How to Change the Oil in a 2018 Yamaha XT250: The Definitive MotoSport.com Guide

Shop parts for a 2018 Yamaha XT250 Dirt Bike.

Regular oil changes are crucial for maintaining the peak performance and longevity of your 2018 Yamaha XT250. Follow this detailed, model-specific guide for a professional result, whether you're hitting dirt trails or cruising city streets.

Tools & Supplies You'll Need

  • Socket wrench with 17mm socket (for oil drain bolt)
  • Socket wrench or Phillips screwdriver (for oil filter cover screws)
  • Torque wrench
  • Oil catch pan
  • Rags for cleaning spills
  • New crush washer for drain bolt
  • OEM or aftermarket oil filter
  • Engine oil (Yamaha Yamalube 10W-40 or equivalent, JASO MA certified; 1.37 quarts for oil and filter change, 1.27 quarts for just oil change)
  • Funnel (recommended for controlled pouring)
  • Gloves (optional but recommended)
  • Stand or helper to keep the bike level

Step-by-Step Instructions

1. Warm Up the Engine

  • Start the XT250 and let it idle for 3-5 minutes. Warmed oil drains more easily and completely.

2. Position the Bike

  • Switch the engine off. Secure the XT250 upright with a stand, or ask someone to assist. A level bike ensures accurate oil draining and refilling.

3. Remove the Oil Drain Bolt

  • Locate the oil drain bolt under the engine.
  • Place your oil catch pan underneath.
  • Use your 17mm socket wrench to remove the bolt, being careful of hot oil. Let the oil drain fully (this could take 5-10 minutes).
  • Remove the old crush washer from the bolt–always replace it for a secure seal and to prevent leaks.

4. Remove and Replace the Oil Filter

  • The oil filter is located on the right side behind a small round cover secured by three bolts.
  • Remove the bolts; note that the top right screw is longer. Make sure each goes back in its correct position on reassembly.
  • Take off the cover and pull out the old oil filter.
  • Important Model Call-out: The Yamaha XT250 uses two o-rings behind the oil filter cover; inspect and replace these o-rings if they appear damaged or worn. Incorrect orientation or reusing damaged o-rings can cause leaks specific to this model.
  • Install the new filter with the correct orientation. Usually, the open side faces outward, but check your new filter's markings as a few aftermarket filters may differ.

5. Reinstall the Oil Filter Cover

  • Wipe the cover clean. Install new o-rings if required.
  • Reinstall the cover. The long screw goes in the top right hole–as unique to the XT250–and two shorter screws in the other spots.
  • Tighten them evenly to 7.2 ft-lb (10 Nm) of torque. This specific torque value is vital to avoid stripping threads on the lightweight engine case.

6. Reinstall the Oil Drain Bolt

  • With all oil drained, wipe the area clean and install the drain bolt with a new crush washer.
  • Torque the bolt to 15 ft-lb (20 Nm).

7. Add New Engine Oil

  • Remove the oil fill cap on the right side of the engine.
  • Using a funnel, pour in:
    • 1.37 quarts (1.3 liters) if you changed the oil filter
    • 1.27 quarts (1.2 liters) if you did not change the filter
  • Pour slowly to avoid overfilling.

8. Start the Engine & Check Oil Level

  • With the bike level, run the engine for a few minutes. This circulates fresh oil through the filter.
  • Turn the engine off and wait 1-2 minutes to allow oil to settle.
  • Check the oil level via the sight glass on the right side. The level should be between the upper and lower marks. Proper checking requires the bike held upright, not on the kickstand.
  • If needed, top up oil in small increments. Do not overfill.
  • Reinstall oil fill cap securely.

9. Final Checks & Cleanup

  • Inspect around the drain plug and oil filter cover for leaks while the engine runs briefly.
  • Dispose of old oil and the filter responsibly — your local MotoSport.com dealer or auto shop may accept oil waste.

Specific Notes for 2018 Yamaha XT250 Owners

  • The XT250 clutch shares engine oil, so always use JASO MA-rated motorcycle oil to prevent clutch slip and damage.
  • O-ring and crush washer replacement is highly recommended each oil change to prevent common leaks on this model.
  • Accurate oil level checking on the XT250 requires the bike to be fully upright and level; using the kickstand gives a false low reading.
  • Be careful with the filter cover bolts–over-torquing can easily strip threads on the XT250's soft aluminum engine casing.
  • Keep a log of oil changes with mileage–this helps track maintenance and resale value.

Recommended Service Intervals

  • Yamaha recommends oil and filter replacement every 3,000 miles or annually, whichever comes first. Heavy off-road use may require more frequent changes.

Why Use Yamaha Yamalube?

  • Yamalube is formulated for the unique heat and shear demands of Yamaha engines, ensuring maximum engine protection and clutch performance.
  • Using the correct oil also helps maintain warranty coverage.

Conclusion

Oil changes on the 2018 Yamaha XT250 are straightforward and essential. Always keep a close eye on oil quality and level, use genuine or reputable aftermarket parts, and enjoy knowing your bike is ready for the next adventure — courtesy of MotoSport.com.

Related Shopping Categories

Shop Motor Oil for a 2018 Yamaha XT250 Dirt Bike.

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Shop Oil Drain Pans for a 2018 Yamaha XT250 Dirt Bike.

Shop Tools for a 2018 Yamaha XT250 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2018 Yamaha XT250 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.