Valve Seat Cutter Kit Carbide Tipped. Honda CRF 450R 2002-08-250R 2004-09. Mills in the following sizes. 26 mm 30-45-60 Degree. 31 mm 30-45-60 Degree. 36 mm 30-45-60 Degree. 5.5 MM, 5 MM, 4.5 MM, 7 mm. VALVE GUIDE HONE REAMER – H S S. 2 x T-Wrench ARBORS + 2 x DRIVE RODS. Please feel free to ask any questions. Track Page Views With.