How to Change the Oil in a 2021 Suzuki RM-Z250

Shop parts for a 2021 Suzuki RM-Z250 Dirt Bike.

MotoSport.com How-To Series: Suzuki RM-Z250 Oil Change Guide (2021 Model)

Tools and Supplies Needed

  • Ratchet and sockets: 8mm, 12mm, and 14mm
  • Torque wrench
  • Oil catch pan
  • New oil filter
  • New engine oil: Suzuki Performance 4 Motor Oil or equivalent with SF/SG/SH/SJ (API) and JASO MA certification, approximately 950ml if replacing filter
  • Parts cleaner (optional)
  • Rag or shop towels
  • Pick tool
  • Gloves
  • Replacement O-ring for the oil filter cap (recommended)
  • Oil filter cap bolts and TDC plug torque specs

Before You Start

  • Refer to your owner's manual for any extra model-specific notes.
  • Oil capacity for the 2021 RM-Z250 is 950ml (about 1 US quart) when changing the filter–check and top off if necessary after initial fill.
  • Suzuki recommends changing the engine oil every 6 hours of riding and the oil filter every 12 hours.

Changing the Oil: Step-by-Step

  1. Warm the Engine
    • Let your RM-Z250 idle for about 3 minutes to warm up the oil. This helps oil drain more thoroughly .
  2. Set Up Your Work Area
    • Park the bike on a level surface using a stand.
    • Lay rags around the work area to catch any spills.
  3. Remove the Drain Bolt
    • Use a 12mm socket to carefully remove the oil drain bolt located on the bottom of the engine .
    • Let the old oil fully drain into your oil catch pan.
  4. Remove and Replace the Oil Filter
    • Using an 8mm socket, remove the oil filter cover bolts.
    • Take off the cover and remove the old oil filter and spring.
    • With a pick tool, remove the old O-ring. Install a new O-ring if needed, lightly lubricating it with fresh oil before placement .
    • Apply a small amount of new oil to the filter’s gasket.
    • Install the new oil filter, spring, and cover, then torque bolts to 11 Nm (8.0 lb-ft) .
  5. Reinstall the Drain Plug
    • Check and clean the drain plug, replace the crush washer if needed.
    • Reinstall and tighten the drain plug to the manufacturer’s torque specification (consult your manual for exact value).
  6. Refill with New Oil
    • Remove the oil fill cap.
    • Pour in 950ml (about 1 US quart) of approved engine oil .
    • Replace and tighten the oil fill cap.
  7. Check Oil Level
    • Start the engine and let it run for a minute, then shut it off.
    • Wait a few minutes, then check the oil level as per the dipstick or sight glass.
    • Add oil if necessary to reach the full mark .
  8. Clean Up and Check for Leaks
    • Inspect around the drain bolt, filter cover, and fill cap for leaks.
    • Dispose of old oil and filter at a recycling center.

2021 RM-Z250 Model-Specific Notes

  • This oil change process applies to all 2019–2023 RM-Z250 models; no significant changes in procedure or requirements for 2021.
  • Torque specs are important for the oil filter cap and drain plug. Over-tightening can damage threads or crush washers.
  • The recommended oil change intervals (every 6 hours for oil, 12 for filter) are designed for high-performance use. If riding in extreme dust or racing, consider more frequent changes .
  • Always use JASO MA-certified oil for optimal clutch and engine protection.
  • If you lose track of when the last oil change was, drain color and texture can indicate need: dark, gritty, or burnt-smelling oil should always be changed.

Final Tips

  • Have extra shop towels on hand to clean surfaces and your hands.
  • Log each oil change date and operating hours to preserve engine health and value.
  • Dispose of oil and filters responsibly.

This proprietary guide is provided exclusively by MotoSport.com and is intended for informational purposes for owners of the 2021 Suzuki RM-Z250.

Related Shopping Categories

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Shop Oil Fillers and Drain Plugs for a 2021 Suzuki RM-Z250 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.