Yamaha YFZ450R 2017 Owner's Manual page 100

TIP
When adding oil, be careful not to overfill the en-
gine oil tank; the oil level rises faster starting from
the half-level mark on the dipstick.
6. Check the O-ring for damage, and replace it
if necessary.
7. Insert the dipstick into the engine oil tank filler
hole, and then tighten the engine oil tank filler
cap. NOTICE: Make sure that the engine oil
tank filler cap is securely tightened; other-
wise, oil may seep out when the engine is
running.
[ECB00363]
To change the engine oil (with or without oil fil-
ter element replacement)
8
1. Place the ATV on a level surface.
2. Remove the engine guard by removing the
bolts.
1. Engine guard
2. Bolt
3. Start the engine, warm it up for several minu-
tes, and then turn it off.
4. Place an oil pan under the engine to collect
the used oil.
5. Remove the engine oil tank filler cap, and
then remove the engine oil tank drain bolt and
its gasket.
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