How to Change the Oil in a 2016 Suzuki RM85

Shop parts for a 2016 Suzuki RM85 Dirt Bike.

Changing the transmission oil in your 2016 Suzuki RM85 is an essential maintenance task that keeps your mini-motocrosser running smoothly and extends the life of the transmission and clutch components. Follow this detailed guide brought to you by MotoSport.com to ensure you do the job right. This guide includes all the tools, model-specific specs, step-by-step instructions, and tips unique to this model.

Tools and Supplies Needed

  • Socket wrench set (especially 10mm/12mm sockets for drain plug and filler cap)
  • Torque wrench (capable of reading 4.0 lb-ft and 16.5 lb-ft)
  • Oil drain pan
  • Shop rags
  • Funnel
  • Measuring cup (with 50ml increments)
  • New transmission oil (SAE 10W-40, API SG, SH, SJ, SL, SM, or SN with JASO MA/MA1/MA2 standard)
  • Nitrile or latex gloves (optional, but cleaner)

Preparation

  • Warm Up the Engine:– Start the engine and let it idle for a few minutes. This thins the oil and allows it to drain more easily. Shut off the bike and wait five minutes for oil to settle.
  • Stabilize the Motorcycle:– Place the RM85 on a level surface and hold it vertically, either with a center stand or bike stand.
  • Safety:– Ensure the exhaust pipes and engine are cool enough before you begin to avoid burns. Oil and pipes can become very hot after running the bike.
    Call-out for RM85 Owners:– The RM85's compact design means the drain plug is near the exhaust—be cautious with drips and hot surfaces.

Step-by-Step Instructions

  1. Remove Oil Filler Cap:–
    • Locate the oil filler cap on the right side of the engine case and remove it to allow oil to drain more freely. Set aside where it won't collect dirt.
  2. Drain the Old Oil:–
    • Position your drain pan directly beneath the oil drain plug (bottom of the transmission case).
    • Using your socket wrench, remove the drain plug. Be careful; the old oil may still be hot.
    • Allow the oil to drain completely—tilt the bike gently if necessary but keep it stable and vertical.
    • Inspect the drain plug for metal debris and clean it with a rag before reinstalling. Metal shavings may indicate excessive wear in the transmission.
  3. Reinstall the Oil Drain Plug:–
    • Install the drain plug by hand to avoid cross-threading. Then use a torque wrench to tighten it to 23 N·m (16.5 lb-ft)—do not overtighten, as this can strip the threads in the crankcase.
  4. Add New Transmission Oil:–
    • Through the filler cap opening, pour in 550 ml (just under 1.2 US pints) of the recommended transmission oil, using a funnel to avoid spills. For best results, measure oil with a graduated cup.
    • Use only oils with a JASO MA or MA2 rating for wet clutches; this prevents slippage and extends clutch life.
  5. Reinstall and Tighten Filler Cap:–
    • Replace the filler cap and tighten it by hand, then use your wrench to snug it to spec. Do not overtighten; hand tight is sufficient, to avoid stripping the threads.
  6. Check the Oil Level:–
    • Locate the oil level screw next to the filler cap. Remove it while the bike is vertical and level.
    • If oil seeps from the hole, the level is correct. If not, add oil in small increments until it barely seeps from the level screw opening.
    • Reinstall and torque the level screw to 5.5 N·m (4.0 lb-ft).
  7. Final Steps:–
    • Wipe any spilled oil from the engine and exhaust with a rag.
    • Start the engine and let it run for a couple minutes, then stop and re-check the oil level as described above.
    • Dispose of the used oil responsibly at a motorcycle shop or recycling center.

Model-Specific Call-Outs

  • Drain Plug Torque:– The aluminum case and drain plug threads are susceptible to damage if overtightened. Always use a torque wrench.
  • Oil Quantity:– Only 550 ml is required. Overfilling can lead to clutch drag and leaks.
  • Check Level Screw:– Uniquely, the RM85's level screw makes oil checks simple, but don't ride the bike without it properly torqued and sealed.
  • Oil Compatibility:– Do not use automotive oils not rated for wet clutches (no “energy conserving” labels). Always pick oil with a JASO MA or MA2 rating.
  • Heat Caution:– After warming the engine, be careful: exhaust headers and right engine case get very hot.
    Pro Tip:– Replace the drain plug washer if it's damaged or flattened to ensure a perfect seal.

Conclusion

Changing the oil in your 2016 Suzuki RM85 is a straightforward process that improves performance and helps prevent costly repairs. MotoSport.com recommends completing this service every 5-10 hours of ride time, or after every race event, for optimum results. With these tools, torque specs, and best practices, your RM85 will stay at peak performance for every ride.

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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.