Registration is required to view the Valving Logic web site.  Registration is free.     Register The valvinglogic site contains suspension related information as well as stock and modified valve stacks for dirt bikes. The site is set up in three levels. Level 1 - free.  Stock valve stacks can be found on Level 1. Level 2 - members.  For a small fee, the members level provides basic to intermediate suspension help as well as access to stock and mod valve stacks. Level 3 - tuners.  For a gigantic fee, the tuners level gets it all. email for details