Yeah... I figured it was worth a try. Was hoping someone had one sitting someplace collecting dust and wanted to make some quick cash.
My understanding is that there are 2 different types of GIVI top cases, Monolock and Monokey... You just need to make sure you get the correct adapter for your case.
No idea the difference... figure the first step would be to get the ALU-RACK.
What size case works well with the 919. Obviously, the bigger the better, but I don't want to make the ride unenjoyable because the case is too large.
Monokey vs. Monolock:
Cases - Motorcycle Top Case
I think you will find a difference in build quality as well. The small Monolock top cases are little less rugged than the Monokey counterparts IMO.
There are many different sizes and configurations that are adaptable to the 919. Do you want color matched or pebble grain, form vs. function, will you add side cases later, how many liters, etc?
I have three E36 Monokey cases (sides & top) with two E45's in addition for more capacity if needed. They can be mixed and matched according to my needs. Color matched is really nice for a top case, but if the bike topples over, you run the risk of damage with too large a case(like E55).
If you add side bags, remember that they are keyed in pairs when purchased and the top case will be a different key. Givi makes lock cylinder sets to get them all keyed the same at an additional fee. I have five bags and bought a 5 cylinder set.
I have the alu rack on the '06 with just one E36/E45. I have the Givi 3 case set up on the '03 for touring.
Check different sites for pricing/shipping details.