i think dunlop TT100's ,would be a good choice for a CR750 nice classic tread pattern,(they where the first tyres too lap the isle of man at over one hundred miles an hour) i have used them on my CB750 no problems but they are getting a bit pricey now, fronts last forever i think i had about four thousand out of the rear, unless you prefer something with a more modern tread pattern like sports bike tyres