Hi Ryland,
I honestly believe that the Tenere runs fine without specials spark plugs or additionnal tuning.
it takes some knowledge to start playing with advanced engine setup.
But as you seem interested
http://www.ngkpartfinder.co.uk/motorbikes_scooters.php
http://www.ngkpartfinder.co.uk/mc_se...ere&engine=660
http://www.ngkpartfinder.co.uk/mc_extra.php?id=2594
iridium: CR7EIX