Feeling uncertain on the D404s I put on the 1000s, was googling around and discovered the new BT46. It comes in all the right sizes for old guzzis. So I'll put a pair on the 1000s and report back.
If they're good, I may also put on the LM 850 (I put 90/90 and 110/90 ClassicAttacks on that). That bike rides amazing even on that tiny front tire - feels like a bike that handles far better than what it is. Not a lot of contact patch up front, but it really tips in magically, minimal effort to turn in - undersize tire up front may be a good thing. Reminds me a little bit of riding my old Aprilia RS250. Makes the bike feel lighter. But I run it all the way to the edge and it's a little scary with the little tire up front.