Watch bicycle repair man change the airfilter of his Duvvie. First new airfilter in 66657 km, a bit overdue compared to the recommended interval of change every 18000 km. Here's what you need and how to do it.
The first thing you need to do is to lay your moist hands on a new arfilter. Here is a picture of the tag on the package i bougt from my local HPP ( Honda Parts Pusher ) supposed to contain a new airfilter for my Duv, which it actually did.

I never use crap tools when fiddling with my Duv, and i always keep my aerosol collection at hand, to clean and lubricate all the parts i get in contact with, while i am at it. I also use copper paste on nut & bolt threads when assembling, to avois seizure.
The tools needed for this job is 8mm, 10mm & 12mm socket wreches with extensioner and rachet.
A 5 mm Unbraco hex key ( left screwdriver lookalike ). I preffer to use the screwdriver type to avoid damage to the surrounding fairing when tightening / untightening.
And finally a screwdriver, star type ( or whatchummacallit ).
In addition i used some clean rags, for cleaning the grit, grime and dirt off the dismatled parts, and the ignition key, to unlock the seat, allowing it to be removed.
Use ignition key to unlock seat. Lift rear end out of the lock, pull seat off backwards. Unscrew hex bolt on left sidepanel and remove. Remove right sidepanel ( no scewing involved ).
Two 10 (or 8)mm nuts, two star screws and two unbraco hex screws.
Pull the fairing plastic cock out of it's rubber vulva in the tank.
Close and prefferably remove the fuel cock handle. This involves a screwdriver to unscrew the screw in center of the cock handle.
Pull off the main fuel supply tube from the fuelcock. This causes some fuel spill.
Remove the 12mm bolt from the rear end of the tank.
Remove these two rubber tubes by pulling them downwards. Pull fairing plastick blob out of tank rubber mount. Make a bed for the tank. You do not want to damage the paintwork or the fuelcock by letting it rest on your concrete shed floor. I use my lawn as bed and a piece of wood as riser, to keep the fuelcock off ground. Lift off the tank gently. Avoid damaging the fairing. Place tank in bed.
Pull off these two rubber tubes by loosening the steel clamp and thereafter pulling the tube off. Help them move, if nececcary, with a flat screwdriver ( Yes, i forgot to mention that you might just need a convetional flat screwdriver on the - tools needed - page. Sorry! )
The ten screws that holds the lid of the lunchbox in place are situated as indicated. Remove in random order.
Be sure to wear white gloves on this important occasion.
Do not loose any tools, rags, nuts, dirt or any other kind of object into the two air intakes. This is the moment it usually starts to rain.
Note Bicycle Repair Man's silly grin, which proves that even an imbecile can change the aifilter of a Duvvie.
This time use cross tightening and equal amount of torque.