Well on Friday the 13th on my way to work something bad happened to my engine. I was overtaking a bunch of cars probably spinning around 7 thou RPM, when I pulled back in the exhaust sounded louder and it felt like it was running on 1 cylinder. I pulled over, it died, I started it again and same thing except that there was a knock coming from the lower part of the engine. I decide to turn around and try and make it back home and I make it maybe 500 feet and she dies completely and wont even turn over. My bike is a 2000 M900S with 47,000 kms or 30,000 miles, well maintained, not thrashed. I dumped the oil and apart from very small pieces of aluminum there was a steel part that was corrugated, .060 thou wide, with slits in it (oil ring?) any body out there have a stock piston let go? Is that it? any ideas? Any feedback much appreciated.