How to Change the Coolant in a 1996 Honda CR80 Big Wheel

Shop parts for a 1996 Honda CR80RB Dirt Bike.

Changing the coolant on your 1996 Honda CR80 Big Wheel is essential routine maintenance, necessary to keep the engine efficiently cooled and protected from overheating and corrosion. Follow this MotoSport-exclusive guide to ensure your CR80RB remains ready for every track and trail session.

Tools & Supplies Needed

  • Metric socket or wrench set
  • Drain pan
  • Funnel
  • Pre-mixed motorcycle coolant or concentrate & distilled water (never use tap water)
  • Fresh sealing washer (recommended for drain bolt)
  • Clean rags
  • Protective gloves

Preparation

  • Cool the engine completely before working on the cooling system–opening a hot system can cause scalding injuries and spray coolant.
  • Set the bike upright on a stand for easy access to both the radiator and drain bolt.

Step-by-Step Coolant Change Process

  1. Remove the radiator cap.
    • Locate the radiator cap on the right side, under the front shroud.
    • Twist the cap off slowly to release any residual pressure.
  2. Position a drain pan.
    • Place the drain pan directly beneath the water pump housing or lowest point of the radiator.
  3. Remove the drain bolt.
    • On the 1996 Honda CR80RB, the coolant drain bolt is at the bottom of the water pump cover (right side of the engine).
    • Undo the bolt and let old coolant flow out completely. Inspect the old sealing washer and replace with a fresh one if available.
  4. Drain the overflow reservoir (if equipped).
    • Disconnect and empty the overflow/expansion tank. If the tank appears dirty, rinse it thoroughly with distilled water before refitting.
  5. Inspect hoses and radiator.
    • While the system is empty, squeeze the radiator hoses to check for brittleness, cracking, or chafing. Confirm hose clamps are tight.
    • Straighten any bent cooling fins gently with a small screwdriver to maintain optimal airflow.
  6. Reinstall the drain bolt.
    • Securely reinstall the drain bolt and new washer (if used) to prevent leaks.
  7. Refill with coolant.
    • Pour the recommended pre-mixed motorcycle coolant (or a 50/50 solution of concentrate and distilled water) into the radiator slowly until it reaches the filler neck.
  8. "Burp" the system.
    • With the radiator cap off, start the engine and let it idle for several minutes. Blip the throttle a few times and gently rock the bike to free any air bubbles.
    • Top off the radiator as needed and fill the overflow reservoir to the FULL line.
  9. Reinstall the radiator cap and confirm no leaks.

MotoSport Pro Tips for CR80RB Owners

  • The 1996 Honda CR80 Big Wheel features a high-revving, liquid-cooled two-stroke engine designed for aggressive youth and lighter adult riders. Its compact cooling system means it can warm up and cool down quickly–making routine maintenance crucial for preventing overheating.
  • Always use coolant designed for aluminum radiators to avoid internal corrosion and electrolysis.
  • Given the age of the model, inspect plastic reservoir tanks and all hoses for hardening or cracking–replace if any defects are found.

Environmental & Safety Notes

  • Coolant is toxic–never pour it down drains or onto the ground. Dispose of used coolant at an automotive recycling center.
  • Keep pets and children away from draining coolant. Spilled coolant has a sweet scent but is hazardous if ingested.

With regular coolant changes following this MotoSport guide, your 1996 Honda CR80 Big Wheel will stay reliable, protecting the powerful two-stroke engine through all conditions.

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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.