How to Do a Yamaha YFZ450R Oil Change

Oil changes are basic routine maintenance tasks essential to prolonging the life of your ATV.

Oil is the lifeblood of your machine, and changing it is one of the simplest maintenance tasks you can do yourself. If you can unscrew and tighten bolts, you can do an oil change on a 2009 Yamaha YFZ450R. Here's how to change the oil on a Yamaha ATV.

Tools and Parts Needed - Yamaha YFZ450R Oil Change


  • 5mm Allen
  • 12mm socket 
  • 3/8 ratchet
  • Torque wrench

Yamaha YFZ450R Oil and Filter Change

Step 1: Start up the engine to let it warm up before you begin with the oil and filter change.

NOTE: Yamaha recommends removing the skid plate before draining the oil.

Step 2. Remove the two 12mm drain bolts from the crankcase cover (one upfront and one to the side). 

Yamaha YFZ450R oil change

Yamaha YFZ450 oil change

PRO TIP: Loosen up the dipstick before removing the drain bolts for easier flow. Check out our Yamaha YFZ450R crankcase cover diagram to see where the bolts are located. 

Step 3. Inspect the oil as it's draining for a silver or gold sheen, which indicates a severe problem with the engine.  

Yamaha ATV YZF450 R oil change

Step 4. Replace the drain bolts after the oil has drained completely, and set your torque wrench to 14 foot-pounds before tightening them back on.  

Yamaha YFZ oil drain bolt

PRO TIP: If you didn't remove the skid plate before taking off the drain bolts, use contact cleaner to spray off any excess oil left behind on the skid plate. 

Yamaha YFZ450 oil change cleanup

Step 5. Remove the bolts that hold the oil filter cover in place using a 5mm Allen.

Yamaha YFZ450 oil filter cover

Step 6. Pull the oil filter cover off and remove the oil filter. 

Yamaha YFZ 450 oil filter removal

Yamaha YFZ ATV oil filter change

Step 7. After removing the oil filter, make sure all three of the O-rings for the oil filter cover bolts are still in place. 

Yamaha YFZ450R oil filter cover bolts

Step 8. Replace the old oil filter with a brand new Yamaha oil filter, then reinstall the oil filter cover and tighten the bolts to 7.2 foot-pounds each. 

Yamaha YFZ450R replacement oil filter

Step 9. Refill the oil tank with about 1 ½ quarts of Yamaha 10W-50 Semisynthetic oil.

Yamalube 10W-50 Semi-synthetic oil

Step 10. Replace the dipstick, and start the engine up again. Let it idle for a couple of minutes, then check your oil levels by pulling out the dipstick. 

Yamaha ATV oil change

PRO TIP: Don't overfill the oil tank, and change the oil again after every 160 hours of riding or every six months.


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