There was a company that used to make replacement caliper brackets for radial brakes, but I've heard they no longer do this.
From what I've read, the RC51 has excellent brakes for non-radial design, and the biggest improvement will come from proper pad material selection and a radial master cylinder and braided lines.
Choice of new front end? Ohlins R&T forks of course!
As a side note, I happened to glance at one of Honda's concept bikes and it's forks looked exactly like RC51 forks (compression adjuster knob on front) except with radial brakes. Amazing.
From what I've read, the RC51 has excellent brakes for non-radial design, and the biggest improvement will come from proper pad material selection and a radial master cylinder and braided lines.
Choice of new front end? Ohlins R&T forks of course!
As a side note, I happened to glance at one of Honda's concept bikes and it's forks looked exactly like RC51 forks (compression adjuster knob on front) except with radial brakes. Amazing.