2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 188Get this manual
CRANKSHAFTTRANSMISSION ASSEMBLY INSTALLA TION Cleen ell isassembled perts in solvenllhoroughlyApply engine oil to the geaf teeth, sliding surface, shifter grooves and bushingsAlways install the thrust washers and snap rings with the chamfered (rolled) edge fac ing away from the thrust lo.dAfter installing the snap ring, slightly open Ihe ring end rotate it in its groove to be sure it is fully sBaledDo nOI use worn snap rings which could easily spinning in the grooveThey may be too loose to property seat in the grooveAlign the gap In Ihe snap ring with Ihe groove of splineAlign Ihe holes on Ihe shafts and bushings