NEVER believe your reservoir bottle.
This past weekend i picked up small water leak at bottom of my water pump. riding on and pushing further with a watchfull eye on the reservoir bottle i had to carry on till i get to place to fill bottle.
The bike started to overheat andf light came on just as i got to garage to top it up.
Topped up the reservoir and carried on, but overheat light came on about 5km after garage. Luckily a friend of mine advised that his KTM did the same and water was not stored in reservoir to "top up" reservoir, but reservoir is there to catch overflow of water. To make long story short, i opened radiator cap and it was bone dry. Added water, waited for bubbled to come out, started bike and ran for short while, filled it up to the top and off i go....all sorted.

My issue here is why would i need to check my water level daily before every ride if the reservoir is not true and acurate?...i must check my radiator , not the reservoir....