Here's a repost from the Tech section:
I tried to post a "how to" with 4 photos but it was bounced for being too big. I'll try again...
After 10 weeks the GIVI top case Fitment kit SR90-KR90 arrived from overseas for my 2010 Yager GT 200i. The kit indicated it was for a 2007 Dink 125 cc, but they must be the same body as the Yager/Dink, etc as the kit fit perfectly. Total cost including 7% sales tax was $86.45.
I was able to install the kit in about 15 minutes using: 10 mm socket to remove and not reuse the two bolts just above the rear rectangular reflector, 5 mm allen socket to remove and replace the two chrome round/allen head bolts that are under the backrest and hold the luggage rack supports and also to install the long vertical supports with longer supplied GIVI bolts, and 4 mm allen socket to attach the top of the rack to the vertical supports. Make sure you follow the kit diagram for the vertical supports so you don't reverse left and right ones. The bolts go on the outside of the support.
The kit comes with easy to follow diagrams.
The kit can be ordered from your local GIVI dealer. I ordered mine from David at Rider's Hill in Dahlonega, GA, 706-864-7777. GIVI Reno was also helpful in figuring out the correct part, 877-375-4484 for you West Coasters.
You might have to drill a few holes in your plastic top case plate to match the metal mounting kit, depending on which top case and adaptor you use. Not a big deal. I mounted a GIVI Traffic Case with a universal GIVI plate that I've had for about 10 years.