I've been vaguely aware that a coolant/antifreeze change on the Falco was well overdue for quite a while now. The last time it was changed was quite a few years pre-Covid, so today I bit the bullet and got on with it. Before that I decided to do a pH test on the old coolant, just to see how bad it was. This was the result:

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To me that corresponded pretty much with 7 (pH neutral) which was a relief as the coolant wasn't actually acidic. Then I did a test on the new coolant I was about to put in the bike and that gave a reading that was only just about one step more alkaline, as shown below:

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So is pH testing a useful way to decide if coolant is still doing its job or not?
There is no cloud, just somebody else's computer.