YZ85 Radio mixture question?

Hey i have a yz85 the radio is 32:1So how much oil will I need to put in the petrol for a fuel tankmy tank is 5 litre

If the ratio is 32:1, then you need 32 litres of petrol for every 1 litre of oil. That means that 5 litres of petrol will require .156 litres of oil, or 1.56 decilitres, or 15.6 centilitres, or 156 millilitres...