2001-2005 Honda TRX250EX Sportrax TRX250EX Factory Service Manual, Page 256Get this manual
REAR DRIVING MECHANISM FINAL GEAR CASE ASSEMBLY NOTE:
When the gear set, bearing, andor gear case has been replaced, check the tooth contact panern check (page 16-8) and gear backlash (page 16-6)Keep dussnd dirt out of the case and
Clean the mating surlace of the gear case and cover, being careful not to damage themBlow compressed air through the breather hole in the