I too would like to mount a rear trunk on a vino 125. I have a large trunk on my majesty and find it very usefull. The gas cap on the vino is the problem. I saw a vino 125 with a large trunk, probably 40+ liters. but I wasn´t smart enough to look closely as to how the mounting bracket allowed access to the gas cap. Any help with this problem would be greatly appreciated. rj