different calipers to suit vfr400

[davvis]

hey all,
just wondering if there are some different calipers that would do a better breaking job on a vfr400 trackie that bolt stright on to the vfr standard forks????

. I have had the mc rebuilt and the bastards are still spongy, also the bike has braided lines, so i am guessing there is air getting in somewhere in the calipers?
just wondering,

if i could snap up a cheap pair it would be better than rebuilding the calipers

[CMSMJ1]

Nothing easily available bolts straight on. You can get brackets to fit the last of the Nissin non radials as found on SP1, blades and CBR6rr etc