Suzuki RM-Z250 Owner's Manual page 104

4-24 DISASSEMBLY AND ASSEMBLY
Cylinder Head
• Install the dowel pins 1 into the cylinder and then install the
cylinder head gasket 2 onto the cylinder.
NOTE:
Replace the cylinder head gasket 2 with a new one.
• Place the cylinder head 3 on the cylinder.
NOTE:
Do not drop the cam chain 4 into the crankcase.
• Apply engine oil to the washers and thread portion of the bolts
before installing the cylinder head bolts.