Yamaha Grizzly 660 Oil Change

Nothing makes an ATV’s engine run smoother than a crankcase full of fresh engine oil. Changing a Yamaha quad’s motor oil only takes a handful of minutes, and doing it regularly helps ensure the engine stays healthy for many years.

Watch the video above and follow the steps below to change the engine oil in a Yamaha Grizzly 660.

NOTE: We changed the oil in a 2014 Yamaha Grizzly, but the process is the same or similar for most ATV makes and models.

Tools and Supplies – Yamaha Grizzly 660 Oil Change

  • Ratchet and extensions
  • 17mm socket
  • Torque wrench
  • Drain pan

Yamaha 10W-40 engine oil

Buy Yamaha ATV oil filter

How to Change Yamaha Grizzly 660 Engine Oil

Step 1. Run the engine for about half a minute to warm the oil, which makes it less viscous and helps it drain faster. Remove the dipstick so the crankcase can vent, which also helps the oil drain out faster.

Yamaha Grizzly 660 oil service

Step 2. Position a drain pan beneath the engine, and remove the 17mm oil drain bolt and crush washer. Inspect the crush washer for wear and replace it if necessary.

Yamaha Grizzly 660 oil drain plug

NOTE: The crush washer should be replaced every 3-4 oil changes, regardless of its condition.

Step 3. Let the oil drain out, then reinstall the crush washer and oil drain bolt. Torque the bolt to 22 foot-pounds.

Step 4. Remove the oil filter from the left rear of the engine using a 65mm oil filter wrench.

Yamaha Grizzly 660 ATV oil filter

Step 5. Install the new oil filter, and torque it to 12 foot-pounds.

NOTE: If you’re installing an OEM Yamaha oil filter, it comes with a pre-oiled O-ring. However, if you’re putting in an aftermarket oil filter, make sure you oil the O-ring before you install it.

Step 6. Fill the engine with 2.11 quarts of 10W40 ATV engine oil, and reinstall the dipstick.

Yamaha Grizzly 660 oil change service refill

Step 7. Run the engine on idle for about 15 seconds to circulate the oil, then shut it off and let it stand for a minute so the oil can settle.

Step 8. Remove the dipstick, then wipe it clean and thread it back into the engine. Next, remove it again and check the oil level. The level should be between the middle and upper part of the dipstick. Top off the oil if necessary, reinstall the dipstick and you’re done.

Yamaha Grizzly ATV engine oil service

The steps for changing the oil in a Yamaha ATV are the same or similar across all models. However, if you want a more in-depth look at an oil change on an older model quad, watch the video below to see how to change the oil in a 2007 Yamaha Grizzly YFM700



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