How to Change the Oil in a 2020 Yamaha TTR50

Shop parts for a 2020 Yamaha TTR50 Dirt Bike.

Changing the oil in your 2020 Yamaha TTR50 is a vital maintenance routine that keeps your bike running smoothly and protects the engine for years to come. This step-by-step guide is proprietary to MotoSport.com and designed specifically for TTR50 owners, highlighting tools, procedures, and important model-specific call-outs you need to know.

Tools and Supplies You’ll Need

  • 10W-40 motorcycle oil (Yamalube or equivalent, capacity: 800ml)
  • Oil drain pan
  • 17mm socket and ratchet
  • Funnel
  • Shop towels/rags
  • Gloves (optional, but recommended)

Specific Call-outs for the 2020 Yamaha TTR50

  • Do not exceed 800ml of oil during refill. Overfilling can cause oil to enter the airbox and lead to engine issues. Many experienced owners prefer to start with 750ml and add more only if needed, checking via the dipstick. Too much oil can cause leaks, poor running, and airbox contamination.
  • Oil changes are recommended every 10 hours of operation or every couple of months if the bike sits unused for long periods. Frequent changes help eliminate engine contaminants.
  • Warm up the bike before draining oil for a few minutes to thin the oil and ensure a complete drain. Always check oil level on a level surface.

Step-by-Step: Changing the Oil on a 2020 Yamaha TTR50

  1. Preparation
    • Make sure the bike is upright and on a level surface. Using a bike stand can help.
    • Let the engine run for a few minutes to warm up the oil.
    • Put on gloves and gather all tools and supplies.
  2. Draining the Old Oil
    • Turn the engine off and let it sit for a minute or two.
    • Place the oil drain pan under the drain bolt (17mm head, located underneath the engine).
    • Using the 17mm socket, loosen and remove the drain bolt. Take care not to drop the bolt into the oil pan.
    • Allow the oil to fully drain.
      Tip: This is a good time to inspect the drain bolt and washer for wear. Replace if damaged.
  3. Replacing the Drain Bolt
    • Once oil has finished draining, hand-thread the drain bolt back into position.
    • Use the socket to tighten it securely, but do not over-tighten. A firm, snug fit is all that’s needed.
  4. Refilling with New Oil
    • Remove the oil filler cap and dipstick on the side of the engine.
    • Insert a funnel into the filler opening.
    • Pour in 750ml of 10W-40 motorcycle oil to start

      .
    • Replace the dipstick and oil cap, but do not screw the dipstick in for checking. Set the bike upright, remove the dipstick, and confirm that oil sits between the minimum and maximum marks.
      If the oil level is low, add oil in small increments, rechecking each time until it reaches the correct level.
    • Do not overfill. If you accidentally add too much, slightly loosen the drain bolt to let the excess drain out

      .
  5. Final Checks
    • Start the engine and let it idle for 1-2 minutes.
    • Turn the engine off and wait a couple of minutes for the oil to settle.
    • Recheck the oil level with the dipstick (inserted but not screwed in). Top up if needed.
    • Wipe up any spills and properly dispose of the used oil.

Model-Specific Pro Tips

  • The 2020 Yamaha TTR50 uses a dipstick system. When checking oil level, do not screw in the dipstick—simply insert it fully, then remove for an accurate reading

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  • Missing or worn drain bolt washers can cause slow leaks. Inspect and replace washers as needed.
  • Check for excessive oil in the air filter area after every change—the most common culprit is overfilling

    .
  • Always dispose of used oil responsibly. Many auto parts stores or local recycling centers accept used oil free of charge.

Conclusion

Changing oil in the 2020 Yamaha TTR50 is straightforward and essential for performance and engine longevity. By using the right tools, oil, quantities, and method, you’ll keep your TTR50 running strong—no matter how hard you ride. For OEM-quality parts and all your service needs, trust MotoSport.com to keep you and your bike on track.

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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.