2005-2011 Honda Recon TRX250TE/TM service manual, Page 129Get this manual
CYLINDER HEADIV ALVE Check the cylinder head for warpage with straight edge and feeler gaugeSERVICE LIMIT: 0.10 mm (O.OO4 in)
VALVE SPRING
Measure the valve spring free lengthSERVICE LIMITS: Inner:
41.1 mm (1.62 in) 42.9 mm (1.69 in )