This horse has been repeatedly beaten. Type BRAKES into the search bar and kill the rest of the weekend.
Here is a link to one 'fact' based brake analysis:
>>REPORT<<
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Braking test results are wildly variable depending on tires (temperature, pressure, wear, type...); road surface (condition, material, temperature, wear...); motorcycle (weight -- rider? gas tank full? test gear attached?, weight balance/distribution/location, suspension settings...); brakes (wear, rotor condition, temperature, hydraulic system); design of the hydraulic system (bore, stroke, lever travel…) just to name a few things.
Then there is perception based on feel. Grabby brakes can give the feeling of power, but they can be hard to modulate. Brakes with softer initial bite will feel like they have less power, but are much easier to modulate. Wave rotors will enhance initial brake bite, as will different brake pad compounds resulting in the feel of better braking. The Gen II FJRs have a different master cylinder bore, different fluid volume, different pistons, etc which will also affect feel. Heck, changing brake lever styles will change brake feel.
Probably all modern ST bikes can lock up the brakes, so absolute brake force is moot. Once the brakes lock the wheels it just becomes a matter of speed, weight and friction (plus the luck & skill not to end up on the pavement). With ABS allowing the wheels to turn with a slip angle of ~85% braking distance is all about weight and friction, the brakes will be applied to the point of impending wheel lock-up. If you were to put on very large diameter rotors, 8 piston calipers and a hydraulic system that could clamp hard enough to halt a 10 ton truck your stopping distance will still be limited by impending wheel lock-up.
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