How to Change the Oil in a 1989 Honda CR500

Shop parts for a 1989 Honda CR500 Dirt Bike.

If you own a 1989 Honda CR500, regular oil changes are crucial for keeping your legendary two-stroke in top running condition. This guide, proprietary to MotoSport.com, will walk you through the entire oil change process—including tools required, exact steps, and vital model-specific tips for your CR500.

Tools & Supplies Needed

  • Socket set (with the correct size socket for drain and fill plugs)
  • Drain pan
  • Oil funnel
  • Clean shop rag or paper towels
  • Measuring cup (graduated in ounces for precision)
  • Honda Pro Gear oil (recommended), or quality 10W-40 or 20W-50 motorcycle engine oil
  • Replacement o-ring or washer for the fill plug (optional but recommended)
  • Rubber gloves (to keep your hands clean)
  • Torque wrench (optional; for reinstalling drain/fill plug to spec)

Step-by-Step Oil Change Instructions for the 1989 Honda CR500

  1. Warm Up the Engine
    Start your CR500 and let it idle for 2-3 minutes. This heats up the oil, helping it flow out more easily and carry away contaminants. Always do this in a well-ventilated area.
  2. Stabilize and Prep the Bike
    Place the bike on a secure stand so it's perfectly upright and level. Lay out all tools and supplies within easy reach.
  3. Remove the Oil Fill Cap
    On the right side of the engine, unscrew the oil fill cap. This prevents a vacuum from forming and allows oil to drain completely.
    Tip: Inspect the o-ring on the fill cap. Replace it if it's worn or cracked for a perfect seal next time.
    <.-- Call-out: Replacement fill plugs for 1989 models do come with new o-rings. -->
  4. Drain the Old Oil
    Position your drain pan beneath the drain bolt (bottom of the right-side engine case). Using your socket, carefully loosen and remove the drain bolt.
    Allow all oil to drain thoroughly—wait several minutes until the dripping nearly stops.
    Note: Your 1989 CR500 should take about 23 US fluid ounces for a standard oil change, or 25 ounces if the case is fully disassembled and cleaned.
  5. Inspect and Clean
    Inspect the drain bolt and its sealing washer for wear. Clean off any metal debris from the magnetic tip (if applicable). Replace the washer if damaged.
  6. Reinstall the Drain Bolt
    Hand-thread the drain bolt back in, then use your socket to tighten. Do not over-tighten—overtorquing can strip the aluminum case. If using a torque wrench, check your manual for the correct spec (usually around 7–9 ft-lbs for Honda 2-strokes).
  7. Add Fresh Oil
    Place a funnel in the fill opening. Slowly pour in 23 ounces of the recommended oil.
    • Recommended: Pro Honda Gear Oil for best clutch life and performance.
    • Alternatives: Some riders use high-quality automatic transmission fluid (ATF) for easier clutch feel, but it may get dirty faster.
    • Viscosity: Use 10W-40 oil in cooler climates and 20W-50 in hot conditions.
  8. Check Oil Level
    The CR500 uses a measured fill system—23 ounces is the spec. Optionally, check by removing the small oil check bolt (if equipped; otherwise, stick to the volume method as described).
  9. Reinstall Oil Fill Cap
    Carefully reinstall the fill cap. Make sure the o-ring is seated correctly to avoid leaks.
  10. Clean Up and Final Check
    Wipe down any spilled oil from the engine and frame. Start the engine and let it idle briefly, checking for leaks at both the drain and fill plugs.

CR500-Specific Call-Outs & Tips

  • Oil Type Matters: For the 1989 CR500, use specifically formulated motorcycle gear oil to ensure ideal clutch and transmission life. While ATF can be used in a pinch, gear oil offers better longevity and protection.
  • Oil Quantity: The CR500 takes 23 US fluid ounces (0.7 quarts) for routine changes. If the engine case is split and cleaned out completely, fill with 25 ounces to compensate for oil loss in dead spaces.
  • Replace Old Fill Plug O-Ring: It's smart to replace the fill cap o-ring periodically. Aftermarket and OEM replacements usually include a new o-ring.
  • Change Frequency: Every 2–4 rides is typical for this bike, or more often in muddy/wet conditions.
  • Over-tightening Will Damage: The engine case is aluminum—only tighten the drain and fill bolts as much as necessary to seat and seal.

Keep your 1989 Honda CR500 roaring and reliable—follow these steps for every oil change, and always use the recommended products and careful procedure. For all OEM and aftermarket maintenance parts—including drain washers, fill caps, and oil—shop with MotoSport.com for confidence and speedy delivery. Safe riding.

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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.