How to Change the Oil in a 2019 Yamaha TTR50 – MotoSport.com Proprietary Guide

Shop parts for a 2019 Yamaha TTR50 Dirt Bike.

Keeping your 2019 Yamaha TTR50 running smoothly relies on regular oil changes. This comprehensive, step-by-step guide provides everything you need, from tools and supplies to model-specific tips for Yamaha's popular dirt bike.

Tools & Supplies Needed

  • 10W-40 engine oil (approximately 800 ml, but begin with 750 ml and top up as needed)
  • 17mm socket and corresponding ratchet
  • Oil drain pan
  • Funnel (to reduce spills when refilling)
  • Gloves (recommended – keeps your hands clean and protected)
  • Paper towels or rags (for cleanup)

Preparation

  • Start the bike and let it warm up for a few minutes. Warm oil will drain more efficiently and carry away more contaminants.
  • Shut off the engine and ensure the bike is positioned upright on a stable, level surface (a bike stand is ideal).
  • Allow the engine to cool just enough so as not to burn yourself, but not so long that the oil thickens again.

Step-by-Step Oil Change Instructions

  1. Locate the Oil Drain Bolt:
    • The drain bolt is on the bottom of the engine case. Use your 17mm socket to access it.
  2. Position Oil Pan:
    • Slide the oil drain pan underneath the bolt to catch all used oil.
  3. Remove the Drain Bolt:
    • Carefully loosen the bolt. Be aware the oil might flow quickly once the bolt is out.
    • Let the oil drain completely – this usually takes a several minutes.
    • Avoid dropping the bolt into the oil pan.
  4. Replace the Drain Bolt:
    • Wipe any residue from the bolt and threads.
    • Reinstall the bolt once draining stops. Do NOT overtighten; just a firm snug is plenty.
  5. Remove the Oil Filler Cap:
    • The filler cap is located on the right side of the engine. Remove it to prepare for refilling.
  6. Add Fresh Oil:
    • Insert a funnel and pour in about 750 ml of 10W-40 engine oil. Do NOT exceed 800 ml total.
    • Check the oil level with the dipstick (see below for instructions).
    • Add more oil as needed, but always err on the side of slightly underfilling at first.
  7. Check the Oil Level:
    • With the bike upright, insert the dipstick into the filler hole without screwing it in. Remove and inspect the oil level.
    • The oil should be between the minimum and maximum marks.
    • If the level is low, add a small amount at a time; if overfilled, remove excess oil by loosening the drain bolt slightly.
  8. Replace and Secure the Filler Cap:
    • Once the proper oil level is reached, install the dipstick and tighten the filler cap securely.
  9. Start and Recheck:
    • Start the engine and let it idle for a minute or two. Turn off and let the oil settle.
    • Recheck oil level and top off if needed.
  10. Clean Up:
    • Dispose of old oil safely according to your local regulations.
    • Wipe down any drips and ensure your work area is clean.

Yamaha TTR50 (Model-Specific Callouts)

  • Oil Capacity: Use 800 ml of oil maximum. Overfilling can lead to issues such as oil blow-by and airbox contamination. It’s safer to use 750 ml, check the level, and top up as needed.
  • Check Oil Regularly: Too much or too little oil can damage the engine. Always check on a level surface, and only when the oil has had a few minutes to settle after running.
  • Dipstick Use: Never screw the dipstick in when checking the oil level; simply insert it and remove for an accurate reading.
  • Warm the Engine: Change oil after a short warm-up for best results.
  • Interval Recommendation: Change oil every 10 hours of riding, or every few months if unused for long periods.
  • Engine Protection: Using the correct type and amount of oil is a major factor in keeping the TTR50’s engine reliable for years.

Frequently Asked Questions

  • Can I use another oil weight? Always use 10W-40 as recommended by Yamaha for best performance and protection.
  • What happens if I overfill? Excess oil can end up in the air filter or cause leaks, so always carefully measure and check the dipstick.

Performing routine oil changes on your 2019 Yamaha TTR50 will keep your bike running at its best. Use this guide—and the right oil and tools—to ride with confidence.

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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.