I've been looking at getting a spare set of rims with wets for rainy trackdays, it might be cheaper to buy a CB500 to be fair.
You'll not be far off, especially if you find a road hack for a few hundred quid as they're all former learner or Deliveroo bikes To be fair though, I just got too lazy to change wheels all the time and big bikes have a lot of unusable power in the wet unless you really know what you're doing.
Bit of a wet start, but a fairly dry afternoon. Finished off the left side of the rear tyre though as it's an anticlockwise circuit.
I only know of the building to the left of the lorry was the last time I had a briefing indoors. Now it's outside in the paddock.