I'm not sure, I think its a normal bubble. It was already on the bike when I bought it, the first owner bought a dark smoke screen. Its small I can not look out of it at all, it just pushes the wind over my head.
hey bro is that a puig dobble-bubble?? or just a single bubble, because i got the stock one and want to get a db, but it seems that its way taller that the sinble b and therefore it doesnt look that good!