you want one like this!!!
http://www.bikepics.com/pictures/650865/
http://www.bikepics.com/pictures/650866/
http://www.bikepics.com/pictures/650867/
On the serious side, when mine went i had the complete top end redone, at a great cost, but a week after it came back it went again!!!!!, It appears altough the crank cases where flushed there may still have ben a bit of ring still in there (not comfirmed yet but will soon) as the same barrel went and JAMMED solid this time. if you have the time dont rely on a flush take the crank OUT and have a good look. that way youll be 100% sure when you put it back!