How to Change the Oil in a 2014 Yamaha TTR50

Shop parts for a 2014 Yamaha TTR50 Dirt Bike.

The Yamaha TTR50 is a popular beginner dirt bike, and regular oil changes are essential for ensuring its engine remains reliable and efficient. Performing an oil change yourself is straightforward if you follow these steps and have the proper tools on hand. Here is a detailed, MotoSport.com-exclusive guide for changing the oil in a 2014 Yamaha TTR50, including model-specific call-outs every owner should know.

Tools and Materials Needed

  • 10W-40 motorcycle oil (Yamalube is highly recommended by Yamaha)
  • Measuring cup or container (to ensure accurate oil amount)
  • Oil catch pan/tray
  • 12 mm socket and ratchet (for newer bikes; check your drain bolt size)
  • 17 mm socket (some TTR50 iterations use a 17 mm drain bolt – check your specific bike before beginning)
  • Torque wrench (for proper tightening of the drain bolt)
  • New crush washer (recommended to replace at every oil change)
  • Funnel
  • Rags and gloves (for safety and cleanup)

Yamaha TTR50 (2014) Oil Capacity and Call-Outs

  • Recommended oil type: 10W-40 motorcycle oil (use only motorcycle-specific oil; automotive oils with friction modifiers can lead to clutch slipping)
  • Oil capacity: 0.8 liters (800 ml) when changing oil only
    Note: You might see recommendations to use a full quart (~946 ml), but adding slightly less (750–800 ml) then topping off to the dipstick ensures you do not overfill, which can cause issues like oil in the airbox.
  • Always change the oil after the engine is warm (this helps impurities drain with the oil, and hot oil flows out more completely)
  • The engine houses both the engine and clutch oil, so always use oil designed for wet clutches

Step-by-Step Instructions

  1. Warm Up the Engine
    • Start the bike and let it idle for a few minutes. This reduces oil viscosity, helping it drain out more thoroughly.
  2. Set Up and Remove Filler Cap
    • Place the bike upright and level (not on its kickstand). Place your oil catch pan underneath the engine. Unscrew the oil filler cap and set it aside – this helps oil drain smoothly.
  3. Remove Oil Drain Bolt
    • Locate the oil drain bolt beneath the engine (consult your manual, but it should be easily visible on the engine—s underside).
    • Use the proper socket (12 mm or 17 mm depending on year/model) and loosen the drain bolt. Remove it by hand towards the end to prevent dropping it in hot oil.
    • Let the oil completely drain into your catch pan. Be careful, as oil may be hot.
    • Take note of the crush washer on the drain bolt. Replace the crush washer every oil change to minimize leaks.
  4. Install the Drain Plug
    • After all oil has drained (wait several minutes), install the drain bolt and new crush washer.
    • Hand-tighten, then use a torque wrench to tighten to 15 lb-ft (20 Nm).
  5. Add New Oil
    • Insert a funnel into the oil filler hole.
    • Slowly pour in approximately 750–800 ml (0.8 L) of fresh 10W-40 motorcycle oil.
    • If you overfill, you can drain excess easily through the drain plug.
  6. Check the Oil Level
    • With the bike level, insert the dipstick without screwing it in.
    • Check that oil registers between the minimum and maximum marks. Add oil as needed, but do not exceed the max line (overfilling causes performance issues).
  7. Reinstall Oil Filler Cap
    • Reinstall and tighten the filler cap. Wipe away excess oil and clean up any spills.
  8. Run and Re-check
    • Start the engine and let it idle for a couple minutes. Shut off, allow oil to settle briefly, then re-check the level as above, topping off if necessary.
  9. Dispose of Used Oil Responsibly
    • Take your old oil to a recycling center or auto parts store. Do not pour it down the drain or onto the ground.

2014 Yamaha TTR50–Specific Tips and Considerations

  • Only use motorcycle-specific oil, as the TTR50's engine shares lubrication with the clutch, and automotive oil additives can cause slippage and premature clutch wear.
  • Do not overfill: Overfilling may lead to oil blowing into the air box or fouling the air filter. It can also rob the engine of power.
  • Maintenance interval: Change oil every 10–20 hours of runtime or at least every few months, even if the bike isn't ridden frequently.
  • Always visually inspect the drained oil for signs of metal flakes or milky color (water contamination), which could indicate a larger problem.
  • If you are unsure of your drain bolt size, inspect before starting. Some guides mention both 12 mm and 17 mm bolts for different production years.

Final Thoughts

Changing your 2014 Yamaha TTR50's oil is a simple DIY task any owner can perform with a few basic tools. It's one of the most important maintenance jobs you can do, ensuring long engine life and top performance. Stick with the right oil type and amount, always check your oil level carefully, and enjoy more reliable rides from your TTR50.

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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.