2005-2011 Honda Recon TRX250TE/TM service manual, Page 132Get this manual
CYLINDER HEADIVALVE Remove the valve and inspect the valve seal faceThe valve seat contact should be within the sped-fied width and even atl around the circumferenceSTANDARD: SERVICE LIMIT: 1.2 mm (0.05 in) 1.5 mm (0.06 in)
If the valve seat width is not within specification, refaee the valve seat (see below)
Inspect the valve face for: Damaged face:Replace the valve and relaee the valve seat Uneven seat width- Replace the valve and refaee the valve seat