Check it every time. Above all, the brakes are the most important.

Rear-wheel steering

Drop a gear
Simultaneously clutching, blipping, downshifting and braking

Chain lube
Take care of it once every fortnight.

Motor oil
The oil should be changed regularly as it
deteriorates due to high temperatures, contamination with metal particles, etc.

For safe riding
Stay away from large vehicles.
Back off the throttle so that you can apply the brakes at any time when entering an intersection.
When looking behind, back off the throttle beforehand to slow down.