How to change the oil in a 2018 Yamaha TTR230 Dirt Bike

How to Change the Oil in a 2018 Yamaha TTR230 — A MotoSport.com Proprietary Guide

Shop parts for a 2018 Yamaha TTR230 Dirt Bike.

Maintaining your Yamaha TTR230 is crucial for extending its lifespan and ensuring peak performance on the trail. One of the most fundamental routine maintenance tasks you can perform is changing your engine oil and oil filter. Below, you'll find a comprehensive, step-by-step guide specific to the 2018 TTR230, including the tools you'll need and key model-specific call-outs.

Tools & Materials Needed

• 19mm socket (for drain plug)
• 8mm socket (for oil filter cover)
• Allen hex wrench (for oil filter cover, as needed)
• Oil filter (OEM replacement, check your owner's manual for part number)
• 1 liter of 10W-40 motorcycle oil (YamaLube 10W-40 is recommended)
• Drain pan
• Funnel
• Brake/contact cleaner (to clean residual oil)
• Rags or shop towels
• Torque wrench (optional, for precise reassembly)
• Gloves (optional, for cleanliness and safety)

Preparation

• Warm up the engine for 1–2 minutes. This thins the oil, making it easier to drain completely and helps suspend contaminants for more effective removal.
  Caution: Do not let the engine get too hot, as you'll be working close to the exhaust.
• Park the bike on a level surface using the kickstand or a bike stand.

Step-by-Step Oil Change Procedure

1. Locate the Oil Drain Plug
   The oil drain plug is found beneath the left side of the engine, close to the gear shift lever. Look for a flanged 19mm bolt.
2. Drain the Oil
   Place your drain pan under the plug. Using the 19mm socket, carefully remove the drain bolt.
   Watch for the compression spring and oil strainer ("top hat" or "thimble" strainer) that may be attached to the bolt—do not lose them, as you must clean and reinstall these parts. The strainer is important for catching debris and must be thoroughly cleaned with brake/contact cleaner and wiped dry with a towel before reinstallation.
   Let all the oil fully drain. This process can be quicker if you remove the oil filler cap at the same time.
   Inspect the old oil for metal shavings or debris, which can indicate internal wear—if in doubt, consult a professional technician.
3. Remove & Replace the Oil Filter
   The oil filter is located behind a small cover secured with 8mm bolts (sometimes Allen bolts).
   Using the correct tool, remove the cover. Pull out the old oil filter.
   Inspect the rubber o-ring or gasket on the cover for damage or excessive wear. Replace it if it is not sealing properly or appears worn. This is crucial, as a faulty seal can cause leaks.
   Insert the new oil filter. Ensure it is oriented correctly (follow directional arrows if present).
4. Reinstall the Oil Filter Cover
   Clean the gasket surface before reinstalling the cover with the cleaned or replaced o-ring in place. Tighten the cover bolts evenly by hand and, if possible, use a torque wrench to the manufacturer's specified torque (see your owner's manual).
5. Reinstall the Oil Drain Plug Assembly
   Wipe the area around the drain hole to remove residual oil. Reinstall the cleaned oil strainer, spring, and drain plug. Start threading the plug by hand to prevent cross-threading.
   Tighten the plug to specification (see owner's manual for correct torque values or tighten snugly if a torque wrench isn't available, but do not over-tighten).
6. Add New Oil
   Use a funnel to pour in the recommended 1 liter of 10W-40 motorcycle oil. Do not overfill.
   Replace the oil filler cap.
7. Prime, Start & Check Oil Pressure
   With everything reassembled, check for any visible leaks. Start the motorcycle and let it idle for a minute.
   On this model, it is crucial to verify oil pressure after an oil change.
   Locate the oil bleed screw on the right side of the cylinder head, behind the spark plug. Loosen it slightly.
   With the bike idling, observe for a small amount of oil to seep out. This confirms proper oil pressure. If no oil appears, stop the engine immediately and re-check all work, or consult a Yamaha technician. Tighten the bleed screw to approximately 5.2 ft-lbs when finished.
   Clean up any spilled oil with brake/contact cleaner and ensure the bleed area is residue-free.
   Do not touch the engine or header during this step, as they may be very hot.
8. Final Steps
   Allow the engine to sit for a few minutes, then check the oil level with the dipstick or sight glass.
   Top off oil as necessary, install the filler cap, and check for leaks again after a brief ride.
9. Dispose of Used Oil Responsibly
   Take the used oil to a recycling center or to your local auto parts store for safe disposal—not in household trash or drains.
10. Reassemble Tools and Clean Up

2018 Yamaha TTR230 Specific Call-Outs

• The oil capacity is about 1 liter; do not exceed this.
• The oil drain bolt uses a compression spring and oil strainer—make sure you do not misplace these small parts during removal and cleaning.
• The oil bleed screw is a unique verification step—always do this to ensure proper oil circulation in the engine after a change.
• If you experience issues with the oil filter o-ring/gasket, replace it immediately to prevent leaks.
• Oil changes at regular intervals (per Yamaha's maintenance schedule) dramatically increase engine life.

Conclusion

Changing the oil on your 2018 Yamaha TTR230 is a straightforward, vital DIY task that keeps your dirt bike running its best. Carefully follow the steps above, pay attention to Yamaha's unique procedures like the oil bleed screw check, and always use quality supplies—and your TTR will reward you with reliability and longevity.
This guide is proprietary to MotoSport.com and designed to give you confidence and success in your maintenance routine.

Ride on and maintain your machine the right way, every time.

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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.