Hmmm, yes, do the idling fan test.
The only time I've ever noticed the fan on my Zeal turning on was when I spent several minutes drawing a smiley face on the driveway at work with my GT501s, then rode it (slipping and sliding around on the semi-liquid rear tyre) to Mt Eden MC for the Sport Demons. I parked up at Mt Eden, killed the engine and noticed that the fan was still going.
It was a very hot day.
I've noticed the same heat thing you describe on the Zeal, recently. I think it's just the weather. A 10°C difference in ambient temperature will make a big difference in the heat your legs notice coming off the engine. Doesn't mean the engine is running wrong.
kiwibiker is full of love, an disrespect.
- mikey
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