How to Change the Oil in a 2015 Yamaha TTR50: A Complete Guide

Shop parts for a 2015 Yamaha TTR50 Dirt Bike.

Regular oil changes are essential for maintaining the health and performance of your 2015 Yamaha TTR50 dirt bike. This step-by-step guide, proprietary to MotoSport.com, covers everything you need: required tools, detailed instructions, and specific call-outs for the TTR50 model. Get ready for a quick, efficient oil change and keep your TTR50 running its best.

Tools & Supplies Needed

  • 10W-40 engine oil (Yamalube recommended)
  • Oil catch pan
  • 17mm socket with ratchet
  • Torque wrench (for precise tightening)
  • Funnel (for clean pouring)
  • Disposable gloves (optional, for cleanliness)
  • Shop rags
  • Motorcycle stand (optional, helps steady the bike)

Before You Begin: Key Info for the 2015 Yamaha TTR50

  • Engine takes just under 1 quart of oil. Do not overfill.
  • Drain bolt uses a 17mm head. Tightening torque spec is 20 N·m (15 lb·ft).
  • Always warm the engine for a few minutes before draining oil. Warm oil flows out easier and removes more contaminants.
  • Make sure the dirt bike is upright and on a level surface when checking oil level or refilling.

Step-by-Step Oil Change Process

  1. Warm Up the Engine
    • Start the TTR50 and let it idle for 3–5 minutes. This warms the oil for complete draining.
  2. Prepare Your Workspace
    • Use a motorcycle stand or ensure the bike is stable and upright on level ground.
    • Place the oil catch pan directly under the drain bolt (on the left side, near the bottom of the engine).
  3. Remove the Drain Bolt
    • Put on gloves. With a 17mm socket and ratchet, carefully loosen and remove the drain bolt.
    • Let oil fully drain; this may take several minutes. Be careful, as hot oil can cause burns.
  4. Inspect & Replace the Drain Bolt Gasket (if needed)
    • Check the condition of the bolt's sealing washer/gasket. Replace if cracked or flattened.
  5. Reinstall the Drain Bolt
    • Wipe the area clean with a rag. Reinstall the drain bolt with your fingers first to avoid cross-threading.
    • Using a torque wrench, tighten the bolt to 20 N·m (15 lb·ft)—do not overtighten.
  6. Add Fresh Oil
    • Remove the oil filler cap/dipstick on the right side of the engine.
    • Insert a funnel and pour in new 10W-40 oil; add gradually, stopping just short of 1 quart.
    • After adding, wait a minute for oil to settle in the crankcase.
  7. Check the Oil Level
    • With the bike upright and level, insert (but don’t screw in) the cleaned dipstick, then remove and check that the oil falls between the min and max marks.
    • If needed, add small amounts of oil and recheck.
    • If you accidentally overfill, loosen the drain bolt slightly to remove excess oil until it's correct.
    • Overfilling can cause oil blowby, leaks, or force oil into the airbox—always double-check the level.
  8. Final Steps
    • Reinstall and tighten the oil filler cap/dipstick securely.
    • Start the bike and run for 1–2 minutes, shut off, wait, then recheck oil level and top up if needed.
    • Wipe up any spills and check for leaks around the drain bolt.
    • Properly dispose of old oil according to local regulations.
  9. Clean Up & Inspect
    • Clean your tools and double-check that all fasteners and the dipstick are tight.
    • Check tires and give the bike a once-over while you’re at it.

Yamaha TTR50-Specific Call-outs

  • All Yamaha TTR50 models (including your 2015) follow the same oil change procedure and use the same 17mm drain bolt and torque value.
  • No separate oil filter or screen service is required for standard oil changes on this model.
  • If riding in dusty or wet conditions, consider changing oil more frequently for maximum engine longevity.

Troubleshooting & Tips

  • If oil is milky, smells of fuel or burned, or you notice metal shavings, seek professional service—these may indicate internal problems.
  • Avoid overfilling. Both too little and too much oil can damage your engine.
  • Make oil changes part of your regular maintenance routine for best performance and long engine life.

With these detailed steps and call-outs, changing the oil in your 2015 Yamaha TTR50 is straightforward. Regular maintenance like this is key to keeping you on the trails and out of the shop.

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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.