How to Change the Oil in a 2008 Yamaha XT250: The Complete MotoSport.com Guide

Shop parts for a 2008 Yamaha XT250 Dirt Bike.

Changing the oil in your 2008 Yamaha XT250 is a critical maintenance task that keeps your engine running strong, extends its life, and ensures peak performance on every ride. This MotoSport.com proprietary guide will walk you step-by-step through the process, highlighting special tips and model-specific details to make your oil change flawless every time.

Tools & Supplies Needed

  • Torque wrench
  • Socket wrench
  • Socket extension
  • 12 mm socket
  • 5 mm hex (Allen) key
  • 14 mm wrench
  • Small flathead screwdriver
  • Vice grips or pliers (for stuck bolts or filler caps)
  • Funnel
  • Gloves
  • Fluid catch pan
  • Stool or rear stand
  • 2 quarts of 10W-40 motorcycle oil (e.g., Yamaha Yamalube)
  • Oil filter (KN-140 recommended or OEM equivalent)
  • Crush washer for drain bolt
  • Replacement O-rings (optional but recommended)
  • Clean rags or shop towels

Preparation

  • Warm up the engine for a few minutes to help the oil drain easier (but not hot enough to burn yourself).
  • Put the bike on a stable stand or a rear stand to keep it upright and level. This is important for accurate oil measurement later.
  • Gather all tools and supplies within reach before starting.

Step-by-Step Oil Change Process

  1. Remove the Oil Filler Cap–
    Use your hand or, if necessary, pliers or vice grips (only if the cap is rounded off) to loosen the oil filler cap on the right side of the engine. This helps oil drain smoothly.
  2. Drain the Old Oil–
    • Place the fluid catch pan under the engine drain bolt.
    • Use a 12 mm socket to remove the drain bolt (located at the bottom left side of the engine).
    • Be careful not to lose the crush washer. If it's stuck to the engine case, gently pry it off with a flathead screwdriver.
    • Let the oil fully drain out. This may take several minutes.
  3. Remove the Old Oil Filter–
    • The oil filter is behind a cover secured by three 5 mm hex bolts on the right side of the engine.
    • Carefully remove the bolts and set them aside.
    • Pry the filter cover off gently. Be aware there are small O-rings–try not to lose them. Inspect them for wear and replace if needed.
    • Remove the old oil filter. Note its orientation; the new filter must go in the same way.
  4. Install the New Oil Filter – Refit Cover
    • Lightly oil the rubber seal of the new filter before installation.
    • Install the new filter in the same orientation as the old one.
    • Reinstall the filter cover and bolts, tightening them evenly by hand first, then snug with the wrench. Do not overtighten.
  5. Replace the Drain Bolt & Washer
    • Install a new crush washer onto the drain bolt.
    • Thread the drain bolt in by hand, then torque to the manufacturer–s specifications (typically 15 lb-ft for the XT250).
  6. Fill with Fresh Oil
    • Using a funnel, pour in about 1.2 quarts of 10W-40 Yamalube (or your preferred high-quality motorcycle oil).
    • Wait a minute for the oil to settle, then check the oil level using the sight glass with the bike upright and level.
    • Add oil in small amounts as needed. The total capacity is about 1.3 quarts with filter replacement, but always fill to the correct level, not just by quantity.
    • Replace the oil filler cap securely.
  7. Check for Leaks and Final Oil Level
    • Start the engine and let it idle for a minute. Turn it off and wait a minute for the oil to settle.
    • Check the oil level again with the sight glass. Top off if necessary. Do not overfill.
    • Inspect around the drain bolt and oil filter cover for leaks.
  8. Cleanup & Proper Disposal
    • Wipe up any spills and clean your tools.
    • Take the used oil and filter to a recycling facility—never dump oil outdoors.

Critical XT250-Specific Call-Outs

  • Crush Washer: Replace every oil change to avoid leaks. They are prone to sticking to the engine case—always double-check when removing the bolt.
  • O-Rings: There are usually two O-rings for the oil filter cover. If they look worn or flattened, replace them to prevent seepage.
  • Sight Glass: Always check oil level with the bike upright and level. Ask a friend for help or use a secure bike stand. Overfilling or underfilling can harm your engine–s performance and longevity.
  • Oil Type: Do not use oil with high detergent/additive content or "energy conserving" car oils. Use only motorcycle oil to avoid clutch slippage and mechanical wear.

Recommended Oil Change Intervals

  • Engine Oil: Every 3,000 miles or annually (whichever comes first)
  • Oil Filter: Every 6,000 miles or every second oil change

Final Pro Tips

  • Always double-check for leaks after your first short ride post-change.
  • Record the mileage and date of each oil change in a maintenance log.
  • If your engine or drain bolts look stripped or damaged, replace them right away.

Changing your 2008 Yamaha XT250's oil is straightforward with preparation and the right tools. For all your maintenance needs, trust MotoSport.com for OEM parts, tools, and expert advice.

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Shop Oil Fillers and Drain Plugs for a 2008 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.