How to Change Honda CRF450R Oil and Filter

Honda recommends changing the oil and oil filter on a CRF450R after every six races, or after every 15 hours of use. Luckily, an oil service on a CRF450R can typically be done in 10 minutes or less. 

Watch the video above and follow the steps below to learn how to change the oil on a Honda CRF-450 motorcycle.

Tools and Parts – Honda CRF450 Oil and Filter Change


Honda HP4 20W-50 engine oil

Honda motorcycle oil filter


Honda CRF450R Oil and Filter Change

Step 1. Remove the left side engine guard to access the oil filter cover.

Honda CRF450R oil change

Step 2. Remove the oil filler cap so the crankcase can breathe, which helps the oil drain faster.

Honda CRF 450 oil change

Step 3. Remove the 10mm oil drain bolt and its crush washer from the lower rear of the crankcase, and drain the old oil.

Honda CRF450 motorcycle oil change

Step 4. Hold the killswitch, and turn the engine over a couple of times with the kickstarter to pump the very last drops of used oil out of the engine.

Step 5. Install a new crush washer, then reinstall the drain bolt and torque it to 12 foot-pounds. 

NOTE: Never reuse the old crush washer, as it won’t seal properly. Crush washers are nexpensive Honda parts to replace, so we recommend buying several at a time due to the CRF450’s need for frequent oil changes.

Step 6. Remove the oil filter cover from the crankcase cover. 

Honda CRF450R oil filter cover

Step 7. Pry off the oil filter cover, and remove the oil filter and the filter spring.

Honda CRF450 oil filter

Step 8. Remove the old O-ring from the oil filter cover, and replace it with a new one. 

Honda CRF450 oil filter cover O-ring

Step 9. Put the spring into the new oil filter, then install the new filter. 

Honda CRF 450 oil filter spring

NOTE: Make sure the end of the filter marked “Out” with the rubber grommet is facing outward when you install it.

Step 10. Reinstall the oil filter cover, and torque the two bolts to 9 foot-pounds.

Step 11. Replace the left engine guard.

Step 12. Refill the engine with Honda 20W-50 engine oil

Honda CRF 450 motorcycle oil change

Step 13. Check the oil level through the sight glass in the crankcase cover just below the oil filter cover and top it off if necessary. Replace the oil filler cap and you’re done.





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