@ Rod Frost : The 2017 390 and the Vit are almost the same bike. So you can install parts for the 390 on the Vit.
I’m 99.9% sure the power tronic will work on the Vit.
@ Vp-1 : It’s great to see a dedicated specialist here 🙂 ! I was aware of the loss at low revs but i’m (still) hoping that the overall gain worth it :-).
For the gearing, i think the 15*45 is already a bit short. I plan to go for a 16*43, i know i’ll have to use the clutch in 1st but the 6th is definitely too short for my crusing speed during long trip. ( i’d like to lower the rpm by 1000 at the same speed)
To cover the loss of the air box, i hope that the control of the cloosed loop will give me the “sensation” of torque by running the correct AFR when i’m not full gazz ( tipically a town situation).
I also study the possibility of installing a non o-ring chain with a chain oiler. I think there are some noticables gains here, especially on small engine like us (I love this one at 1.10 min : https://www.youtube.com/watch?v=Wb01cxFS1bw) (a non O-ring chain is also lighter 😉 )
If you do a custom pipe, i’m naturally interested, don’t hesitate to share it here :). I’d love to know how to do that by myself !