Tiger 1050 Expansion Tank

2 days ago i changed my radiator cap due to not knowing how old it was. I did lose a bit of water removing it. I believe this is from the expansion(recovery) bottle tube that runs to the rad. Testing the antifreeze my tester said the antifreeze was up to spec. Now i filled the expansion(recovery) bottle with distilled water to the low mark as it states in the handbook when the bike is cold.
Since doing this i have ridden about 500 miles and upon checking the water level i notice the water is still at the low mark in the bottle and no antifreeze has mixed with it.
The bike sits at 5 on the temperature gauge, The same as before i changed the rad cap. Should i have seen any antifreeze in the expansion bottle by now like a car or is this normal?.

 

so no one knows?

 

Now more than a coupe of tea spoons

 

Thank you. Mind eased.