Not a direct replacement for a shop/repair manual this self study manual will give you a break down of all components and systems, realistically its a step below the shop manual but still a great way to get intimate with your Duke 390....
from the dealer here and from my test ride Duke 200 VS 390 on the suspension
390 has a very significant harder rear and less noticeable front.
for those that weight about my 80kg, once seated down ... 200 would bottom more then 390.
i have spoken to nitron Malaysia and they are willing to custome my 390 but i need
to send my bike there for day as they have no 390 model yet. cost will be around USD1K with adjustable height, damper and rebound.