Has anyone heard of the bottom of the choke plate breaking off and getting sucked into the engine? Is this a common occurance? I just picked up my revalved and resprung suspension at Precision Concepts today and they were giving me the hard sell on buying a replacment steel choke plate. They said that they fail frequently and it's a $1000 plus repair. I did a search on this forum and found some choke plate failures on XR600s.