How to Change the Oil in a 1995 Suzuki RM250

Shop parts for a 1995 Suzuki RM250 Dirt Bike.

Maintaining the transmission oil in your 1995 Suzuki RM250 is vital for engine longevity and optimal performance. This guide, proprietary to MotoSport.com, details every step, highlights required tools, and explains RM250-specific details every owner should know.

Tools and Supplies Needed

  • 10mm, 12mm, and 14mm sockets or wrenches
  • Socket wrench
  • Oil drain pan
  • Measuring cup or graduated beaker (To measure new oil volume)
  • Clean rags or shop towels
  • Rubber gloves (Optional, for hand protection)
  • New transmission oil (SAE 10W-40, as recommended by Suzuki)
  • Torque wrench (Optional, but highly recommended)

RM250 Model-Specific Call-Outs

  • Oil Capacity:– For a standard oil change, refill with 750 ml (0.8 US qt or 0.7 Imp qt) of oil. After an engine overhaul, fill with 850 ml (0.9 US qt or 0.7 Imp qt)
  • Check Bolt Location:– The oil check bolt can be tricky to find. On the RM250, it's located behind the chain guard and some electrical wires on the left side. Remove the chain guard and gently move the wires to expose an Allen-head bolt - this is your oil level check bolt.
  • Recommended Oil Type:– Use SAE 10W-40 motorcycle gear/transmission oil rated with at least API SG/SH/SJ or better with JASO MA/MA2 standards.
  • Drain Plug Torque Spec:– 21 Nm (15.0 lb-ft)
  • Oil Level Check Bolt Torque Spec:– 5.5 Nm (0.55 kgf-m)

Step-by-Step Guide to Changing the Oil

  1. Warm Up the Engine
    • Start your RM250 and let it idle for about 3-5 minutes. Warm oil drains more easily and removes contaminants from the transmission.
  2. Secure the Motorcycle
    • Place the RM250 on a level surface and ensure it stands upright. Use a bike stand for best access and safety.
  3. Remove the Filler Cap
    • Locate the oil filler cap on the right side of the engine (top of the clutch cover) and remove it. This helps oil flow out freely when draining.
  4. Position the Drain Pan
    • Place the oil drain pan directly under the engine's drain plug, keeping rags handy for any spills.
  5. Remove the Drain Plug
    • Locate the oil drain plug at the bottom of the transmission case. Use the correct socket or wrench to remove the plug and let the oil drain completely.
    • Inspect the plug for any metal shavings, which could indicate engine wear.
    • After oil drains, clean the drain plug and its sealing washer.
  6. Reinstall and Torque the Drain Plug
    • Reinstall the drain plug and tighten it to the recommended 21 Nm (15.0 lb-ft) torque specification.
  7. Add New Oil
    • Pour 750 ml of the recommended 10W-40 oil into the filler opening using a graduated cup for accuracy.
    • Do not overfill, as too much oil can cause shifting issues or leaks.
  8. Check the Oil Level
    • Start the engine and idle for 1-2 minutes, then turn it off and let the bike sit for a minute.
    • Find the oil check bolt (see call-out above). Remove it using an Allen key. A small amount of oil should seep out; if not, add oil gradually until it does.
    • Reinstall and torque the check bolt to 5.5 Nm.
  9. Replace the Filler Cap
    • Ensure the filler cap is clean, then reinstall it securely.
  10. Dispose of Old Oil Properly
    • Take the used oil to a recycling center or auto parts store that handles motorcycle oil disposal.

Tips and Cautions

  • If you notice severe metal debris on the drain plug, consider a further internal inspection by a mechanic.
  • Double-check the torque of all bolts for leaks.
  • Always use the correct type and quantity of oil for optimal clutch and gear operation.

Final Inspection

  • Run the bike and observe for leaks around the drain plug and filler cap.
  • Check shifting and clutch operation; both should feel smooth post-change.
  • Repeat this process every 5-10 hours of riding, or as recommended for your specific usage.

Keeping your 1995 Suzuki RM250's oil fresh is one of the most important things you can do for bike reliability, especially during aggressive riding, racing, or trail riding. MotoSport.com brings you this expert guide so you can ride with confidence and performance.

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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.