How to Change the Oil in a 2007 Yamaha TTR125: Step-by-Step Guide

Shop parts for a 2007 Yamaha TTR125 Dirt Bike.

Regular oil changes are crucial for the performance and longevity of your 2007 Yamaha TTR125. This dirt bike is known for its reliability and ease of maintenance, and an oil change is one of the simplest tasks you can do yourself. Below is a comprehensive, proprietary guide for MotoSport.com customers, tailored specifically to the TTR125 model year 2007.

Tools and Supplies Needed

  • 10mm or 12mm socket wrench (most sources report a 12mm drain bolt, but verify on your bike)
  • Oil drain pan
  • Funnel
  • Shop rags or paper towels
  • Gloves (optional, for cleaner hands)
  • Fresh engine oil (10W-40 Yamalube or equivalent, 1 quart/1000 ml)
  • Torque wrench (if you want to be precise: set to 15 lb-ft for the drain bolt)

Model-Specific Callouts for 2007 TTR125

  • No oil filter to replace. The TTR125 uses a simple oil screen you don't need to service during regular oil changes.
  • Side drain bolt location:– Unlike many bikes with a bottom drain, the TTR125—s oil drain bolt is on the left side of the crankcase, below and slightly behind the engine.
  • Single drain bolt:– Only one drain bolt to remove. Don't over-tighten it when reinstalling. The aluminum threads can strip if over-torqued.
  • O-ring on drain bolt:– Ensure the O-ring stays in place and is in good condition to prevent oil leaks.

Step-by-Step Instructions

1. Warm Up the Engine

  • Start your TTR125 and let it idle for about 2-3 minutes. This allows the oil to warm up, helping it drain more completely and efficiently.

2. Secure the Bike

  • Place the bike on its kickstand. The slight lean helps ensure a better drain since the oil bolt is already low on the left side.

3. Prepare Your Workspace

  • Place the oil drain pan directly under the drain bolt on the left side of the engine.
  • Have your tools, funnel, and fresh oil ready.

4. Remove the Oil Drain Bolt

  • Using your 12mm socket, carefully loosen and remove the drain bolt with the attached O-ring. Oil will begin to flow immediately, so make sure the pan is in place.
  • Allow the oil to drain completely. For a more thorough drain, you can gently kick the starter a few times with the bike OFF to help move remaining oil out

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5. Reinstall the Drain Bolt

  • Check the O-ring on the drain bolt for cracks or damage. Replace if necessary.
  • Reinstall the drain bolt by hand to ensure correct threading, then snug it up with your socket wrench. If using a torque wrench, tighten to 15 lb-ft

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  • Do not over-tighten. The threads are aluminum and can strip easily

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6. Add Fresh Oil

  • Locate the oil fill cap on the right side of the engine above the footpeg.
  • Remove the cap and, using a funnel, pour in approximately 1 quart (1000 ml) of quality 10W-40 motorcycle oil

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  • Replace the oil fill cap and ensure it's snug.

7. Check the Oil Level

  • Start the engine and let it idle for 30-60 seconds, then shut off and let it sit for a minute.
  • With the bike upright (not on the kickstand), remove the dipstick, wipe it clean, reinsert completely, then remove to check the level.
  • The oil should sit between the top and bottom marks. Add oil as needed, repeating the process as necessary

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8. Clean Up and Dispose of Old Oil

  • Wipe down any oil drips, double-check both the drain bolt and fill cap for tightness.
  • Take your used oil to a certified recycling center or auto parts store for safe disposal

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Additional Tips for 2007 Yamaha TTR125 Owners

  • Change oil every 10-15 hours of ride time, or at least once every riding season for occasional use.
  • Check for leaks at the drain bolt after your first ride post-change.
  • If you ride aggressively or in harsh conditions, consider changing oil more frequently.

You're Ready to Ride.

The TTR125 is one of the easiest dirt bikes to maintain, and following this oil change process will help keep your 2007 Yamaha running strong for years. For more maintenance tips and OEM parts, always shop at MotoSport.com.

Related Shopping Categories

Shop Motor Oil for a 2007 Yamaha TTR125 Dirt Bike.

Shop Oil Filters for a 2007 Yamaha TTR125 Dirt Bike.

Shop Oil Drain Pans for a 2007 Yamaha TTR125 Dirt Bike.

Shop Tools for a 2007 Yamaha TTR125 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2007 Yamaha TTR125 Dirt Bike.

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.