where are you in Indiana? I am in Indianapolis.
First, you need to inspect your calipers. Specifically, you need to get a look in the pad area. Is there much impacted brake dust around the perimeters of the pistons? Any rust on the pistons? At the very least, these areas need cleaned.
If you have never had the calipers serviced -- just brake pad replacement -- I would recommend taking them apart, pulling the calipers, cleaning the calipers, and installing fresh seals. You can get seal kits on ebay from the UK, where there are many 12 owners and a good collection of service parts available. The kits aren't expensive for what you're going to get. Once rebuilt, you will be impressed with the improvement.
Your fluid is going to need to be changed probably. If you're servicing your calipers as per above, you'll have to do this, because you will have removed the lines and drained the system. The piston in the master cylinder needs to be flushed until smoothly sliding. There is a small weep hole in the reservoir, that needs to be clear of debris.
Once your fluid is refilled and properly bled for air at the calipers, and maybe at the banjo connection at the master cylinder, you will have rock solid brakes.
I just did all of this in Spetember 2016, to the OEM 6-pot Tokicos. They work very, very well.
If you don't trust yours, and if you're interested, I can sell you my Tokicos, which were just serviced like I said. I have changed to the newer radial forks and I have Brembo calipers I'm installing this week. Maybe you have the radial calipers as well, I don't know.
If you are still not satisfied, you may want to get a different master cylinder. Some apply more pressure due to differently sized pistons. I know of some options, but don't spend money until your calipers, fluid, and master cylinder you have now are fully reconditioned.
If you're in Indy, we can get together to talk about it.