2007-2009 Suzuki LTZ90 factory service manual, Page 66Get this manual
VALVE HEAD RADIAL RUNOUT Place the dial gauge at right angle to the valve head face and measure the valve head radial runoutIf it measures more than the service limit, replace the valveValve head radial runout: Service Limit: 0.03 mm (0.001 in) 09900-20607: Dial gauge (1100 mm) 09900-20701: Magnetic stand 09900-21304: V-block set (100 mm)