* Fuel ratios vary: The correct fuel-to-gas ratio is not universal and can depend on several factors, including:
* Specific model year: Even within the same model, different years can have slightly different engine configurations.
* Engine modifications: Aftermarket parts or modifications can change the ideal fuel mixture.
* Climate and altitude: These factors can affect engine performance and fuel requirements.
* Fuel type: The type of gasoline (regular, premium, etc.) can impact the ratio.
Where to find the correct ratio:
1. Your owner's manual: The most reliable source is your Yamaha YZ 125 owner's manual. It will have the specific fuel-to-gas ratio for your model year.
2. Yamaha website: You can often find technical documentation and service manuals on the Yamaha website.
3. Authorized Yamaha dealer: A local Yamaha dealer can provide you with the correct information.
Important note: Always use the fuel-to-gas ratio specified by the manufacturer. Using an incorrect ratio can lead to engine damage and performance issues.