How to Change the Oil in a 2013 Yamaha PW50: Step-by-Step Guide

Shop parts for a 2013 Yamaha PW50 Dirt Bike.

Changing the transmission oil in your 2013 Yamaha PW50 is a quick but important maintenance task that helps ensure long engine and transmission life. This guide from MotoSport.com will walk you through the process, including specific model considerations, tools required, and each key step. The Yamaha PW50 uses a separate two-stroke engine oil tank, so this guide focuses on the transmission oil change.

Tools and Supplies Needed

  • 12mm socket and ratchet
  • Oil drain pan
  • Measuring cup (to ensure accurate oil refill)
  • Funnel (for clean pour)
  • Rags (for cleanup)
  • Rubber gloves (optional but recommended)
  • Replacement oil crush washer (recommended for every oil change)
  • Transmission oil, SAE 10W-30 or Yamaha-recommended oil

Model-Specific Call-Outs for the 2013 Yamaha PW50

  • This model uses a separate tank for two-stroke oil – ensure that's topped up but do NOT add engine oil to the transmission case.
  • Transmission Oil Quantity: 0.30 L (0.32 US qt, 0.26 Imp.qt)
    Do not overfill or underfill.
  • Drain Bolt Torque: 14 N·m (10 lb·ft) – overtightening may damage the threads.

Step 1: Prep the Bike and Work Area

  • Warm up the bike for a few minutes to allow the oil to thin. This helps it drain more thoroughly.
  • Turn the engine off and place the PW50 securely on a stand or level ground.
  • Put on your gloves and place your drain pan under the transmission drain bolt.

Step 2: Remove the Transmission Oil Drain Bolt

  • With your 12mm socket, remove the transmission oil drain bolt (located on the bottom of the transmission case).
  • Allow all oil to drain out into your pan. This should take a couple of minutes.
  • Inspect and replace the crush washer on the drain bolt if worn or damaged; always recommended for a leak-free seal.

Step 3: Reinstall the Drain Bolt

  • Once the oil has fully drained, clean the drain bolt and area around the opening.
  • Thread the drain bolt back in by hand to avoid cross-threading, then tighten with your 12mm socket to 14 N·m (10 lb·ft).

Step 4: Add New Transmission Oil

  • Locate and remove the transmission oil filler cap.
  • Position your funnel in the opening.
  • Pour in 0.30 liters (300ml) of the recommended SAE 10W-30 or Yamaha-specific transmission oil. Use your measuring cup for accuracy – overfilling can cause leaks and pressure issues, while underfilling risks transmission wear.

Step 5: Finish Up

  • Clean any spilled oil off the engine and cases with rags.
  • Reinstall and tighten the transmission oil filler cap by hand.
  • Start the engine and let it idle for a minute. Check for any drips or leaks at the drain bolt and filler cap.
  • Dispose of the old oil responsibly – your local auto parts store or recycling center can assist.

PW50 Oil Change Tips and Common Pitfalls

  • Change Interval: For a new bike, change the transmission oil after 1 month, then again at 6 months. For ongoing maintenance, change it yearly or after every 25 hours of riding, whichever comes first.
  • Don’t confuse the two-stroke engine oil tank with the transmission oil fill. Always add oil to the correct location to avoid engine damage.
    • Overtightening either the fill or drain bolt can easily damage fragile threads. Use a torque wrench if possible.
  • Check that the two-stroke oil tank is full and the cap secure every ride.

Questions 2013 Yamaha PW50 Owners Frequently Ask

  • Can I use automotive engine oil for the transmission? — No; always use a gear/transmission oil with the specification recommended in the manual. This helps protect gears under motorcycle-specific loads.
  • Why is the oil milky/discolored? — If the transmission oil is milky, water may have entered the system (through a pressure wash or cross-contaminated seal). Change the oil immediately and monitor for further issues.
  • Do I need to replace the crush washer every oil change? — For leak prevention, yes. These washers are designed for single use.

Conclusion

A transmission oil change on the 2013 Yamaha PW50 is straightforward and vital for smooth operation. Always follow the recommended quantities and use high-quality oil suited for the PW50’s small transmission. Keeping up with annual oil changes will help your mini dirt bike deliver years of reliable fun for your rider.

MotoSport.com offers a complete line of OEM and aftermarket service items for the Yamaha PW50 – from crush washers to oil change kits and the right transmission oil for every ride.

Related Shopping Categories

Shop Motor Oil for a 2013 Yamaha PW50 Dirt Bike.

Shop Oil Filters for a 2013 Yamaha PW50 Dirt Bike.

Shop Oil Drain Pans for a 2013 Yamaha PW50 Dirt Bike.

Shop Tools for a 2013 Yamaha PW50 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2013 Yamaha PW50 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.