How to Change the Oil in a 1980 Suzuki RM60

Shop parts for a 1980 Suzuki RM60 Dirt Bike.

Changing the transmission oil in your 1980 Suzuki RM60 is a vital maintenance task that helps ensure the longevity and smooth operation of your classic two-stroke dirt bike. This step-by-step guide is written exclusively for MotoSport.com customers and covers every detail, tool, and Suzuki RM60-specific call-out you’ll need for a professional result.

Tools and Materials Needed

  • 10mm and 12mm sockets or wrench (for clutch and drain bolts)
  • Oil drain pan or container
  • Clean funnel
  • Rags or shop towels
  • Fresh transmission oil: SAE 10W-40 for 2-stroke transmissions
  • Service manual or specifications sheet (recommended for vintage models)
  • Optional: New crush washer for the drain bolt
  • Gloves (to keep hands clean)

Step-by-Step Oil Change Instructions

  • Prepare the Bike:
    • Start the bike and let it idle for 2-3 minutes to warm up the oil. Warm oil drains faster and more completely.
    • Turn off the engine and place the bike securely on a stand or level ground to keep it upright.
  • Locate the Drain Plug:
    • Find the oil drain plug under the engine cases, typically on the lower right side. Refer to your owner’s manual or the factory service manual if needed, as the RM60 is a vintage model and exact plug placement matters.
  • Drain the Old Oil:
    • Put the oil drain pan beneath the drain bolt. Using your socket wrench, carefully loosen and remove the drain plug. Be mindful that oil may gush out quickly.
    • Allow all the old oil to completely drain–tilting the bike very slightly can help flush out excess, but avoid excessive leaning to prevent spills.
    • Inspect the drained oil for metal shavings or debris, which could indicate internal wear or issues.
  • Remove the Filler Cap and Check for Cleanliness:
    • Unscrew the oil filler cap, usually located on the right side engine cover. This step allows the system to vent and drain more thoroughly.
    • Double-check the filler neck and plug for any contamination. Wipe clean if needed.
  • Replace Oil Drain Plug:
    • Clean the drain plug and install a new crush washer if available for best results.
    • Hand-thread the plug back in, then torque to factory spec (consult your manual, but typically around 7-9 ft-lbs for this era Suzuki). Do not overtighten, as these vintage cases are soft aluminum and can strip easily.
  • Add New Oil:
    • Using a funnel, pour fresh SAE 10W-40 transmission oil into the fill port. The 1980 Suzuki RM60 takes approximately 600ml (about 0.6L) of oil, but always confirm with your manual or OEM spec sheet. Never overfill.
    • Wait a minute for the oil to settle, then check the oil level. On many RM models, there’s a sight glass or check screw–if present, open the check screw until oil just begins to drip out, then tighten back up.
  • Reinstall the Filler Cap:
    • Screw the oil fill cap back on, ensuring a secure and oil-tight fit.
  • Final Checks:
    • Start the engine and let idle for a minute. Check for any leaks around the drain plug and fill cap.
    • Shut off the engine and inspect oil level once more, topping off as needed.
    • Dispose of old oil responsibly—most automotive retailers and service shops will recycle used oil.

Model-Specific RM60 Call-Outs

  • No oil filter: The 1980 RM60 does not have an oil filter like four-stroke or bigger bikes, making changes simple but important—dirty or old oil will quickly accelerate wear on clutch and gears.
  • Watch for plug fouling: If your RM60 is fouling spark plugs with oily residue, you may have an overfilled transmission, a bad crank seal, or improper premix ratio in the fuel. Consistent fresh oil changes may help diagnose if the issue resolves or continues .
  • Crush washer condition: With vintage Japanese dirt bikes like the RM60, the soft alloy crush washer on the drain plug can deform or become brittle with age. Replace with each change if possible to avoid leaks.
  • Oil type: Only use oil specifically labeled for 2-stroke transmission/gear use–do not use motor oil intended for four-strokes, as it may impact clutch feel and transmission life.

Additional Tips for Maintaining Your Classic 1980 Suzuki RM60

  • Always use fresh, high-quality oil. Classics like the RM60 are more sensitive to dirty or degraded oil.
  • Inspect for leaks during and after each ride–aging seals are common in bikes of this era and can turn into larger problems quickly.
  • If your bike sits for long stretches, change the oil before and after storage to avoid condensation and corrosion inside the case.

With a little attention, the right tools, and regular oil changes, your 1980 Suzuki RM60 will keep running strong on the track or trail. Keep it classic—keep it MotoSport.com.

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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.