I bet you live in Australia?
Fit the K&N 148 oil filter.
It is noticeably larger than stock and presents a larger surface area for better heat exchange.
The filter probably increases total oil volume by 50-100ml.
This is what I have done for FNQ conditions.
I run a full synthetic 5W40 even in extreme heat conditions. The radiator fan only kicks in around
town. Take a look at using a premium grade extreme condition radiator coolant. I change my coolant before every summer on my bikes and cars. I only use a middle grade coolant otherwise the cost would be excessive and anyway it gets changed every year which is more than most people do. Also consider getting a "racing" cooling system hose kit once the bike is a few years old.
This motorcycle was designed for Indonesian summers!
One benefit of riding a motorcyle manufactured in a third world country is that it can
cope with extreme conditions like massive overloading, poor roads and hellish summers.