How to Change the Oil in a 2013 Suzuki RM85

Shop parts for a 2013 Suzuki RM85 Dirt Bike.

Keeping the transmission oil fresh in your 2013 Suzuki RM85 is crucial for longevity and performance. Follow this robust, step-by-step guide from MotoSport.com for a professional oil change, including model-specific tips, tool lists, and essential callouts.

Tools & Supplies Needed

  • Socket wrench set (metric, includes 17 mm for drain plug)
  • Torque wrench
  • Oil drain pan
  • Measuring cup (capable of accurately measuring 550 ml)
  • Funnel
  • Rags or shop towels
  • New transmission oil (SAE 10W-40, API SG, SH, SJ, SL, SM or SN with JASO MA/MA1/MA2)
  • Gloves and eye protection
  • Replacement washer for drain plug (optional, if necessary)

Model-Specific Oil Specs & Quantities

  • Oil type: SAE 10W-40 (SG, SH, SJ, SL, SM, or SN with JASO MA/MA1/MA2)
  • Oil quantity: 550 ml (1.2 US pints/1.0 Imp pints)
  • Oil drain plug torque: 23 N·m (16.5 lb-ft)
  • Oil level screw torque: 5.5 N·m (4.0 lb-ft)

Step-by-Step Instructions

  1. Warm Up the Engine
    • Start the engine and let it idle for a few minutes. This helps the oil flow out more freely and carries away contaminants.
  2. Stabilize the Bike
    • Place the bike on a level surface and hold it vertically using a stand.
  3. Remove the Filler Cap
    • Locate and unscrew the oil filler cap on the right side of the engine. Set the cap aside on a clean rag to prevent debris contamination.
  4. Drain the Oil
    • Position the oil drain pan beneath the engine’s drain plug (lower part of the engine, beneath the right-side crankcase).
    • Using the socket wrench, carefully remove the drain plug and allow all the old oil to drain out. Take care not to lose the washer.
    • Inspect the drained oil for metal particles or excessive discoloration, which could indicate internal wear.
  5. Inspect, Clean, and Replace the Drain Plug
    • Clean the drain plug and washer thoroughly. Replace the washer if it is worn or damaged for the best seal.
  6. Reinstall and Tighten the Drain Plug
    • Reinstall the drain plug by hand to avoid cross-threading, then tighten with a torque wrench to 23 N·m (16.5 lb-ft) as specified by Suzuki.
  7. Add New Oil
    • Place a funnel in the filler opening and pour in 550 ml of the specified transmission oil (SAE 10W-40, JASO MA/MA1/MA2). Precise measurement is critical; do not overfill or underfill.
    • Screw the filler cap back on securely.
  8. Check Oil Level
    • Run the engine for a few minutes and shut it off. Wait five minutes to let the oil settle.
    • With the bike held vertically on a level surface, remove the oil level screw. Oil should just trickle out of the hole. If not, remove the filler cap and add oil until it does. Replace and tighten both screws to proper torque specifications.
  9. Final Steps and Clean Up
    • Wipe off any spilled oil from the case and exhaust areas.
    • Dispose of the old oil responsibly by taking it to a recycling facility.
    • Double-check all fasteners for proper tightness. Clean tools and store them properly.

2013 Suzuki RM85 – Owner-Specific Callouts

  • Oil Quantity and Level: The RM85 has a low total oil capacity; always measure new oil precisely (550 ml), as overfilling can increase internal pressure and cause leaks, while underfilling risks transmission wear.
  • O-ring and Plug Washer: Always inspect O-rings and sealing washers for wear or cracks. Replace if necessary to prevent leaks.
  • Thread Care: Both the drain bolt and oil level screw require only modest torque; over-tightening can lead to stripped threads, a common pitfall with dirt bike engines.
  • Correct Oil Spec: Only use motorcycle-specific 10W-40 oil with JASO MA/MA1/MA2; never use automotive oils as clutch performance and longevity may suffer.
  • Frequency: For hard off-road or race use, Suzuki and MotoSport.com recommend checking or changing oil after every 5-10 hours of riding, or after every race.

Why Regular Oil Changes Matter

  • Old, contaminated oil accelerates gear and bearing wear, clogs passages, and may result in premature engine failure.
  • Fresh oil maintains smooth shifting and positive clutch engagement.

MotoSport.com Tech Tip

  • Track your hours with a maintenance log. Always inspect oil as you drain it; milky or metallic oil indicates bigger issues that should be addressed.
  • Consider keeping a spare plug washer and O-ring in your tool kit for race-day emergencies.

Conclusion

Changing the transmission oil in your 2013 Suzuki RM85 is a straightforward process that pays off in engine life and ride quality. Stick to the recommended intervals, use proper oil and torque specs, and you’ll keep your RM85 running at peak performance season after season.

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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.