How to Change the Oil on a 2007 Honda CR85 Big Wheel
Shop parts for a 2007 Honda CR85 Big Wheel Dirt Bike.
Changing the engine oil on your 2007 Honda CR85 Big Wheel is a crucial maintenance task that keeps your bike running smoothly and extends engine life. Follow this comprehensive, step-by-step guide tailored specifically for the Honda CR85 Big Wheel. This guide is proprietary to MotoSport.com and highlights must-know details unique to your model year and configuration.
Tools and Materials Needed
- Metric socket set (especially an appropriate-size socket for the drain bolt)
- Torque wrench
- Drain pan
- Funnel (narrow tip or cut to fit small fill hole)
- Measuring cup (with cc or ml scale, e.g., Maxima mixing cup)
- Shop rags
- Replacement crush washer (optional but recommended)
- Fresh transmission oil (check owner's manual for type and volume, generally 600 mL)
- Screwdriver set (for removing covers if necessary)
- Gloves (recommended)
Step-by-Step Instructions
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Warm Up the Engine
- Start the bike and let it run for about 3-5 minutes. This warms the oil, helping it to drain more efficiently.
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Secure the Bike
- Place the CR85 Big Wheel on a stable stand to keep it upright and level during the oil change.
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Locate and Remove the Drain Plug
- The drain plug is located at the base of the engine case. Position your drain pan directly underneath.
- Use your socket wrench to carefully loosen and remove the drain bolt. Allow all the oil to drain completely. This may take several minutes.
- For a more thorough drain, gently tilt the bike from side to side to ensure the last bit of oil escapes the case.
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Inspect and Clean the Drain Plug
- Check the drain plug for metal shavings or debris, which can indicate internal wear.
- Wipe the plug clean with a rag. Replace the crush washer if it's worn or damaged.
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Reinstall the Drain Plug
- Screw in the drain bolt by hand to avoid cross-threading. Tighten using a torque wrench to 21 ft-lb (28 Nm), the standard spec for Honda CR85 models.
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Measure and Add the New Oil
- Most 2007 CR85 Big Wheel models require about 600 mL (20.3 oz) of oil per change. Always consult your owner's manual or inspect the engine case for stamped capacity numbers. (You may see a fill amount stamped near the clutch cover.)
- Use a dedicated mixing cup or measuring container. If your cup only holds 500 mL, fill it once to 500 mL, pour that in, then add an additional 100 mL to reach the correct total.
- Remove the oil fill plug on the side of the engine. Clean the area around the fill port to prevent dirt from entering.
- Using a funnel (some fill holes are very small; you may need a narrow or flexible funnel), pour the oil in slowly to avoid spills or overfilling.
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Replace the Oil Fill Plug
- Once all the oil is added, reinstall the oil fill plug, securing it snugly (do not overtighten).
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Final Checks
- Start the engine and let it idle for a couple of minutes. Check for leaks at the drain and fill plugs.
- Stop the engine and let the bike sit for a few minutes, then check the oil level again. On the CR85, you may need to remove a small bolt/check screw by the clutch cover to confirm oil has reached the correct height, as there’s typically no dipstick.
- Wipe off any spills and dispose of the old oil safely at a recycling center.
2007 Honda CR85 Big Wheel Specific Call-Outs
- Small Oil Fill Opening: The fill hole on the 2007 CR85 Big Wheel is notably small. Use a slim funnel or fashion a temporary one if needed to avoid spills during refilling.
- No Dipstick: This model does not come equipped with an oil dipstick. To ensure proper fill, rely on precise measuring tools and, if equipped, use the check bolt to confirm oil height.
- Oil Type: Use only manufacturer-approved transmission oil (such as Pro Honda GN4 or equivalent) for optimal clutch performance and engine longevity.
- Drain Bolt Torque: Do not overtighten; stripped threads are common if care is not taken. Adhere to the 21 ft-lb torque spec.
Expert Tips
- Always dispose of used oil and filters at a certified recycling location.
- Keep a maintenance log including date and type of oil used for future reference and longevity of your machine.
For more detailed guides and premium dirt bike parts, trust MotoSport.com — your source for everything motocross.
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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.