How to Change the Oil in a 1987 Yamaha XT600: The Complete Owner’s Guide

Shop parts for a 1987 Yamaha XT600 Dirt Bike.

Performing regular oil changes on your 1987 Yamaha XT600 is crucial for maintaining engine health and maximizing performance. This guide, exclusive to MotoSport.com, provides everything you need to know—including required tools, every step, and specific callouts for your vintage dirt bike.

Tools and Materials Needed

  • Sockets and a ratchet set (10mm, 12mm, 17mm sizes recommended)
  • Torque wrench
  • Oil catch pan
  • Funnel
  • Clean rags or shop towels
  • Rubber gloves (optional, but recommended)
  • New oil filter (Yamaha OEM part: 4X7-13440-90-00, or equivalent)
  • Crush washer/sealing ring for drain plug (14 x 20 x 1.5mm recommended for 1987 XT600)
  • Correct oil: Motul 3000 4T 20W-50 mineral, or Yamaha-recommended 20W-50
  • 1.0-2.8 quarts (Check owner’s manual for capacity; many XT600s use approximately 2.8 quarts/2.6 liters)

Preparation and Safety

  • Warm the engine for 3–5 minutes to help the oil drain more freely, but turn it off before starting work.
  • Place the bike on a stable center stand or paddock stand.
  • If the XT600 has a frame-mounted oil tank (dry sump), note you must drain both the crankcase and oil tank bolts—don’t skip this step.

Step-by-Step Instructions

  1. Access the Drain Plugs
    • On the 1987 XT600, the engine may use a dry sump system. Locate both the main crankcase drain plug (under the engine) and the oil tank drain plug (often on the right side, low on the downtube near the frame or oil reservoir).
    • Remove any skid plate or plastic cover to reach the drain(s), if fitted.
  2. Drain Old Oil
    • With your catch pan in place, remove the oil filler cap (usually on the right side of the cylinder head). This allows air in and helps the oil drain smoothly.
    • Use a wrench to remove the crankcase drain plug and let oil flow completely into the pan. Repeat with the oil tank drain plug if present.
    • Clean both drain plugs. Inspect and replace the crush washer/sealing ring to prevent leaks.
  3. Change the Oil Filter
    • Locate the round cover (usually held with three bolts) on the right side of the engine.
    • Remove the bolts and gently pull off the cover. Some oil may spill; use rags as needed.
    • Take out the old oil filter. Inspect the rubber o-ring or gasket and replace if worn.
    • Install the new filter, matching orientation to the old one (check which side faces outward).
  4. Reinstall Plugs and Filter Cover
    • Reinstall both drain plugs with new sealing rings. Start by hand, then torque to the recommended values: 22 ft-lbs (30 Nm) for drain plug; 5.1 ft-lbs (7 Nm) for oil filter cover bolts.
    • Do not overtighten—the XT600’s aluminum threads can strip easily.
    • Reattach any covers or skid plates you removed.
  5. Add New Oil
    • Using a funnel, pour in new 20W-50 motorcycle oil. For the 1987 XT600, the oil fill is approx. 2.8 quarts (2.6 liters) total, but add about 2.5 quarts (2.3 liters), check, and top up as needed.
    • Replace the oil filler cap securely.
  6. Check Level and Inspect for Leaks
    • Start the engine and let it idle for 30–60 seconds.
    • Shut off, wait a minute, then use the dipstick or sight glass to verify oil is in the correct range (add more if needed).
    • Check under the bike and the filter cover for leaks. Tighten fasteners gently if leaks are present.

Model-Specific Call-Outs for the 1987 XT600

  • The dry sump oiling system means oil is stored in a remote tank/frame, NOT the engine base. Always drain both crankcase and tank or the oil change is incomplete.
  • The XT600’s filter orientation matters—install it exactly as the old one; some aftermarket filters will have a different orientation—consult their instructions if unsure.
  • Threaded holes in engine cases are soft aluminum: Use a torque wrench and do not overtighten. Stripped threads on these bikes are common with over-torqued bolts.
  • The oil capacity may vary slightly depending on oil cooler options or previous owner modifications. Always use the dipstick for final verification.
  • If you notice ANY metallic particles or sludge in old oil, inspect further. The XT600 engine shares oil with the transmission and clutch; heavy deposits can indicate wear.
  • If your XT600 has a steel braided oil-cooler line retrofit, check all fittings for leaks at every oil change.

Expert Tips

  • Use motorcycle-specific oil—automotive oil lacks additives for your wet clutch.
  • Run the engine briefly after the change, let sit a minute, and check/adjust oil level once more before your first ride.
  • Dispose of old oil and filter responsibly; local auto parts stores or service centers usually accept used oil for recycling.

MotoSport.com has all the genuine Yamaha parts and top-quality oils you need for your classic 1987 XT600. Proper care ensures your legendary XT engine keeps running strong for years to come.

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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.