How to Change the Oil in a 2007 Yamaha TTR125L: Step–by–Step Blog

Shop parts for a 2007 Yamaha TTR125L Dirt Bike.

Changing the oil on your 2007 Yamaha TTR125L is one of the most crucial and straightforward maintenance tasks to ensure your dirt bike's engine remains in peak condition. Fresh oil lubricates internal components, minimizes engine wear, and boosts overall performance. Here's a thorough step-by-step guide specifically tailored for your TTR125L, exclusively by MotoSport.com.

Tools and Supplies Needed

  • 10mm socket or wrench (for the oil drain bolt)
  • Ratchet and extension
  • Oil catch pan
  • Clean rag or shop towels
  • Funnel
  • Fresh engine oil (Yamalube 4 10W-40 or your chosen motorcycle 4-stroke oil)
  • Replacement crush washer for the drain bolt (recommended)
  • Gloves (optional, but recommended for cleanliness)

Step 1: Warm Up the Engine

  • Start your TTR125L and let it idle for a few minutes to warm up the oil. Warm oil drains faster and carries away more contaminants.

Step 2: Secure the Bike

  • Place the bike on its side stand. The TTR125L drain bolt is on the left side and sitting on the side stand positions the bike perfectly for draining oil.
  • Optionally, you can put the bike in gear or use a strap on the front brake lever to prevent rolling.
Specific TTR125L Note:
  • The 2007 TTR125L's oil drain bolt is easily accessible on the left side by the “waffles” section of the engine case, rather than underneath, making removal and reinstallation convenient.

Step 3: Remove the Oil Filler Cap

  • Locate the oil filler cap and dipstick (right side of the engine). Unscrew and remove the dipstick to allow the oil to flow freely.

Step 4: Drain the Old Oil

  • Position your oil catch pan directly under the drain bolt.
  • Using your 10mm wrench or socket, loosen and remove the drain bolt. Take care not to strip the threads—you just need it snug again during reinstallation, not overtightened.
  • Allow all the old oil to drain out. It helps to lean the bike slightly or kick the engine over a few times (with the kill switch off) to ensure you get all the old oil out.

Step 5: Inspect and Clean

  • Check the crush washer on the drain bolt for cracks or flattening. Replace it if damaged to prevent future leaks.
  • Wipe down the drain bolt and the area around the oil drain to ensure a clean, tight seal when reinstalling.

Step 6: Reinstall the Drain Bolt

  • Once the oil has fully drained, thread the drain bolt back into place by hand—do not cross-thread.
  • Tighten the bolt with your wrench until snug. Avoid over-torquing, which can strip the threads in the soft aluminum engine case. Just snug is sufficient.

Step 7: Add New Oil

  • Using a funnel, fill the engine with fresh oil. For the 2007 Yamaha TTR125L, the capacity is typically around 1.0 liter (1.06 US quarts), but always verify with your owner's manual or the stamped numbers found right on the engine case.
  • Pour slowly to avoid overfilling.

Step 8: Check the Oil Level

  • After filling, let the bike rest a minute for oil to settle.
  • With the bike upright and level (ask someone to help you balance it if needed), insert the dipstick without screwing it in, then remove it and check the oil level. It should be between the “minimum” and “maximum” notches.
  • Add more oil if necessary, repeating the process until it's at the proper level.

Step 9: Final Inspection

  • Reinstall the dipstick. Start the engine and let it idle for a couple of minutes, then shut it off and check for any leaks around the drain bolt or filler cap.
  • After a few minutes, recheck the oil level and top off if needed.

Important Notes for 2007 Yamaha TTR125L Owners

  • The oil drain bolt is uniquely placed to the left side of the crankcase, not at the bottom. This design makes oil changes easier for DIY owners.
  • Torque values are moderate; overtightening can strip the soft aluminum threads, so never use excessive force when reinstalling the drain bolt.
  • The manufacturer places helpful oil capacity numbers right on the engine case, making it easy to reference during filling.
  • While the procedure is consistent across almost all TTR125 models, always consult your specific owner's manual for oil type recommendations and capacities.

Disposal Reminder

  • Always dispose of used oil responsibly at an approved recycling center or auto parts store.

That's it. Your 2007 Yamaha TTR125L should now have fresh oil and be ready for your next adventure. Check your oil before each ride and enjoy reliable, long-lasting engine life. For genuine parts, maintenance kits, and more expert tips, visit MotoSport.com.

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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.