2011 for ten months and have over 20,000 miles on her now. I recently called my local dealership with whom I have a very good relationship with and asked the service manager about this topic. He checked his service manual and bulletins regarding the Versys for me. Final word......his information shows a 26,200 mile interval for valve check / adjust. Just my .02 worth on the topic.