My '05 WR450 has a fuel leak. The brass 90 degree fitting for the gas line to the tank has o-rings sleeved into the carb body, and they've failed. This has happened once before and the local Yamaha dealer could only supply generic rings they had in stock. When they've looked at the parts computer, the diagram doesn't show this spigot separated from the carb body. Anybody else have this problem? Might have to call Yamaha's tech center and do some hollering tomorrow.