Cold start issues in summer too

I posted a post 2 months back about my n250 requiring 3-4 minimum starts to get on running on idle. But even when temperature is above 40°C that thing doesn't start in one time. What shall I do?

They cleaned my throttle body in second service which was 2 weeks back.

They topped up oil.

And some basic servicing was done on bike.

Should I change to better quality of oil?