Good explanation and i understand, but in the real life this is not practical.So what you are saying is that when your bike overheats, you need to wait for it to cool down for hours untill it will "suck" water into the radiator.
Out in the field or on a long trip this might be difficult. From now on, i will be checking my radiator instead on relyijng on the bottle indication....something for Yamaha to think about changing in future.
GB