1. Oil Type:
* 4-Stroke Engine Oil: The Yamaha 350 Warrior is a 4-stroke engine, so you need oil designed for 4-stroke motorcycles.
* Wet Clutch Compatible: Important! Many 4-stroke motorcycle oils contain friction modifiers that can damage wet clutches. Look for oil explicitly labeled as "wet clutch compatible."
2. Viscosity (SAE):
* Yamaha recommends SAE 10W-40 for general use. This is a versatile viscosity that performs well in various temperatures.
* Check your owner's manual: This will have the most accurate and up-to-date recommendations based on your specific model year and operating conditions.
3. Oil Quality:
* API Certification: Look for an oil with an API (American Petroleum Institute) rating, such as SJ, SL, SM, or SN. These ratings indicate quality and performance levels.
* JASO MA Certification: This Japanese certification is essential for wet clutch compatibility. It ensures the oil is formulated to prevent clutch slippage.
4. Additional Considerations:
* Climate: If you live in a very hot or cold climate, you may need to adjust the viscosity accordingly. Refer to your owner's manual.
* Riding Style: If you ride aggressively or in extreme conditions, you might consider using a high-performance oil that offers better protection under stress.
Recommended Brands:
* Yamaha Genuine Oil: The safest bet is to use Yamaha's own branded oil.
* Other reputable brands: Castrol, Motul, Mobil, etc. Just ensure they meet the above criteria.
Where to find the information:
* Owner's Manual: This is your primary source for information about your specific Yamaha 350 Warrior model.
* Yamaha Website: The Yamaha website will likely have a service and maintenance section with oil recommendations.
Please note: Never mix different types of oil. Use a consistent brand and type for best results.
It's always best to err on the side of caution. If you have any doubts, consult your local motorcycle shop or Yamaha dealer for expert advice.
