How to Change the Oil in a 1999 Honda CR80 Big Wheel
Shop parts for a 1999 Honda CR80 Big Wheel Dirt Bike.
Welcome to MotoSport.com’s step-by-step guide on changing the oil in a 1999 Honda CR80 Big Wheel. Regular oil changes are key to maintaining optimal engine performance and prolonging the lifespan of your dirt bike. Whether you’re a seasoned mechanic or a first-time DIYer, follow this guide for safe, efficient results.
Tools and Materials Needed
- 17 mm socket or wrench (for oil drain bolt)
- Oil drain pan (to catch used oil)
- Funnel (for pouring new oil)
- Clean rags or paper towels
- New engine oil (refer to your CR80 manual; generally, high-quality 4-stroke motorcycle oil is recommended)
- Gloves (optional, for cleaner hands)
- Torque wrench (optional, for drain plug installation)
Special Call-Outs for the 1999 Honda CR80 Big Wheel
- The CR80, like many Honda small-displacement 2-stroke and 4-stroke bikes, uses an oil drain bolt instead of a replaceable oil filter cartridge. There may be a simple oil screen, but no oil filter that requires regular replacement for this model.
- You may find the recommended oil capacity stamped on the engine case or clutch cover–always verify this value before filling with new oil.
- The oil filler cap usually comes with a dipstick for checking levels. Make sure to clean around the cap thoroughly to prevent dirt from entering.
- If the drain plug is magnetic, inspect for any metal shavings as a sign of potential internal wear.
Step-by-Step Instructions
-
Warm Up the Engine
Start your CR80 and let it idle for a few minutes. Warmed oil drains more thoroughly and suspends contaminants better. -
Prepare the Work Area
Place the bike upright on a stand. Put the oil drain pan under the engine to catch the old oil. Gather all your tools and supplies within easy reach. -
Remove the Filler Cap/Dipstick
Unscrew the oil filler cap and dipstick. This releases any vacuum, letting oil drain faster and more completely.
Tip: Clean around the filler area before opening to help keep dirt out. -
Locate and Remove the Drain Plug
Find the 17 mm drain bolt underneath the engine. Use your wrench or socket to loosen and remove the bolt.
Allow the oil to drain completely into your oil pan. This may take 5–10 minutes.
Special Note: If your drain bolt has a magnet, inspect for metal shavings. A minor amount is normal, but excessive debris could signal an internal problem. -
Inspect and Reinstall the Drain Plug
Wipe the drain plug clean and inspect the sealing washer. Replace the washer if it’s damaged or crushed.
Thread the plug back in by hand to prevent cross-threading, then tighten securely. If using a torque wrench, tighten to the specified torque (the XR80, a similar Honda, uses 21 ft-lb as a guideline). Do not over-tighten. -
Add New Oil
Place a funnel in the filler opening. Pour in the recommended quantity of fresh engine oil (typically around 650–700cc for Honda 80s, but check your owner’s manual or look for a stamp on the engine case for capacity specifics).
Tip: If using a graduated mixing cup, it may only go up to 500cc–fill the remainder by topping off in increments. -
Replace Cap and Check Oil Level
Reinstall the oil filler cap and dipstick. Start the bike and let it run for a minute, then shut it off and let oil settle. Remove the dipstick, wipe clean, then reinsert and check the level. Add more oil if necessary to reach the correct level. -
Dispose of Old Oil Properly
Pour the used oil into a sealed container and take it to a recycling center or automotive shop that accepts used oil. Never pour oil onto the ground or into drains. -
Check for Leaks
After running the bike briefly, inspect the drain bolt area for oil leaks–retighten if needed.
Common Questions & CR80-Specific Advice
- Oil Type: Honda recommends a high-quality 4-stroke motorcycle oil, even though the CR80 is a 2-stroke, because its transmission shares oil for gear lubrication. Do not use automotive engine oil–use oil formulated for wet-clutch motorcycles.
- Oil Screen: The CR80 may have a fine mesh oil screen, but this is not a regular maintenance item and does not need changing during normal oil changes.
- Oil Change Interval: For hard or racing use, change oil every 5–10 hours of riding; for recreational use, every few rides or once a month.
- Overfilling/Underfilling: Both can harm your CR80. Always check the oil level after running the engine and top up as needed.
Conclusion
Changing the oil in your 1999 Honda CR80 Big Wheel is a straightforward but essential maintenance task. Following these steps keeps your transmission running smoothly and protects your bike for years of riding enjoyment.
MotoSport.com supports every rider—please reach out with questions or let us know your maintenance tips for the CR80.
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Shop Oil Fillers and Drain Plugs for a 1999 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.