Lift the cylinder head off the engine block. Remove the cylinder block (barrel) by sliding it upward off the cylinder studs. Take care not to let the piston slam against the studs.
Remove the top and side cylinder head covers to access the rocker arms. 162fmj Engine Service Manual
Disconnect the clutch cable. Remove the kickstarter lever and the right-side crankcase bolts. Tap gently with a rubber mallet to break the gasket seal. Lift the cylinder head off the engine block
Turn the idle speed screw (centered on the throttle slide) to achieve a stable idle between 1,400 and 1,600 RPM. 400 and 1