davidd:
Yamaha still needs to help us with this issue!! Not to steal the thread, but does everyone still agree that the pulley nut should be torqued to 125ft lbs. We keep hearing about this ussue and a definitive answer from people who have not had probs for many miles would be useful for everyone involved. I replaced my lockwasher this past summer, torqued to 72, no loctite, it has held for 5k, but as we all know it could come loose at any time. Too many posts like this. Good luck getting it fixed, let us know how difficult it really was.
davidd ..... IMO you need to help youself here and retorque your frt pulley nut to a higher value. You're doing an injustice to your ride @ 72 ft~lbs unless you ride like a wimp
... JK
It has been well documented on this site that the '06' & > Warriors have a newly designed middle shaft, transmission output shaft,retaining nuts , inner brg/brg housing etc to resolve this issue. I can recall one member with an earlier bike upgrading to the new parts as i mentored him with the conversion.
Out of the gate, the loose pulley syndrome appears to be more prevalent and common with the later bikes produce between 2004-2005 that didn't go through the factory trani recall. My rationale is that the technician/mechanics used an impact gun on reassembly of the nut during the recall campaign 
My hands-on here: http://rswarrior.com/forums/p/20832/324166.aspx#324166