1. Remove the air cleaner assembly.
2. Cover the carburetor with a clean rag to prevent metal particles from getting inside. Using a 4mm drill, drill out the rivets holding the cover. Remove the fixing ring.
3. Remove the cover.
For installation:
4. Install the cover so that the index marks are aligned.
5. Install the retaining ring and secure it with new rivets.
6. Install the air cleaner.