Hi Mate! First mod, one that I was sorry I didn't do straight away, is to install Renthal Ultra Low's. Its a must. It changes the bike so much for the better. Even my 70-odd year old father (he is a stickler for leaving everything stock on a vehicle) that also has a 919 finally relented and he is extremely happy he did the mod.
It boggles the mind what they were thinking when they fitted that horrid, narrow, "ape hangers" on the 919.