First advice is - well, ok I don't want to discourage you....
Things which I use here in Riyadh:
Well ventilated light coloured jacket and pants - I have a rally suit, grey / silvery colour. Worn without liners, but with armour.
Airflow boots,airflow gloves - although I worry about the gloves because they don't cover the forearm.
Light coloured helmet with vents - I have a system 5 silver colour.
Good shades (not polaroid, can't read Garmin) and a good hat with a wide brim.
Microfibre cloth or similar to soak and put inside your hat or helmet.
Dark visor is cooler than a clear one.
Cotton mix shirts, so it will hold water when you pour it inside your jacket down your back, front and sleeves.
Water is your friend. I still drink from bottles although I have a camelback, something in my head about the thing. People who know say they are essential because continuous hydration is important rather than stopping every hour for a huge gulp.
You need gatorade or isostar powder too, you will be losing sweat bigtime even though there are no damp patches to be found.
Put slime in the tyres, and have a repair kit and a compressor. Test the compressor will run in the accesory socket without tripping, or use croc clips.
Drill the tank neck-tube and Know thy fuel stops.
The bike does not run hot that I can see, had a small trace of oil off the rhs drive hub seal once but once only.
Take eye-drops (sealed plastic vials) to rinse your eyes. I found the hard way that using the chin vent made my eyes painfully dry.
In summer here, I ride only in the morning, and I am indoors by 1100hrs, when it is getting on for 45C. For me (Irish), this heat is off the scale and best avoided.
Make sure you have no question marks about the bike reliability, i.e. battery.
Normal tools and spare key.
Don't ride alone in remote places, or make sure you have back-up available if needs must.
Google a bit more, it is a big subject.
Happy mid-summers day (tomorrow)
Bin
