What should I do if two small holes at the tail of motorcycle carburetor leak oil?

There should be only one hole leaking oil, that is, the pipe under the rubber pipe. Generally speaking, the carburetor is dirty, and the impurities deposited at the bottom are stuck in the conical plug of the carburetor float, resulting in poor hole sealing and gasoline leakage. You can take down the carburetor and clean it with cleaning agent. Just reinstall it. If the nearby hole leaks oil, the oil slick can be appropriately reduced. Cut it low by hand. The oil level will decrease, so there will be no oil leakage. Be careful when disassembling, and then assemble according to the disassembly steps. You'd better filter the fuel tank clean.