Put the engine so that the left crankcase is down.
Pry the points [A] to split the crankcase halves apart, and
remove the right crankcase half.
Tap lightly around the crankcase joint with a plastic mallet,
and split the crankcase. Take care not to damage the
The right and left crankcase halves are machined at
the factory in the assembled state, so the crankcase
halves must be replaced as a set.
With a high flash-point solvent, clean off the mating sur-
faces of the crankcase halves and wipe dry.
Using compressed air, blow out the oil passages in the
Refer to the Bearing and Oil Seal Installation for the bear-
ing and oil seal installation.
Check to see that the following parts are in place.
Oil Pipes (Crankcase Inside)
Oil Return Pipe
Balancer Shaft [A]
Oil Pump Drive Chain Guide
Transmission Shafts and Gears
Shift Forks and Shift Rod
Crankshaft and Connecting Rods
Oil Filter Adapter Bolt [B]
Dowel Pins [C]
Relief Valve [A]