Yes, that's a factory new part direct from Yamaha and will be the latest revision (not old stock).

I'd have to double check, but I think I paid $135 for my Graves CCT. The adjustment shaft is O ring sealed and drilled to reduce weight, there's a port machined into the base to redirect the oil back onto the chain rather than blocking it off, and there's more support on the shaft so it doesn't flex. The shaft is stainless steel, the base is 6000 series aluminum and the lock nut is 7000 series aluminum. It's definitely a quality part, but like I said, spendy. Send me a PW if you want my help sourcing parts.