How to Change the Oil in a 2013 Yamaha TTR50 Dirt Bike

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If you own a 2013 Yamaha TTR50, keeping up with oil changes is essential to ensuring your bike runs strong and reliably for years. Here's a complete, proprietary guide from MotoSport.com covering the tools you’ll need, a step-by-step process, and crucial model-specific tips for changing the oil on your TTR50.

Tools and Supplies Needed

  • 10W-40 motorcycle engine oil (Yamalube or equivalent, NOT automotive oil)
  • Oil catch pan (drain pan or Tupperware)
  • 17 mm socket and ratchet
  • Torque wrench
  • New crush washer (highly recommended)
  • Funnel (narrow enough for the small filler hole)
  • Gloves (optional but recommended)
  • Rags (for cleanup)
  • Motorcycle stand (optional, or use the kickstand)

Model-Specific Call-outs

  • The 2013 Yamaha TTR50 oil change process is the same across all TTR50 models and years from 2006 to present, including both carbureted and electric start models.
  • Engine oil capacity is 1.06 quarts (1.0 liter)
  • Always use motorcycle-specific oil without friction-reducing additives; the oil lubricates both the engine and the clutch. Using automotive oil can cause clutch slippage.
  • The drain bolt is located underneath the engine and uses a 17mm head.
  • Torque drain bolt to 15 ft-lb (20 Nm) after oil drain.

Preparation

  • Make sure the bike is on a level surface—either on a stand or on its kickstand. For best results, warm up the bike for a couple of minutes. This thins the oil and helps it drain more thoroughly.

Step-by-Step Oil Change Process

  • Step 1: Gather Tools and Materials
    Lay out your drain pan, funnel, socket/ratchet, torque wrench, gloves, rags, and new oil. Make sure you have a safe working area and the bike is secure.
  • Step 2: Warm Up the Engine (Optional, Recommended)
    Fire up your TTR50 and let it idle for 2-3 minutes. This helps thin the old oil so it drains more completely. Turn the bike off before continuing.
  • Step 3: Locate the Drain Bolt
    The oil drain bolt is on the bottom-left side of the engine case. Use the 17mm socket and ratchet to remove it. Place your oil catch pan directly beneath before loosening the bolt fully to avoid spills.
  • Step 4: Drain the Old Oil
    Let the oil drain fully—this can take several minutes. To facilitate draining, you can loosen (but do not fully remove) the oil filler cap on top of the engine. Be cautious; the engine and oil may be hot.
  • Step 5: Replace the Crush Washer (Recommended)
    Inspect the crush washer (located between the bolt and engine case). Replace it with a new one to prevent leaks.
  • Step 6: Reinstall the Drain Bolt
    Once the oil is finished draining, reinstall the drain bolt with the new or inspected washer. Tighten by hand, then torque to 15 ft-lb (20 Nm) for proper seal and to avoid stripping.
  • Step 7: Add New Oil
    Place the funnel in the filler opening and add fresh 10W-40 motorcycle oil. Yamaha specifies 1.06 quarts (1.0 liter) for this bike. In practice, add just under one full quart, then check the level.
  • Step 8: Check Oil Level
    With the bike upright and on a level surface, insert the dipstick (do not screw it in), then remove and check the oil level. Adjust as needed, being careful not to overfill. The oil should be between the low and high marks on the dipstick.
  • Step 9: Finish Up
    Wipe down any spilled oil, reinstall and secure the oil filler cap, and dispose of the old oil responsibly. Start the bike, let it idle briefly, and check for leaks around the drain bolt.
  • Step 10: Final Inspection
    Recheck the oil level after the engine has run and the oil has circulated, topping up as necessary.

Additional Tips and Warnings

  • Never over-tighten the drain bolt—follow the recommended torque.
  • Only use motorcycle-specific engine oils designed for wet clutch systems; automotive oils can damage the clutch performance.
  • Perform oil changes at the manufacturer’s recommended intervals, or after long or hard rides to extend the life of your TTR50’s engine.

Conclusion

Changing the oil in your 2013 Yamaha TTR50 is straightforward and keeps your bike performing at its best. Using the correct supplies and following proper torque specs protects your engine and clutch, so you can ride with confidence. Ride safe, and keep your maintenance on schedule.

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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.