Join Date: Jan 2007
Location: Sacramento, CA USA 96814
Steering head bearings, unfortunately, can be bad even if they seem solid - you pretty much have to jack the front end up and take the weight off to check. But, an 05 shouldn't have that problem yet unless you put a ton of miles on it and really thrashed it.
With respect to alignment, I don't know of a good way to check it yourself - shops have alignment jigs that they use for getting the forks straight. Odd wear patterns on the wheels (uneven, or cupping) are indications of a bad front end alignment.
Other causes of shaking can be uneven front suspension settings, or uneven fork oil levels. Also, check your tire inflation as well - raise it or lower it, and see if it does the same thing.
And, it could just be plain speed wobbles. The profile of the PP's cause a quicker turn-in, so I guess they could be more prone to speed wobbles than your previous set - that would be a steering damper issue. I run PP's too, and my bike is rock solid all the way to 170 mph.