as per honda....every 500hrs...you may check if needed....usually a leakdown test determine....in laymen's term.. only when you feel power losing or compression leaking ...
after initial running.....yes 80-100hrs ..but every 30hrs....check its level
Yes, i always try to check on every startup
get its auto low oil switch operational just to prevent any future damage if sensor is installed and working fine
Have checked it when i was overhauling it and it is operational from day one Allah ka shukar hy