2005-2011 Honda Recon TRX250TE/TM service manual, Page 211Get this manual
CRANKCASETRANSMISSIONCRANKSHAFT Measure the I.Dof the idle gearSERVICE LIMIT: 13.04 mm (0.513 in)
Measure the 0.0of the reverse idle gear shaftSERVICE LIMIT: 12.94 mm (0.509 in)
Calculate the gear-ta-shaft clearanceSERVICE LIMIT: 0.10 mm (0.004 in)
Check the shift fork and fork shaft for wear or damage