2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 255Get this manual
CLUTCHKICKSTARTERGEARSHIFT LINKAGE ('04'05) Check the kickstarter pinion gear and spindle for damageMeasure the kickstarter pinion gear I.DSERVICE LIMIT: 22.05 mm (0.868 in) Measure the kickstarter spindle O.DSERVICE LIMIT: 21.95 mm (0.864 in)
Check the kickstarter idle gear and bushing for damageMeasure the starter idle gear I.DSERVICE LIMIT: 21.07 mm (0.830 in) Measure the kickstarter idle gear bushing I.Dand O.DSERVICE LIMITS: ID 17.04 mm (0.671 in) O.D 20.96 mm (0.825 in)