Heyya, I have a couple of H1's, one road, and one a race one I'm building up into a no compromise race bike.
If your looking for a better brake solution using the standard forks, a good start is a brembo master cylinder. A 19/20 mm one is a race style, shorter but stiffer pull, with a bit less"feel". A standard road style 16.5 mm brembo master gives a softer pull over a longer span, and gives a better feel, a definite + on slippery roads and such. If you want to go further, getting your hands on a second hand pair of 4 piston brembos (Commonly off late 90's model aprillias and ducatis) gives 20% more pad area, and the calipers are of a superior build to the standard tokios. As the standard calipers are 63mm spacing, and the brembos are 65 mm spacing, you will need to have adapter plates made. Not a biggie for a engineer with a bit of experience and skill to knock out.