Valve Seat Cutter Kit Carbide Tipped. Honda CRF 450R 2002-08-250R 2004-09. 4x Valve Guide Pilots. 4x VALVE GUIDE HONE REAMER – H S S. 2 x T-Wrench ARBORS + 2 x DRIVE RODS. Valve Seat Cutting with DYNA TOOLS Cutters. Valve seat reconditioning is simple, accurate, and clean with DYNA TOOLS carbide-bladed cutters. User-friendly valve seat cutters allow you to precisely machine a multi-angle valve seat in a matter of minutes. Tungsten carbide leaves a perfectly flat, machined surface, ideal for optimal sealing efficiency and heat transfer. Please feel free to ask any questions.