My R50 is a boxer and your feet are in the same position on that. There has never been any discomfort from heat. That being said, my R50 is only 500cc so much smaller jugs.
Yes but I am thinking that on a bike like your R50 the seating position is higher (am I right in saying this? That's how it looks to me), which should help.
I have 2 Beemers in my stable (R1100RT and a R1200GS). The jugs are bigger and during a hot day I can sure feel the heat coming off them.
Not that I have ever complained, mind you.