Hmmmm... Just acquired a 2001 Valkyrie Interstate with 2.4K on her: I did a oil change only with the Valvoline 10W-40, MC-specific product (JASO MA) until the 4K, normal oil change interval.
I will then change to AMSOIL AMO 10W-40 as I have been using this in my '93 ZX-11 with great satisfaction. Really made an immediate & positive difference in the shifting the 1st time I tried it
! I leave it in this bike for 3K as it is run a little harder than the Valkyrie will probably be...
Cheers!
p.s. These are, incidentally, the ONLY vehicles in which I currently use 100% Synthetic motor oils.