This is the third KAPPA I am putting on a scooter, just like the previous two scooters. The 40 liters perfectly cover my needs for the 300cc scooter I have (SYM Joyride16 300). I installed it myself very easily, but previously I had bought stainless steel Allen screws 5cm long with corresponding safety nuts with a washer (so I wouldn't have to use extra washers under the base) since the screws in the package were too short for the bike's base. In rain and intense washing, no water got in, while the noise when it's empty is negligible. As soon as I put waterproof gear, gloves, etc., it stopped completely. Good fit of the base and the monolock is a game changer, as always. I highly recommend it.

Nice construction and comfortably fits the helmet and waterproof. The only thing I didn't like is that you have to check every time you open it to make sure it closed properly. It has a slight difficulty in closing.