Yes—the CRF125F uses a replaceable oil filter cartridge as part of its lubrication system, and you replace it when you change the engine oil.
Understanding how the oil filtration works on the CRF125F helps with routine maintenance and engine longevity. This article explains the filter’s type, where it sits, how to replace it, and best practices for keeping the bike’s oil system in good condition.
Oil filter type and location
Key details about the filter type, its location, and its role in the engine’s lubrication.
Filter type
The CRF125F employs a replaceable cartridge-type oil filter that sits in the engine’s lubrication circuit. This is different from older spin-on canister filters and is designed for straightforward replacement during oil service.
Access and location
The filter is accessed by removing the left-side engine cover. It is positioned in the lower portion of the engine where oil passages converge, and it is replaced as part of the oil-change procedure.
Before attempting any service, make sure you have the correct replacement filter and fresh engine oil specified for your model year.
- Filter type: replaceable cartridge-style element
- Access: located behind the left-side engine cover
- Relation to oil changes: replaced when you drain and refill the engine oil
Regularly replacing the oil filter during oil changes helps maintain proper lubrication and engine life.
How to replace the oil filter
Here's a concise, step-by-step guide to replacing the CRF125F’s oil filter during an oil change.
- Warm up the engine, then shut it off and place the bike on a stand.
- Drain the engine oil from the drain bolt and catch the used oil in an approved container.
- Remove the left-side engine cover to access the oil-filter housing.
- Carefully remove the old oil filter cartridge from its housing and discard it.
- Clean the inside of the filter housing and inspect the oil passages for debris.
- Lightly oil the new filter’s gasket with fresh engine oil to ensure a proper seal.
- Install the new filter cartridge into the housing and reseal the cover.
- Reinstall the left-side cover and torque the bolts to the manufacturer’s specification.
- Refill the engine with the correct amount and type of oil, then start the engine and check for leaks.
When performing the replacement, always use Honda-recommended parts and oil. Refer to your model year’s service manual for exact torque specs and filter part numbers.
Maintenance intervals and tips
General guidance to help you plan oil and filter changes, especially under different riding conditions.
- Follow the official maintenance schedule for oil changes and filter replacement as specified by Honda for your model year.
- In dusty or strenuous off-road use, plan for more frequent oil and filter changes.
- Inspect the filter and housing for wear or damage during each service and replace components as needed.
If you don’t have the owner’s manual handy, consult a Honda dealer or service manual for the exact intervals and part numbers, and choose OEM parts for best fit and performance.
Summary
The Honda CRF125F does have an oil filter, implemented as a replaceable cartridge within the engine. It is serviced during oil changes and located behind the left-side engine cover. Follow the official maintenance schedule and use Honda-approved filters and oil to keep the engine running smoothly. Regular replacement of both oil and filter will help protect the motor during all riding conditions.