Honda CRF125F Engine Oil Capacity Best Oil Specifications

The Honda CRF125F is a reliable and versatile dirt bike designed for riders of all skill levels. Proper engine oil maintenance is essential to keep the CRF125F running smoothly and extend its engine life. This guide will cover the recommended oil specifications, the steps to check, add, and change oil, and the importance of using the right oil for your CRF125F. This manual is purpose to CRF125F 2020,2021,2022,2023,2024,2025 year of production

Importance of Engine Oil Maintenance

Using the proper oil and regularly checking, adding, and changing it will help extend your engine’s life. Even the best oil wears out, and changing it helps eliminate dirt and deposits accumulated in the engine. Operating the engine with old or dirty oil can damage your engine, while running it with insufficient oil can cause severe damage to both the engine and transmission.

Oil Recommendation for the CRF125F

Choosing the right oil for your Honda CRF125F is crucial for optimal performance. Here are the recommended oil specifications for this motorcycle:

API Classification: SJ or higher, except oils labeled as energy conserving or resource conserving on the circular API service label.
Viscosity (Weight): SAE 10W-30*
JASO T 903 Standard: MA
Suggested Oil: Pro Honda GN4 4-stroke oil (USA & Canada) or Honda 4-stroke oil, or an equivalent motorcycle oil.

Note: Suggested oils are equal in performance to SJ oils that are not labeled as energy conserving or resource conserving on the circular API service label.

Additional Oil Recommendations

Avoid Oil Additives: Your motorcycle does not need oil additives. Use only the recommended oil.
No Graphite or Molybdenum Additives: Do not use oils with graphite or molybdenum additives, as they may adversely affect clutch operation.
Avoid Energy Conserving Oils: Do not use API SJ or higher oils displaying a circular API energy conserving or resource conserving service label on the container, as they may affect lubrication and clutch performance.
No Non-detergent, Vegetable, or Castor-Based Racing Oils: Avoid these oils as they are not suitable for your CRF125F.

Temperature Considerations

For normal air temperatures, SAE 10W-30 is recommended. Refer to the following chart for other viscosities that may be used when the average temperature in your riding area is within the indicated range:

Temperature Range (°C)	Viscosity
-10 to 0	SAE 5W-30
0 to 20	SAE 10W-30
20 to 30	SAE 15W-40
30 and above	SAE 20W-50

Checking and Adding Oil

Regularly checking and adding oil ensures that your CRF125F engine operates efficiently. Here’s a step-by-step guide on how to do it:

Park Your Motorcycle: Ensure your bike is on a firm, level surface.
Clean the Oil Fill Area: Clean around the oil fill cap/dipstick and nearby surfaces to prevent dirt from entering the engine.
Warm Up the Engine: Start the engine and let it idle for 3-5 minutes, then turn it off. Wait 2-3 minutes for the oil to settle.
Remove the Oil Fill Cap/Dipstick: Unscrew and remove the oil fill cap/dipstick, then wipe it clean.
Hold the Motorcycle Upright: This position provides an accurate oil level reading.
Check the Oil Level: Insert the dipstick until it seats, but do not screw it in. Remove it and check the oil level:
- Upper Level Mark: If the oil is at or near this mark, you do not need to add oil.
- Lower Level Mark: If the oil is below or near this mark, add the recommended oil until it reaches the upper level mark. Do not overfill.
Secure the Oil Fill Cap/Dipstick: Insert and screw it in tightly.
Check for Oil Leaks: Inspect the area for any signs of leakage.

Changing Engine Oil

Changing the engine oil is a crucial part of maintaining your CRF125F. Follow these steps to change the oil properly:

Warm Up the Engine: If the engine is cold, start it and let it idle for 3-5 minutes. Turn the engine off and wait 2-3 minutes for the oil to settle.
Park on a Firm, Level Surface: Use the side stand to keep the motorcycle stable.
Place a Drain Pan: Position a drain pan under the crankcase to catch the old oil.
Remove the Oil Fill Cap/Dipstick: This allows air to enter the engine, facilitating oil drainage.
Drain the Oil: Remove the oil drain bolt and sealing washer, allowing the oil to drain completely into the pan.
Dispose of the Old Oil: Pour the drained oil into a suitable container and dispose of it in an approved manner. Improper disposal of drained fluids is harmful to the environment.
Install a New Sealing Washer: After the oil has drained, install the drain bolt with a new sealing washer and tighten it to the specified torque: 18 lbf·ft (24 N·m, 2.4 kgf·m).
Add New Oil: Pour the recommended oil into the crankcase, approximately 0.9 US qt (0.85 L).
Secure the Oil Fill Cap/Dipstick: Install the oil fill cap/dipstick securely.
Warm Up the Engine Again: Start the engine and let it idle for 3-5 minutes. Stop the engine and wait 2-3 minutes.
Check the Oil Level Again: Hold the motorcycle upright on level ground and check the oil level. Add oil if needed until it reaches the upper level mark.
Inspect for Leaks: Check the area for any signs of oil leakage.

Environmental Considerations

Proper disposal of used oil and other toxic wastes is crucial for protecting the environment. Here are some guidelines to follow:

Recycle Wastes: It's illegal and thoughtless to dispose of used engine oil in the trash, down a drain, or on the ground. Used oil, gasoline, and cleaning solvents contain poisons that can harm refuse workers and contaminate our drinking water, lakes, rivers, and oceans.
Use Proper Containers: Before changing your oil, make sure you have the proper containers to store and transport used oil.
Visit a Recycling Center: Take used oil and other toxic wastes to a recycling center. Call your local or state office of public works or environmental services to find a recycling center in your area and get instructions on how to dispose of non-recyclable wastes.

Regular engine oil maintenance is vital for the longevity and performance of your Honda CRF125F. By following the recommended oil specifications, checking and adding oil as needed, and changing the oil at appropriate intervals, you can ensure your motorcycle runs smoothly and efficiently. Additionally, proper disposal of used oil helps protect the environment, making your riding experience more responsible and sustainable.

Keep your CRF125F in top shape by adhering to these maintenance practices, and enjoy the thrilling adventures it offers with peace of mind.

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