VERY nice Bike you have there sir......just keep an eye on those spokes! apparently MCN are running a recall campaign over spoke failures on all the Classic style Triumphs.
Plenums
I have been noting the comments on the plenum blockages over the past few months, I havent modified mine, but heres another option....... every week when im cleaning the car I use the vacuum cleaner hose to suck out any leave & debris in the cavity and every few weeks I stick the hose pipe into the drain holes to blast any muck out and stop bad smells coming in thro via the Pollen filter.
keeps it all clean and dry.
Also just for a laugh, try putting your lips into the Vacuum cleaner hose but make sure you can reach the off switch!