Athena cylinder kits are Based on solid know-how, born from years of experience, that made Athena the equipment supplier for many motorcycle manufacturers. This is why Athena is able to design and produce in-house cylinders and cylinders kits of the highest quality and efficiency, at an extremely competitive price.CAUTION: All Athena products must be used in compliance with the regulations the competent authorities of each Member State. Athena declines all responsibility for any improper use.