My 2002 VFR suffered from the usual VFR problems of snatchy throttle off idle to 5000 rpm and the the incredibly annoying lean stumble at 4500 rpm. The solution, swap out the stock 36psi fuel pressure regulator with a 42psi regulator from a 2000 Honda Blackbird. It's an easy swap, less than two hours, just remove the air box to gain access. The bike is now a joy to ride below 5000 rpm. Totally transformed.
I ordered the regulator though Bikebandit.com (591149 part #).