I called Yamaha corporate and the person I spoke with had no idea of this problem, AND had no part listing for this item, he kept referring me to an "authorized dealer" for more info. I also did what I think was a fairly extensive online search and found little info, and NO replacement part. I think I am going to take ours off, clean with carburetor cleaner and replace, probably do this with the oil change.

What phone number did you call and what department? Seems like someone else called and they new nothing. Could be who you talk to at
"corporate".