The Yamaha 350 Raptor is a four-stroke ATV, which means it has a separate engine oil system. This means the oil is stored in a separate tank and lubricates the engine internally.
You do need to change the engine oil regularly, typically every 5-10 hours of riding, depending on the conditions and manufacturer recommendations.
Mixing oil and gas is only necessary for two-stroke engines.
Always consult your owner's manual for specific instructions and maintenance recommendations for your Yamaha 350 Raptor.
