Suzuki DF25/DF30 Four Stroke Service Manual, Page 140Get this manual
POWER UNIT 7-23 Camshaft runout Using set of V-blocks, support the camshaft on surface plateMeasure runout using dial gauge09900-20602Dial gauge 09900-21304"V" block set 09900-20701Magnetic stand Camshaft runout Service limit0.10 mm (0.004 in If measurement exceeds service limit, replace camshaft
CAMSHAFT JOURNAL Check camshaft journals and camshaft journal bores for pitting, scratches, wear or damageIf any of the above conditions are found, replace camshaft andor cylinder head