you only use mixed oil if its a 2-stroke dirtbike
There is a small 'plug' on the bottm of the engine. Put a pan under and take off the plug. Let it drain and give the bike a few small shakes to get the excess out. To put new oil in, look for the oil cap on the left side of the bike, open it and put in the new oil. Then close the cap and your ready to ride.
how much engine oil goes in an 80cc dirt bike
SAE 10w30
Depends on the manufacturer as to what type and weight oil to use.
a quart and a half, approximately...
half a quart and check it.
Castroil
your dirt wont start because if there is no oil there is no oil compression which will cause your dirt bike to not start Answer Before it gets to that point, perform regular maintenance and oil changes. This will increase the life of your engine.
When you change the oil put in 0.53 qt. (0.5) L
a half of quart 2 stroke .....2 stroke oil mixes with the gas only!!! use automatic transmission fluid type f for your gear oil..DO NOT USE 2 STROKE OIL FOR GEAR OIL!!!!
KTM recommends .15L-.20 L of Motorex ATF Super.