Pill shaped electronics storage for the xs650s. This bolts onto the rear motor mounts and includes the hardware to do so. A couple different options with these guys. These include a hand machined aluminum cap that can be upgraded to brass. These can also be made without the "fill neck".
These are designed to sit flush to the bikes backbone. This requires the removal of all factory brackets and tabs. If for some reason you need the tank to sit off of the backbone feel free to reach out for a custom order.