Integrated Headset
A Threaded headset.
yes, the Mechanik STI headset houses campy spec 45/45 integrated bearings, so it will work with a fork with an integrated race. Only difference is you wont need the press on crown race.
no
it is unsealed
Yes - Providing the Deck takes a Integrated Headset? You need to find this out first. Scooter forks are normally the same diameter, Just depends on whether your take takes Integrated Headset cups?
The question is a bit unclear. Usually it's not the fork that's integrated, but the headset. And integrated headsets will only fit in a special kind of head tube not usually found on a standard frame. Forks OTOH can usually take more than one type of headsets.
yes it will
The headset is a set of bearings that allows the fork to turn smoothly in the head tube of the frame w/o sticking wobbling around when you turn the handle bars.
the fork gyro (if have) and stem and mostly important the headset
Yes it does, taking in the consideration that you have an integrated scooter deck.
yes, they can work with both scooters and bikes. but if you ride a scooter, make sure that the headset is integrated or non- integrated all depending on which deck you have.