1997-2001 Honda TRX250 Fourtrax Recon Service Manual, Page 107Get this manual
CYLINDER HEADCYLINDERPISTON CYLINDER HEAD REMOVAL Remove the timing hole capTurn the crankshaft with the recoil starter and align the 'Tmark on the flywheel with the index mark on the rear crankcase coverMake sure the piston is at TDC of the compression stroke by moving the rocker arms If the rocker arms are tightturn the crankshaft one full turn and realign theT' mark with the index markINDEX MARK