Drain the engine oil sump and place the engine so the timing gear area is facing down...

use a 10mm wrench or socket to remove the 12 bolts holding the sump to the engine case.

If needed, give the sump a couple light blows from a hammer or the like to break the gasket seal.

Inspect the sump for schwarf and clean it with solvent of choice.

Post gasoline wash.

After removing the sump you will be looking at the oil pump pick up screen.

Here is a side view of the pump.

Use wire cutters to remove the safety wire which holds the pick screen in place.

Removing the screen reveals the 2 oil pump retaining bolts at 1 and 7 o'clock.

Use a 10mm wrench to remove the bolts.

One down, one to go.

With both bolts removed, simply pull the oil pump out. Note the long drive shaft which connects to the oil pump drive gear run off the cam.

A picture of the paper gasket for the oil pump. It can be reused if not damaged but why tempt fate?

Use the 10mm wrench to remove the 2 bolts holding the oil pump cover plate.

One removed...

...and with the other bolt out the cover can be lifted exposing the oil pump gears.

The gear attached to the oil pump drive shaft is pressed on to the shaft so I don't pull that apart. The other gear pulls out for inspection.

Turn the engine back over and use a 22mm wrench to remove the oil pump drive gear cover...

...with the cover removed the drive gear is exposed.

Difficult to see in this picture is the square slot to accept the drive shaft to the oil pump.

Lift the drive gear out...you may need a needle nose pliers if you don't have skinny fingers.

Inspect the gear for general condition.

Just a couple of pictures of interest.

These are weld spots from the factory...

...to repair porous spots in the engine case. These are becoming less common with the newer bikes.