After riding 150km with no issues, remember i had to change one way bearing and complete clutch with 7km, every day i watch de coolant reservoir its seems be a little lower, i flushed and fill it witch Bosch 50/50 premixed. My concern is the gasket dividing water and oil at the clutch case, i dont think they are mixing, or leaking a bit, i hope so. When assembled i dont put gasket glue or anything, just the gasket. Or probably he is self bleeding.
Besides that theres no other leaking, from hoses or water pump.

[2015 Z Force 800 53/Trail EPS]

Are you loosing coolant?

No, nothing. I checked everywhere.

if you drained and put in new coolant, you're system is just working out air bubbles. This is normal.

When you need to be concerned is when you have white smoke coming from the exhaust, water in the oil, or a sweet smell coming from the exhaust.

With 270 km i Just added 500 cm of coolant, total by  now 3500 when totally empty is 3000, i think something is no going well.
I will check oil stick to see if it is there since hes not leaking at all.
I think i have to take again everything apart, and add Some gasket glue or sealant to the gasket. This is a problem in a low pressure part of the engine since Its not related with head gasket or cylinder