Suzuki RA410 Manual page 311

6A4-52 ENGINE MECHANICAL
INSTALLATION
1) Remove old gasket and oil on mating surfaces and install new
head gasket (1) as shown in figure, that is, "TOP" mark provided
on gasket comes to crankshaft pulley side, facing up (toward
cylinder head side).
2) Check to make sure that oil jet (venturi plug) is installed and if
it is, that it is not clogged.
When installing it, be sure to tighten to specified torque.
Tightening Torque
.
(a): 5 N m (0.5 kg-m, 4.0 lb-ft)
3) Install intake manifold to cylinder head (If it's removed).
Tightening Torque
(a): 10 N·m (1.0 kg-m, 7.5 lb-ft)
(a)