How to Change the Oil in a 2008 Suzuki RM250

Shop parts for a 2008 Suzuki RM250 Dirt Bike.

Changing the oil in your 2008 Suzuki RM250 is essential to maintain peak engine and transmission performance. This guide, proprietary to MotoSport.com, provides all required steps, tools, and important model-specific callouts to ensure a successful oil change for your RM250 dirt bike.

Tools and Supplies Needed

  • 10mm socket or wrench (for oil drain plug)
  • Oil catch pan
  • Funnel
  • Clean rags
  • Fresh transmission oil (10W-40 recommended)
  • Torque wrench
  • Allen key (for oil check bolt)
  • Rubber gloves (optional for cleanliness)

Step-by-Step Instructions

  1. Warm Up the Engine
    • Start the bike and let it run for a few minutes to allow the oil to warm up. Warm oil drains out faster and carries more contaminants.
  2. Stabilize the Motorcycle
    • Place the RM250 on a level surface using a bike stand. Ensure it's held vertically for accurate draining and refilling.
  3. Remove the Filler Cap
    • Unscrew the oil filler cap located on the right side of the engine. This step helps the oil drain more smoothly.
  4. Drain the Old Oil
    • Locate the oil drain plug on the bottom of the engine. Position the oil catch pan directly under the plug.
    • Using a 10mm socket, loosen and remove the drain plug. Allow all of the old oil to drain completely.
    • Inspect the drain plug and its washer for wear or debris. Replace if damaged.
  5. Reinstall the Drain Plug
    • Once the oil has fully drained, reinstall the drain plug and tighten to 21 N·m (15.0 lb-ft) using a torque wrench for correct specification

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  6. Refill with New Oil
    • Using a funnel, pour in 750 ml (0.8 US qt) of 10W-40 transmission oil. This is the specified amount for the 2008 RM250 during a regular oil change

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    • Do not overfill. Overfilling can cause clutch or shifting issues.
  7. Check the Oil Level
    • This RM250 features an oil check bolt located behind the chain guard and some wiring. You will need to use an Allen key to access and remove this plug to properly check the oil level

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    • If necessary, move any obstructing wires gently out of the way to reach the oil check bolt.
    • With the bike held upright, slowly remove the oil check bolt. A small amount of oil should seep out when the level is correct. If not, add oil in small increments and recheck.
  8. Reinstall the Filler Cap and Oil Check Bolt
    • Once the oil level is confirmed, reinstall the oil check bolt and replace the chain guard or any wires as needed.
    • Securely tighten the oil filler cap.
  9. Start and Inspect
    • Start the engine and let it idle for a couple of minutes.
    • Check under the bike for leaks at the drain plug and filler cap. Inspect the oil check bolt area as well.
    • Stop the engine, wait a few minutes, and recheck the oil level as above.

Model-Specific Call-Outs: 2008 Suzuki RM250

  • Oil Capacity: Use 750 ml (0.8 US qt) of oil for a routine change. For a complete overhaul, use 850 ml (0.9 US qt)

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  • Oil Check Location: The oil check bolt is slightly hidden behind the chain guard and wires on this model–removal of the chain guard may be necessary for access

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  • Oil Recommendation: Use 10W-40 motorcycle transmission oil for optimal clutch and shifting performance

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  • Drain Plug Torque: Tighten the drain plug to the specified torque of 21 N·m (15 lb-ft) to prevent leaks and stripped threads

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Extra Tips

  • Change oil after every 5–10 hours of riding, or more frequently in harsh conditions such as sand or mud riding.
  • Always dispose of used oil properly at your local waste or recycling facility.

By following this guide, you ensure a professional-quality oil change for your 2008 Suzuki RM250, maximizing performance and engine life. Happy riding from MotoSport.com.

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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.