Wotcha and welcome Irena - tidy looking motor you have there - feel free to get stuck in with the rest of the forum, all friendly on here. Looks like you have an eye for a photo as well - great shots
As previously said you wont get a reliable 400 with stock internals the cs400 has forged internals. If that is what you want though look at a rebuild first then fuel pump injectors replace rest of exhaust back box should be ok if it has been changed from oem
digi aerial and radio are a more expensive option but best way I found was to drill and plumb in new bee sting - Rally cars drill for their two way comms so it doesnt spoil the look of the car (IMO)
I drilled - process
Big deep breath
measure lots to ensure half way across roof
take lining down inside
centre tap with hole punch
brand new drill bit for pilot hole
brand new drill for larger hole
use a coating of black heavy duty sealant inbetween the unit and the roof prior to winding the nut tight
Wotcha and welcome
you may well have suffered oil starvation if there is no baffle plate fitted and you were doing long high speed corners the oil can be forced away from the pickup or also it may have been the standard coolant pump not pumping the coolant round - apparently the design is fine for lower / med revs but running at a constant level of higher revs can result in cavitation - this would result in the higher than usual temperatures
A perfect example of setting expectations when buying pads for a road car - if they have a track bias they will need to get some heat into them to perform properly but then they will really perform :P
I like the JPS colours of old so black and dull gold (not Ducati / Aprillia orange) is a favourite. Full black will make the alloys look smaller though so a graphite or dark grey will give a contrast without the shrinkage