Seems to be the same as a replacement carb that's being used on the Yamaha YFM 400. ( I think its some kind of quad bike )
http://www.amazon.com/gp/product/B00...4J2RKK6ZBHA4FT
if this is the same as yours then this exploded carb diagram maybe of use
http://www.yamahapartshouse.com/oemp...9a4/carburetor