2003 Suzuki LT-Z400 Factory Service Manual, Page 62Get this manual
VALVE STEM
from the valve seat Mea sure the valve stem deflection in two directions, and "Y", to each otherPosition tile dial gauge as shown, If the deflection exceeds the service determine whether the valve or the guide should be witll new one
09900-20606: Dial 00 mm) 09900-20701: Magnetic stand Valve stem deflection Service Limit: 0.35 mm 4