For the oil filter actually. So many bikes with the inline 4's have the filter sitting sideways and perched over the exhaust. During a filter change it's impossible to prevent oil spilling over the pipes requireing a nasty cleanup or living with a blast of smoke for the next 20 kms.
I used to use bits of plastic bag to keep the oil off the pipes but as you all know bag plastic has a devilishlly perverse mind all it's own and results were mixed at best.
For about a year now I've been using aluminium foil to form a catch tray or divertor over the pipes. It's easy to do and unlike the plastic takes and holds shapes like a charm. I haven't done it yet but it might even be possible to use a couple of bits suitably formed to catch and channel the oil so that you don't need to take off the fairing lowers for those of you that can reach the filter without removing the lowers.
Anyway, I thought I'd share this little clean tip with you all. Happy foiling...