WP Xplor Fork Preload Cap Wrench. The HP Tools Xplor Fork Preload Cap Wrench is a dedicated tool for servicing WP Xplor motorcycle forks, making preload cap removal and installation precise and repeatable. It securely holds the fork cap when loosening or tightening the cap lock nut on the damping rod, helping prevent damage during fork service and rebuilds. Fork cap wrench is necessary for servicing WP Xplor motorcycle forks and adjusting the preload cap. Constructed from 1/8" stainless steel for durability and a precise, non-flex fit on the cap. 3/8" drive square in the center allows use with a torque wrench for accurate tightening.