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Hi, Had my '07 YZ250 engine rebuilt about 5 hours ago by a shop which has since closed. Doing an oil change on the weekend I was surprised to see something attached to the end of the drain bolt (10mm socket for reference). It's difficult to identify what pin this is, but I think it could be part of the YPVS Governor. I found another thread on this forum that starts with the discovery of a different pin but also ends up finding one that looks just like mine. So before I start taking things apart, I have some questions: What is the role of this pin? Is it the pin in the attached diagram? If so, being part of the governor assembly, is it likely to be related to a weak top end? That would be my only complaint of the engine when i received it back. Riding this bike back to back with an '08 , theirs felt terrifying. How could it have come loose? Installer error? Should I be concerned it will come loose again? Is there anything I can do to prevent it coming loose again? If it shows no signs of damage, is it safe to assume the internals (i.e. the parts that would require a case split to inspect) have not been damaged during its journey to the drain bolt? If not, what specifically should I check? Lastly this post hopes to serve as a bit of a reference for anyone else who finds something similar. Thanks guys