Disclaimer: Before performing any work on your carburetor, ensure you have the necessary tools and a clean work environment.
1. Preparation:
- Let your Yamaha 660 engine cool down if you have been riding.
- Remove the fuel line from the carburetor's fuel inlet to drain the fuel.
- Locate and remove the carburetor from your Yamaha 660 following your motorcycle's service manual.
2. Disassembly:
- Once the carburetor is removed, disassemble its components carefully, including the float bowl.
- Remove any dirt or debris from the carburetor and float bowl using a cleaning agent and compressed air.
3. Float Bowl Level Adjustment:
- Identify and inspect the float valve needle for any damage or wear. Replace it if necessary.
- Adjust the float height (fuel level) within the float bowl according to the specifications provided in your Yamaha 660 service manual.
- Typically, the float height is measured with the carburetor inverted, and the float should be parallel to the gasket surface of the float bowl.
- Use small shims or adjust the tang that controls the float valve to obtain the specified fuel level.
4. Reassembly:
- Once the float height is set, carefully reassemble the float bowl and the carburetor.
- Ensure all the gaskets and O-rings are correctly seated and undamaged.
5. Installation:
- Reinstall the carburetor to your Yamaha 660 following the service manual instructions.
- Reconnect the fuel line and prime the carburetor according to the manual's guidelines.
6. Testing:
- Start the engine and observe the fuel level in the float bowl (if accessible) to ensure that the adjustment was successful.
- If any leaks are present, inspect and tighten the necessary connections.
- Test ride the motorcycle and monitor the engine's performance and fuel consumption to ensure proper operation.
Note:
Remember that carburetor adjustments can vary between different motorcycle models and years. Always refer to the Yamaha 660-specific service manual for precise and accurate guidelines.
