TwinAir Complete Air Filter Maintenance Kit. To make things easier for you, Twin Air has brought you this Bike Maintenance Kit to keep your bike in the best shape, providing you with maximum performance. Keep your air filter clean, and you’ll keep your engine running at top power – and running longer. The System is the solution – everything you need to clean Twin Air air filters in a sturdy storage box with carrying handles, including the Twin Air Cleaning Tub, Oiling Tub, Dirt Remover and Liquid Power Filter Oil, plus Twin Air Contact Cleaner. Twin Air cleaning tub. Twin Air oiling tub. Liquid Power Filter Oil (1L). Multi-purpose contact cleaner (500ml aerosol). Cleaning tub is resealable and comes with a filter tray that allows dirt to sink to the bottom, away from filters. Oiling tub allows filters to be submerged for easy, even oiling. When not in use, the oiling tub is resealable, enabling users to save unused filter oil.