just took the cibby out for a 40k ride, the weather was hot as hell (~32C, no breeze and humid) and I spent nearly all my time stuck in traffic, and booting it at every opportunity. Was keeping an eye on the temp gauge and at worst in standstill traffic with exhaust pouring in my face, it only got slightly above normal. When I got back just before and switched her off, I could hear a gurgling noise that i've never noticed before - I dare say its never been there before. I started poking around and found that there was nothing leaking anywhere... then my suspicion turned to the coolant container and when I touched the lid it was pretty damn hot and I could feel the gurgling vibration coming through, so im pretty sure the coolant was boiling. The bike is at 29,940 km and I was planning to get a service once it hits 30k, but I planned on going on 1 more big ride beforehand tomorrow, about a 100k round trip at slow pace (mrs on pillion). Is it safe to assume that the coolant is either dirty/running low and that a easy ride in the cooler mountain air shouldn't be a problem? I'm gunna go out on a whim and speculate its not meant to happen.