How to Change the Oil in a 2009 Suzuki RM85

Shop parts for a 2009 Suzuki RM85 Dirt Bike.

Changing the oil in your 2009 Suzuki RM85 is a crucial maintenance task that ensures smooth operation and extended life for your dirt bike's transmission. Below is a detailed, proprietary step-by-step guide created for MotoSport.com, including the necessary tools, specific oil type and capacity, and special considerations unique to this year and model.

Tools and Materials Needed

  • Socket wrench set
  • Drain pan
  • Measuring cup or graduated oil jug
  • Shop rags
  • Funnel
  • New transmission oil (SAE 10W-40, API SF/SG or SH/SJ with JASO MA rating)
  • Torque wrench (for proper tightening of drain and fill plugs)
  • Gloves (optional but recommended)

Important Specifications for the 2009 Suzuki RM85

  • Oil change quantity:– 550 ml (1.2 US pt)
  • Recommended oil type:– SAE 10W-40, API SF/SG or SH/SJ with JASO MA rating

Note:– The 2009 RM85 is a two-stroke bike. The engine uses pre-mix for combustion and requires separate oil for the transmission. This guide covers the transmission oil change, not the premix.

Step-by-Step Oil Change Procedure

  1. Warm Up the Engine
    • Start your RM85 and let it run for about 2-3 minutes. This helps thin the oil so it drains more completely. Warm oil also carries more contaminants out.
  2. Stabilize the Bike
    • Position the motorcycle on a level surface and, if available, use a stand to hold the bike vertically upright. This ensures accurate oil draining and refilling.
  3. Find and Remove the Drain Plug
    • Locate the transmission oil drain plug beneath the engine; it's typically on the lower right-hand side.
    • Place your drain pan under the plug.
    • Use a socket wrench to carefully remove the plug. Allow all oil to drain completely into the pan.
    • Inspect the drain plug for any metal shavings or debris. Wipe it clean and check the sealing washer or O-ring–replace if damaged.
  4. Replace the Drain Plug
    • Once the oil has fully drained, reinstall the drain plug by hand first to avoid cross-threading. Use a torque wrench to tighten it to the specified torque (check your service manual for exact spec;–the plug should be snug but not overtightened).
  5. Remove the Filler Plug
    • The filler cap is on the right side of the engine. Remove it and set it aside.
    • Check the condition of the O-ring on the filler cap and replace if worn or damaged.
  6. Add New Transmission Oil
    • With a clean funnel, pour exactly 550 ml (about 1.2 US pints) of the specified oil into the filler hole. Do not overfill–excess oil can cause seal leaks or increased clutch drag.
    • Let the oil settle for a moment before checking the level if your model has a sight glass or dipstick.
  7. Reinstall Filler Plug
    • Secure the filler plug. Tighten by hand, then give a final snug with the wrench, but avoid overtightening.
  8. Check for Leaks
    • Start the engine and let it idle for a minute.
    • Inspect around the drain and fill plugs for any signs of leaks. If a leak is found, shut off the engine and correct immediately.
  9. Properly Dispose of Used Oil
    • Pour the old transmission oil into a sealable container and take it to an appropriate recycling center. Never pour it on the ground or throw it in the trash.

Special Model-Specific Call Outs

  • The 2009 Suzuki RM85 requires precision in oil measurement. Overfilling can cause clutch drag; underfilling can damage gears.
  • Always use transmission-specific oil, not pre-mix or generic four-stroke motor oil.
  • Be cautious of the drain and fill plug threads—they are soft aluminum and can be easily stripped. Always start threading by hand first and avoid excessive force.
  • Transmission oil must be changed more frequently if you ride in wet or sandy conditions.

Conclusion

By following this step-by-step guide and using the specified tools and oil, you'll keep your 2009 Suzuki RM85 running at peak performance. Regular oil changes protect your clutch and gears from premature wear and keep every ride smooth and worry-free.

For quality parts, fluids, and more model-specific tips, always visit MotoSport.com.

Related Shopping Categories

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Shop Oil Fillers and Drain Plugs for a 2009 Suzuki RM85 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.