Main shaft needle bearing replacement

[ian48th]

While trying to remove the clutch pushrod of my 2000 M900Sie I discovered wear near the right side end, then when trying to get the pushrod out the left side of the engine I noticed that the needle bearing inside the right end of the main shaft is shot.  As in needles falling out.  Not the bearing in the pressure plate.  Did I explain that clearly enough?

Looks like #31 in this diagram: https://oem-parts.hu/en/parts/ducati/2000/900/gear-box-3679231

So, how bad is this?  Any chance it can be replaced without removing the shaft?

FWIW, 53,000 miles on the bike, which is otherwise still in great shape.  Thanks!

[Howie]

Not sure, but I would want to inspect the whole transmission anyway.