Honda CH250 Elite 1986 Service Manual page 129

Wash the oil pipe in clean solvent and install new O-rings on
both ends of the pipe.
Install the oil pipe into the right crankcase and secure it with
the bolt.
Install the crankshaft into the left crankcase being careful not
to damage the oil seal.
Install the dowel pins and a new gasket.
Place the right crankcase over the crankshaft and onto the left
crankcase.
CRANKCASE/CRANKSHAFT
11-5