I ride a Genuine Buddy and have a Shad SH-29, which means 29 liter capacity. I too would like bigger, but it just doesn't look right to put a bigger one on there.

The GIVI E470 is 47 liter capacity - quite a bit bigger. On Kymco people - from what I remember of them in the shop, they are a tad bigger than the Buddys, but not much, and you have a 200, and I only have a 125, so you might be able to go a bit bigger on the top case. The GIVI E470 seems quite big for a little scooter, though, in terms of look and carrying capacity. Keep in mind, what you put in a top case can cause instability during the ride and the parking.

Givi E30 or E36 are probably a better bet, just based on a size analysis. If you need more luggage space - consider some side "saddle bag" type - but again, too much weight on the back of the scooter, and high, can cause unstable rides. (See related products below).

Also, I do not like my Shad SH-29 because it bends out of shape too often, making it hard to close. I fill it with a small backpack with a couple of dictionary sized books and a notebook for school. Much more than that, and it just doesn't fit.