Loosen the hose clamp at the breather vent tube.

Remove the tube support bracket capscrew and the bracket.

Remove the tube and the hose from the engine.

Disassemble the breather tube, vapor barrier, and rubber gasket.

Use solvent to clean the inside of the crankcase breather tube, and dry with compressed air.

Use air pressure to blow through the vent tube.

Replace the vent tube if it is clogged or dented.

Use solvent to clean the breather tube, vapor barriers, and rubber grommet. Dry with compressed air.

Inspect the breather tube, the baffle plate, the rubber grommet, and the rocker lever cover for cracks or other damage. Replace if necessary.

Assemble the breather vent tube as shown.

Install the breather vent tube onto the breather tube, and tighten the hose clamps.

Install and tighten the tube support brackets and capscrews.