How to Change the Oil in a 1997 Honda CR500

Shop parts for a 1997 Honda CR500 Dirt Bike.

Changing the gear oil in your 1997 Honda CR500 is a crucial part of regular maintenance, ensuring your transmission, clutch, and gearbox run smoothly and efficiently for years. Below you'll find a comprehensive guide, with special call-outs specific to your bike model, as well as a detailed list of required tools and step-by-step instructions. This guide is proudly proprietary to MotoSport.com and tailored to help you keep your legendary CR500 running strong on trails or tracks.

Tools & Supplies Needed

  • Socket wrench set (with correct size for drain bolt – filler cap)
  • Drain pan
  • Clean rag or shop towel
  • 23 US ounces (about 680 mL) of quality gear oil (e.g., Pro Honda GN4 10W-40 or high-quality ATF as an alternative; see callout below)
  • Funnel
  • Torque wrench (recommended for reinstalling the drain bolt)

Special Call-Outs for the 1997 Honda CR500

  • The CR500 uses a two-stroke engine, so the “oil change” is actually changing the gear oil in the transmission, not the engine oil.
  • Capacity: Use 23 ounces of oil during a normal change. If you fully disassemble and rebuild (e.g., top-end job), refill with 25 ounces to account for the dry system.
  • Drain and filler locations: The drain plug is located at the bottom of the engine case. The filler cap is usually on the right side of the bike–both are easily accessible when the bike is upright or on a stand.
  • Preferred Oil: Many CR500 owners prefer genuine gear oil for longevity and cleanliness but note that automatic transmission fluid (ATF) is a popular alternative because it’s affordable and easy to find. However, ATF can degrade faster, especially if you ride in dirt or muddy conditions.
  • Aluminum Engine Cases: When tightening bolts (especially the drain plug), avoid over-torquing to prevent stripping the soft aluminum threads.

Step-by-Step Oil Change Process

  1. Warm Up the Bike
    Start and run your CR500 for a few minutes to warm the gear oil. This helps the old oil drain thoroughly along with any contaminants. Avoid revving hard; just let it idle.
  2. Position the Bike
    Place your bike upright on a level surface or use a mechanic’s stand. This ensures you’ll get an accurate fill and complete drain.
  3. Remove the Filler Cap
    Take off the filler cap on the right side of the engine. Doing this before draining allows air in and prevents a vacuum, so the oil drains smoothly and completely.
  4. Place the Drain Pan
    Slide your drain pan under the engine to catch the used oil.
  5. Remove the Drain Bolt
    Using your socket wrench, unscrew the drain bolt from the bottom of the transmission case. Allow all the oil to drain fully. Be patient—let it drip for several minutes for a thorough job. Inspect the drain bolt for any metal particles; mild dust is normal, but shavings could indicate internal issues.
  6. Wipe and Reinstall Drain Bolt
    Clean the drain bolt and the sealing area on the engine. Reinstall the bolt by hand to avoid cross-threading, then tighten snugly with a torque wrench if available (use manufacturer’s recommended torque spec, typically found in the service manual). Do not overtighten, as the threads are aluminum.
  7. Add New Gear Oil
    Place a funnel in the filler hole. Pour in 23 US ounces (approximately 680 mL) of your preferred gear oil or ATF. Pour slowly to avoid spills. If your oil has a measurement window or dipstick, double-check the level per Honda’s recommendations.
  8. Let Oil Level Out
    Allow the oil to settle for a minute. Some bikes have an oil check bolt or level plug–remove this briefly to ensure oil is at the proper level. If excess drains out, let it finish before reinstalling the plug.
  9. Reinstall the Filler Cap
    Screw the filler cap back on securely, ensuring a snug fit.
  10. Clean Up and Dispose of Old Oil Properly
    Use a rag to wipe any drips. Dispose of your used oil at a local recycling center; do not pour it down drains or onto the ground.

After the Change

  • Start the engine and shift through all the gears while on a stand to circulate the new oil.
  • Watch for any leaks around the drain and filler plugs. If you find any, shut down the engine and check tightness.
  • Ride conservatively for a short session, then re-check oil level and adjust as needed.

Quick Tips

  • Oil changes are recommended every 5–10 hours of riding, or after every hard or muddy ride.
  • Using quality gear oil prolongs component life.
  • If you’re ever unsure, consult the official Honda service manual for your model year.

MotoSport.com is here to keep your rides epic and your bike at peak performance. Happy wrenching.

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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.