look at a nelson-rigg silver streak rear luggage bag. I like it on my vino 125.product #ssc-160 about 30 litre capacity, attaches with adjustable elastic cords to the factory luggage rack. also available are saddle bags that attach to the bag. I haven´t seen the saddle bags. it´s easy to release the rear straps to access the gas cap. I got mine throug the jc whitney motorcycle parts catalog.