How to Change the Oil in a 2013 Suzuki RM85L – The Complete MotoSport.com Owner’s Guide

Shop parts for a 2013 Suzuki RM85L Dirt Bike.

Regular oil changes are essential for maintaining peak performance and longevity in your 2013 Suzuki RM85L. This step-by-step guide is tailored specifically for this dirt bike model, outlining the required tools, precise procedure, and key tips to prevent costly mistakes. Follow these instructions to keep your RM85L running strong on any track or trail.

Tools & Supplies Needed

  • 10mm/12mm socket or box-end wrench (for drain and filler plugs)
  • Torque wrench (capable of 5.5 N·m and 23 N·m settings)
  • Oil catch pan
  • Measuring cup (capacity for 550 ml)
  • Fresh transmission oil (SAE 10W-40, API SG/SH/SJ/SL/SM/SN with JASO MA/MA1/MA2)
  • Shop rags/paper towels (for spills and wiping down components)
  • Funnel (optional, but helpful for pouring)
  • Gloves (recommended for cleaner hands)

Step-By-Step Oil Change Procedure

  1. Warm Up the Engine
    Start the bike and let it idle for a few minutes. Warm oil drains more effectively and removes more contaminants.
    Tip: Do not let the engine get too hot. A few minutes is sufficient.
  2. Secure the Bike
    Place your RM85L on a level surface using a stand. Ensure the motorcycle is held vertically. This guarantees a complete oil drain and accurate refilling.
  3. Remove the Filler Cap
    Locate the oil filler cap on the right side of the engine and remove it. This allows oil to drain more freely.
  4. Drain the Old Oil
    Position an oil catch pan beneath the drain bolt. Using your socket wrench, remove the oil drain plug located at the bottom of the crankcase. Allow the oil to drain completely.
    Important call-out: For 2013 RM85L, the oil drain plug should be torqued to 23 N·m (16.5 lb-ft) upon reinstallation. Ensure the drain plug’s O-ring is intact and not damaged.
    If you do not have a service manual handy, note that the plug is steel and can strip the threads if overtightened, so always use a torque wrench for accuracy.
  5. Inspect & Clean
    Check the removed drain plug for any metal shavings or debris which could signal internal engine wear. Wipe the plug clean and prepare for reinstallation.
  6. Reinstall Drain Plug
    Once the oil has stopped dripping, reinstall the drain plug and tighten it to 23 N·m (16.5 lb-ft) as specified for the RM85L. Over-tightening can damage the crankcase threads.
  7. Add Fresh Oil
    Using a measuring cup, pour 550 ml (1.2 US pt, 1.0 Imp pt) of recommended 10W-40 oil into the filler hole. Use a funnel if needed. Avoid overfilling; check the manual for oil capacity if in doubt.
  8. Replace the Filler Cap
    Refit the oil filler cap securely.
  9. Check Oil Level
    Start the engine and let it run for one to two minutes, then stop it and allow it to settle for a couple of minutes. With the bike vertical, remove the oil level check screw (located near the filler cap). If oil gently seeps out, the level is correct. If not, add oil slowly until it does.
    Note: The oil level screw for the 2013 RM85L should be torqued to 5.5 N·m (4.0 lb-ft).
  10. Final Inspection
    Wipe any spillage, check for leaks around both the drain plug and filler cap, and recheck torque on all fasteners. Dispose of the old oil properly.

Model-Specific Call-Outs for the 2013 Suzuki RM85L

  • The specified oil type is SAE 10W-40, API SG/SH/SJ/SL/SM or SN, with JASO MA/MA1/MA2 certification–do not use automotive-only oils or “friction modified” types.
  • Oil volume is 550 ml exactly on this model. Overfilling can cause clutch drag; underfilling can cause excessive wear.
  • The oil level check screw is a key feature—always verify level after filling using this method, not just by measurement alone.
  • Use only the recommended torque for plugs and screws to avoid damage to the aluminum cases on the RM85L.
  • Always check that the O-ring on the filler cap is in place and in good condition to prevent leaks.
  • If the oil appears milky, check for coolant contamination—a common issue on high-revving two-strokes.

Extra Tips for Owners

  • Change oil after every three to five rides, or sooner if riding in muddy or wet conditions.
  • If learning to wrench, always use a service stand for safety and stability.
  • Always use the correct oil and volume—this is especially critical on small-bore two-strokes like the RM85L.
  • Keep old oil for proper disposal at a local recycling center.

Following this guide ensures your 2013 Suzuki RM85L stays in top shape for every ride. For certified oils, OEM parts, or expert support, shop at MotoSport.com—your trusted source for dirt bike passion.

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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.