2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 90Get this manual
1D-14 Engine Mechanical: Hold each piston ring with properly position, insert the piston into the cylinder Tighten the cylinder base nuts temporarily NOTE The rounded side of the washer (2) should be positioned upside Apply engine oil to the both sides of washers (2) and thread of the cylinder head bolts before installing them
CAUTION
When installing the cylinder and cylinder head, pull the cam chain upward, or the chain will be caught between the crankcase and cam drive sprocket