World Superbike Racer
Join Date: Feb 2005
Location: Los Angeles, California
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I wasn't aware of that, I will have to double check with my suspension tuner.
From my understanding, since the springs are stiffer, more force will be needed to compress the springs. Quicker or easier turn in is achieved by changing the geometry or angle the bike points down. Since the OEM springs are usually too soft for the average rider, when braking before or into a turn, the bike's angle is pretty steep, allowing for easier/quicker turn in.
Stiffer springs will effect this angle now, so it will tend to be more difficult to turn in. papo600RR's solution to raise the forks in the triple is essentially making the bike's nose point more downwards, allowing for easier/quicker turn in.
A couple things you can do to adjust is to make it turn in easier:
1) Adjust fork compression to make it softer so the front-end can compress (turning compression counter-clockwise)
2) Raise forks above the triple clamp. Do this by 5mm at a time. quasi888 did this after redoing his suspension to test the settings. From what I last read, he put the geometry back to the stock settings. You may try to PM him to get his thoughts.
3) Reduce rear preload, this will raise the rear of the bike, essentially making the bike point downward more (this may effect exit on a turn since the rear may squat more, always make some small increments)
4) Softer springs. Of course do this if everything else doesn't seem to work. It's possible your weight changed or a softer spring rate was needed. My tuner mentioned to me that Jake Zemke opted for softer springs than what was usually recommended in the rear because it was too stiff and didn't feel comfortable to him.
Of course, I'm still learning. Keep on reading various resources and see where most of the items match. Try some settings also once you understand what the adjustments are supposed to do. Good luck.