Tremor-
Here is a guide with photos on an R6 forum, your Tenere lock cylinders will have the exact same pins/tumblers. Yamaha has used them since the 70s.
http://www.r6messagenet.com/forums/r6-how-guides/49498-how-re-key-new-seat-lock-assembly-use-your-old-key.html
He is replacing the lock...