My brothers ttr 250's carb was all gummed up so I took it down to clean it. When I pulled the bowl off this part came out. Well it doesn't seem to go anywhere and I have asked several mechanics about it and nobody knows what it is or where it goes. I cant even find it on the schematics. All I know is it fell out from the bowl area. The bike runs great while throttling but wont start without a shot of starter fluid and then it wont idle. (I put it back together without this part just to see) Any help would be great. Thanks.