Auxiliary fuel tank mounts to all kinds of handlebars, both 7/8" and 1-1/8".Suitable for minis, trials bikes, full size bikes, and anywhere else a little extra fuel is needed.Includes siphon kit that connects the handlebar tank to the main fuel tank and automatically siphons fuel while the bike is being ridden.With this design, the handlebar tank empties first, before the main tank.Does not interfere with headlight, handguards, etc.Holds 0.6 gallons.