How to Change the Oil in a 2020 Suzuki DRZ125L: A Complete, Proprietary Guide for MotoSport.com

Shop parts for a 2020 Suzuki DRZ125L Dirt Bike.

Changing the oil in your 2020 Suzuki DRZ125L is a fundamental piece of routine maintenance that will prolong the engine’s life and help your bike perform at its best. While the process is straightforward, following each step precisely and using the correct tools is crucial. Read on for tools required, a detailed step-by-step guide, and important model-specific call-outs every DRZ125L owner needs to know.

Tools and Materials Needed

  • 10mm socket (for oil filter cover bolts)
  • 17mm socket (for drain plug removal)
  • Torque wrench (optional but recommended, set to 20.5 lb-ft for drain bolt tightening)
  • Oil drain pan
  • Funnel
  • Measuring cup or graduated container (to ensure proper oil volume)
  • Gloves (to protect your hands from oil and hot surfaces)
  • Paper towels or shop rags (for clean-up)
  • New oil filter (optional; Suzuki recommends changing it every few oil changes, but always inspect or replace if uncertain)
  • Suzuki Genuine or equivalent 10W-40 four-stroke motorcycle oil (quantity: approximately 950ml/1 US quart)

Step-by-Step Procedure

  • Warm Up the Engine
    • Start the bike and let it idle for 5–10 minutes. This allows the oil to thin and drains out more thoroughly.
  • Position the Bike
    • Place the DRZ125L securely on its side stand over a flat, level surface with enough space to work safely.
  • Remove the Oil Filler Cap
    • Unscrew the cap on the right side of the engine – let air in for smoother drainage later.
  • Drain the Oil
    • Position your drain pan directly below the oil drain plug (bottom of the engine). Use a 17mm socket to remove the plug and its gasket, then allow the oil to fully drain.
    • You may want to hold the bike vertically or as upright as possible during draining to ensure all old oil exits the crankcase.
    • Be patient – let all oil drip out. Dispose of the used oil following local environmental regulations.
  • (Optional but Recommended) Change the Oil Filter
    • Locate the oil filter cover on the right engine side. Remove the three bolts using a 10mm socket. Have your drain pan ready, as residual oil may spill when the cover comes off.
    • Take out the oil filter. Inspect the sealing surface and O-ring; clean any debris with a paper towel. Replace the filter with a new one if necessary, or reinstall the current one if it’s clean and recently changed.
    • Ensure the O-ring/seal is properly seated in the cover before reassembly. Overtightening the filter cover bolts can crack the housing; just snug them up, or use the manufacturer’s torque spec if available.
  • Reinstall the Drain Plug
    • After the flow slows to a drip, wipe the area clean and reinstall the oil drain plug with its gasket. If using a torque wrench, tighten to 20.5 lb-ft.
  • Add New Oil
    • Using a funnel, add approximately 950 ml (1 US quart) of fresh 10W-40 oil via the filler cap. Suzuki recommends their Genuine Oil or a high-quality equivalent meeting JASO MA standards.
    • Avoid overfilling – check the oil with the dipstick while the bike is vertical. Top off as needed.
  • Check for Leaks
    • Start the bike and let it idle for a few minutes. Inspect the drain plug and oil filter cover area for leaks. Shut off the engine, let the bike sit for a few minutes, then re-check the oil level and top off if required.
  • Dispose of Oil Responsibly
    • Take your old oil and filter to a certified recycling center. Never pour oil down drains or onto the ground.

Model-Specific Call-Outs for the 2020 Suzuki DRZ125L

  • Oil Volume: The 2020 DRZ125L uses approximately 950 ml (1 US quart) of oil when doing an oil and filter change. Always double-check the dipstick after re-filling and topping off.
  • Drain Plug Torque: Reinstall the drain plug to 20.5 lb-ft (about 28 Nm) to avoid stripping the sump threads or causing leaks.
  • Oil Filter Service:
    • The oil filter should be inspected with every oil change and replaced when dirty or damaged, or at intervals specified in the factory service manual.
    • The filter cover O-ring/gasket should always be inspected for nicks or flattening; replace if damaged.
  • Engine Oil: Use only 10W-40 motorcycle oil (JASO MA). Automotive oils may harm the clutch or transmission.
  • Draining Tips: Hold the bike vertical to drain oil completely; letting it tip on the stand traps oil inside the crankcase.
  • Safety Precautions: Allow the engine and exhaust to cool before starting; contact with hot oil or metal can cause burns. Wear gloves for safety, and avoid oil contact with skin as prolonged exposure can irritate or cause health issues.

Final Recommendations

  • Stay on Schedule: Regular oil changes are critical for engine life – Suzuki recommends changing the oil every 1,000–1,500 miles or after heavy rides.
  • Track Your Maintenance: Record oil change dates and intervals in a logbook for warranty and resale purposes.

Trust this proprietary guide brought to you by MotoSport.com for every oil change on your 2020 Suzuki DRZ125L, and enjoy years of reliable riding.

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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.