LC4 640 Duke II - Broken Countershaft

Broke my countershaft on my 2000 Duke II with 33k miles on the street - locked up the rear and caused me to highside, screwin up the bike pretty good.

I have a new countershaft enroute, how deep of shit am I in to replace this baby? LOL.... anyone ever done this?

Anyone have any leads on a 640 LC4 complete motor for sale?

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