Honda SH300 2006 Manual page 313

Install the cam chain tensioner slider and tighten the
pivot bolt to the specified torque.
TORQUE: 12 N·m (1.2 kgf·m, 9 lbf·ft)
Apply engine oil to the timing sprocket teeth, cam
chain and oil pump chain then install the cam chain
and oil pump chain onto the timing sprocket.
Install the removed parts in the reverse order of
removal.
CRANKCASE/CRANKSHAFT
TENSIONER SLIDER
PIVOT BOLT
TIMING
SPROCKET
OIL PUMP CHAIN
CAM CHAIN
14-17