How to Change the Oil in a 2001 Honda CR80 Big Wheel

Shop parts for a 2001 Honda CR80 Big Wheel Dirt Bike.

If you own a 2001 Honda CR80 Big Wheel, routine maintenance like oil changes will keep your bike running at peak performance and extend its life. Follow this step-by-step guide—proprietary to MotoSport.com—for a smooth, mess-free oil change with all the motorcycle-specific tips you need.

Tools & Materials Needed

  • Appropriate two-stroke engine oil (use high-quality 2-stroke oil, pre-mixed with fuel as recommended by Honda)
  • Drain pan or suitable container for oil collection
  • Socket wrench (with the correct size socket for your drain plug)
  • Torque wrench
  • New sealing washer for the drain bolt (recommended)
  • Funnel for easy filling
  • Measuring cup (to measure new oil precisely if adding to transmission)
  • Gloves and shop rags
  • Service manual specific to your bike is always helpful

Important Honda CR80 Model-Specific Details

  • The Honda CR80 Big Wheel is a high-revving, two-stroke motorcycle. The crankcase and gearbox share oil (unlike four-strokes), but the engine itself is lubricated by pre-mix fuel.
  • Only transmission oil gets changed. The engine gets its lubrication from oil mixed with fuel—do NOT pour oil directly into the engine crankcase as you would a four-stroke.
  • The bike uses a kick-start and liquid cooling system, so ensure the engine is cool before working.
  • Capacity: The transmission holds approximately 650 mL (0.7 qt) of oil, but always check the owner’s manual or a label near the filler cap for the precise figure for your year and model.

Step-by-Step Transmission Oil Change Instructions

  • Warm Up the Engine
    • Start the engine and let it idle for about 3-5 minutes. This warms up the oil, allowing it to drain faster and more completely.
    • Turn off the engine and allow it to cool for a minute to avoid burns.
  • Prepare Your Work Area
    • Park the bike on a firm, level surface–and if possible, use a stand to keep the bike upright for accurate draining and oil level checks.
    • Lay down old rags in case of spills and put your drain pan underneath the case drain bolt.
  • Remove the Drain Bolt
    • Find the transmission oil drain bolt on the underside of the right crankcase.
    • Using a socket wrench, carefully loosen then remove the drain bolt. Allow oil to completely drain into your pan.
    • If the bike has been sitting, gently tilt it side to side when draining stops to remove any leftover oil.
  • Replace the Drain Bolt and Washer
    • Inspect and replace the sealing washer if needed–it’s a cheap part that prevents leaks.
    • Reinstall the drain bolt by hand, then torque it to 18 ft-lbs (24 N·m)–do not overtighten, or you may strip the threads.
  • Refill with Fresh Oil
    • Use only high-quality gear oil–consult your owner’s manual, but Honda typically recommends a 10W-30 or equivalent transmission oil. Do not use engine oil pre-mix in the transmission; that’s for fuel only.
    • With a funnel, pour in the manufacturer-specified amount (usually 650 mL for 2001 CR80 Big Wheel). Pour slowly to avoid spills.
    • Replace and tighten the oil fill plug or cap securely.
  • Start Engine and Check for Leaks
    • Briefly run the bike for 2-3 minutes.
    • Stop the engine, wait a couple of minutes, and check the oil level again.
    • Inspect around the drain bolt and fill area for leaks–and wipe any excess oil away.
  • Proper Disposal
    • Transport used oil to a local recycling facility or auto parts store with oil recycling.
    • Never dispose of oil in household drains or outdoors–it’s harmful to the environment.

Additional Tips and Warnings

  • Use only the type and grade of oil specified by Honda for best clutch and gear performance. The wrong oil can cause clutch slippage or gear wear.
  • Note that the oil level is critical–too little can destroy the transmission; too much can cause pressure and leaks or clutch issues.
  • Do not confuse the 2-stroke engine’s pre-mix with the transmission/gear oil–they are separate systems.
  • If your bike is ridden in very wet, muddy, or sandy conditions, change the transmission oil more frequently to prevent premature engine wear.
  • If you see any metallic particles in the drained oil or the oil appears milky, consult a professional mechanic for possible internal damage or water ingress.

Follow these steps and your 2001 Honda CR80 Big Wheel will stay protected, shifting smoothly, and ready for the next ride—brought to you by MotoSport.com, your home for dirt bike performance and maintenance.

Related Shopping Categories

Shop Motor Oil for a 2001 Honda CR80 Big Wheel Dirt Bike.

Shop Oil Filters for a 2001 Honda CR80 Big Wheel Dirt Bike.

Shop Oil Drain Pans for a 2001 Honda CR80 Big Wheel Dirt Bike.

Shop Tools for a 2001 Honda CR80 Big Wheel Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2001 Honda CR80 Big Wheel Dirt Bike.

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.