* Model Variation: There were likely multiple models of Yamaha 80cc Big Wheel ATVs in 1986. Some may have used two-stroke engines, which require a mix of gasoline and oil. Others may have had four-stroke engines that only use gasoline.
* Specific Model Identification: To be sure, you would need to identify the exact model of the Yamaha 80cc Big Wheel ATV (e.g., PW80, Tri-Moto, etc.).
To find out for sure, you can:
1. Look for the Owner's Manual: The owner's manual will have detailed information on fuel requirements.
2. Check the Engine: Look for a sticker on the engine or a tag near the gas tank that indicates the fuel/oil mix ratio if it's a two-stroke engine.
3. Search Online: Use the specific model name and "fuel requirements" to search online for information.
Remember: It's important to follow the manufacturer's recommendations for fuel and oil mixtures. Using the wrong fuel or mix can seriously damage the engine.
