Motocross Air Pressure Bleeder Valve Set. The Micro Bleeders are designed for KTM / HUSKY / WP or Marzocchi forks with a M4x0.7 air bleed screws in the fork cap. For use on KTM, HUSKY, WP, Marzocchi, Olins and Paioli Forks with a M4x0.7mm air bleed screw in the fork cap.