Buy Athena Motorcycle Thermic Units, Gaskets and an Assortment of Other Parts at Firestorm Motorcycles. Free Shipping Australia Wide. Over the last few years Athena has set up its Aftermarket Division which operates exclusively in the motorcycle sector and produces gaskets, thermic units and spare parts for each make and model all over the world. Athena is market leader in the preparation of gasket kits for the repair of mopeds, motorcycles, jetski, outboards and Harley Davidson offering the most complete range in the world. Besides gaskets, Athena offers also oil seals and fork oil seals of original type, bearings and AP Racing brake pads.