[MikaH2]

I bought this bike with 5,000 miles.

unscrewed The right side panel to install lower wings , noticed the bottle was empty of fluid.
next , I checked under the tank to see if coolant was low … it was full of blue coolant.
I proceeded to fill the reserve bottle of coolant

10,000 miles have gone by and I decided to check the reserve coolant tank.
The reserve coolant tank was empty again.

Does anybody have an idea what’s going on here ?

thanks

 

[H2015]

Only thing I can think of would be if the radiator cap is not holding pressure and slowly leaking off coolant during rides?

 

[Rick150]

KHI recommend you check the high pressure lower hose clamp, I think they mean the one near the radiator if there is coolant loss.

 

[ambasnakeman]

Based on my oast issues with other bikes.
Do check oil color for murkiness. Signs of oil and water mixing. So if oil mixes with water, the new higher volume mix with excess heat will flood the coolant reservoir. And if the reservoir peaks out, it can siphon all the liquid. Hence the max line is lower.

Or there could be material fatigue and reservoir has a faint crack.