2009-2012 Honda MUV700 Big Red Service Manual, Page 240Get this manual
CYLINDER HEADVALVECAMSHAFT Using 60 in ter ior cutter, remove 14 of the existing valve seat material
TOOLS: Interior cutter, 34 mm (INEX) 077800014100 Cutter holder, 5,5 mm 077810010101 or equivalent commercially available in U.S.A
Using 45 seat cutter, cut the seat to the proper width
VALVE SEAT WIDTH: 1.01.1 mm (0.0390.043 in)
Make sure all pitting and irregularities are removed
Excessive lappmg pressure may deform or damage the sear Do nor allow lappmg comp ound enrer the guides