2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 225Get this manual
CYLINDER HEADIVALVECAMSHAFT INSTALLATION Turn he cranksh aft us ing the reco il st ater kno and- align he ark it the ind ex no tc h, hen check th cam lo bes hro ug th cam follow er hol esIf the cam lobes face uprotate the crankshaft ne fu ll turn and match up theT" mark again so the cam lobes face down
INDEX NOTCH
Coal he cam followe rs ith eng ine il and install hem into he cyl inder head
Install th do wel pins and new gasketInsta ll he push rods in the cam follow ers and res hem the gasket cutou as show n