Howdy. You might check with JonB or Chuck Tator about the availability of 40mm rear calipers. The stock size for “early” non-ABS GTS models is a 36mm diameter piston which was tremendously undersized. 40mm is a pretty good balance. Your signature says 2001, which would have ABS and 43mm rear piston size. This should be really satisfactory as far as front to rear balance and if not, then it’s an issue with how well you like the 3-channel ABS. In this case you could look into using different brake pads. If I missed the mark, and you were really asking about 4-piston rear calipers… disregard above!
