Happy! A quick run on Slick's dyno showed that the misfire was a plug on the way out. New plugs and the bike screams all the way to 127 bhp once again!
At £221 plus vat per set, it's a good thing this doesn't happen too often!
My Dutch friends Henk and Dirk were vastly amused last year by the expression "Mad as a box of frogs". So they brought Slick a present! The sign in Dutch means "A box of mad frogs".
Slick, the dynomeister!
The thing, y'see, about washable air filters is that you should wash them occasionally.