2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 336Get this manual
CRANKCASETRANSMISSIONCRANKSHAFTBALANCER (After '05) Measure the connecting rod big end side clearanceSERVICE LIMIT: 0.75 mm (0.030 in) FEELER GAUGE
Measure the connecting rod big end radial clearanceSERVICE LIMIT: 0.05 mm (0.002 in)