No, you're right, for normal street riding it shouldn't need it, would it help? Yes but if it feels way off It's definitely worth investigating. You don't get a set of ohins just to crank the preload up to max, you sure you're only 225lbs but you are 65lbs heavier than what it's set up for...
Could something be up with the DES?
The bike has ABS, no? Hence the shuddering from the front brake...
I'd love to know how it turns out for you.
Good luck
225lbs with full gear and back pack (laptop camera and spanner), minus leather pants though.
No ABS. I opted for the non-ABS Panigale. I should have zero viberations or brake noise! The bike cannot be set up for a 160lbs rider including gear...that's insane! That's Pedrosa!!!!
I played with the DES, stock sport, race and even maxed out full stiffness compression. At full stiffness it didn't stop bottoming out at all, but reacted slowly to normal small bumps. The ride was horrible. The speed of compression is fine near stock "sport" settings at 18 clicks. I prefer 14.
The preload (stock 8mm or 8 full turns) was a bottom out fest on any comp settings, so I first increased preload by 2 more turns. Still bottomed. Then another 4 turns (still bottomed), then another 2 to max (still bottomed!!!).
And I am talking bottoming on 6 inch endos at red lights dropping from 60kph!!! This isn't scrubbing 100kph off at the end of a track straight.
At max preload the bike rides better, and feels better under hard braking, but I still get the vibrations and noise at the end of the braking. Before maxing the preload, I would bottom out, the rear would not even hint at raising and the front end would lock, chirp and slide like no other bike I have ridden. I mean I was locking the front on average medium to hard braking on Bloor St. traffic in 25 deg. C temps!
There is no way I should be bottoming out and locking the front tire wheel under those conditions.
Since maxing the preload, I can at least get a 6" to 1' endo going, but I don't feel confident on the brakes as I am at the bottom, vibrations are present, and there is zero play left in the suspension to mitigate any feedback.
This is definately not a normal situation. As I said, my ZX10R before this never had such issues. I am starting to believe I have a fork problem.
I'm gonna make a video of it on my ride tonight and email my dealer / mech to have them review it before I come in for a service. I am leaning toward a warranty issue at this point.