How to Change the Oil in a 2006 Yamaha PW50 – MotoSport.com DIY Guide

Shop parts for a 2006 Yamaha PW50 Dirt Bike.

Changing the transmission oil in your 2006 Yamaha PW50 is quick, simple, and essential for keeping your bike running smoothly. Follow this step-by-step guide, proprietary to MotoSport.com, to ensure you do it safely and effectively.

Tools and Supplies Needed

  • 12mm socket and ratchet – for removing the drain bolt
  • Oil drain pan – to collect old transmission oil
  • Measuring cup – for accurate oil filling
  • Funnel – to avoid spills when adding new oil
  • Replacement transmission oil – Yamaha recommends specific oil; see notes below
  • New crush washer – replace every time you change the oil
  • Rubber gloves and rags – for cleanliness and safety

Recommended Oil Type and Amount

  • Recommended oil: Use the oil specified by Yamaha; avoid mixing additives, diesel-spec “CD” oils, or any “ENERGY CONSERVING II” oils to prevent clutch issues.
  • Oil quantity: Approximately 0.12 liters (120 mL) for the transmission – check your owner's manual for exact spec.

Step-by-Step Guide

  1. Warm Up the Engine
    • Start and idle the PW50 for a few minutes. This helps the oil flow out easily and removes more contaminants.
  2. Secure the Bike
    • Place the motorcycle upright on its centerstand to ensure proper drainage.
  3. Drain the Old Oil
    • Place the oil drain pan under the transmission case.
    • Remove the oil filler cap to allow air in (making drainage faster).
    • Use your 12mm socket to remove the transmission oil drain bolt located on the left side of the engine.
    • Let all the old oil drain completely into your pan.
    • Inspect and clean the drain bolt.
    • Replace the crush washer before re-installing the drain bolt.
  4. Reinstall Drain Bolt
    • Reinstall the drain bolt with new washer and tighten it to 14 Nm (1.4 m-kg); do not overtighten. Use a torque wrench if available.
  5. Add New Transmission Oil
    • Insert a clean funnel into the oil fill hole.
    • Measure and pour in the recommended amount of oil (0.12 liters/120 mL).
    • Replace and tighten the oil filler cap.
  6. Check for Leaks and Final Steps
    • Start the engine and let it idle for several minutes.
    • Check the area around the drain bolt and filler cap for any leaks. If you find leaks, immediately shut off the engine and inspect your work.
    • Clean up any spilled oil and properly dispose of the used oil.

PW50-Specific Tips and Callouts

  • The PW50 has a separate transmission oil system from the two-stroke engine oil injection system; do not confuse the two. Check and top off your injector oil in the tank behind the number plate using only two-stroke injector oil.
  • Never use automotive or energy-conserving oils as they may cause clutch slippage or damage.
  • New bike break-in: Change the oil after the first month of riding, then again after six months, then annually. Longer or harder use may call for more frequent changes.
  • Always inspect for leaks and worn parts when performing oil changes.
  • Use the correct torque on the drain plug to avoid damaging the soft aluminum threads.

When To Change

  • First service: After one month of riding a new or rebuilt engine.
  • Second service: At six months or moderate use.
  • Afterwards: Annually, or more often for heavy use.

Final Reminders

  • Changing your Yamaha PW50’s transmission oil is simple, takes less than 10 minutes with the right tools, and is critical for preventing premature wear and clutch issues.
  • Consult your owner’s manual for maintenance intervals and specifications for your bike.

Your 2006 Yamaha PW50 will reward you with years of reliable service if you keep up with essential maintenance like this. For OEM and performance parts, visit MotoSport.com – your headquarters for all things dirt bikes.

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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.