Not had my TCK's above 35 (legaly) yet here on Guernsey but correct tyre pressure and more preload seem to be the things to check.

For high speed weave I had some at 85-90 incidated on BT45 so it's not just limited to the tck's (though they are worse)

@Mech - It might be worth checking your stearing head bearings. I've just taken in my bike to the local dealer with similar problems (including a pronounced 35mph weave) and seem they need adjusting if not replacing.
I'm also wondering if the grease levels were low as after him testing them the problem seems a little better at the moment so presumably some grease has been loosened/moved
(I've got it booked in to be sorted next week so not had my fix for this yet)