Hello Uczbpha,
I’ve fitted one, found relatively cheap one on ebay.
I was a little disappointed as it’s quite narrow, at only 3.5”.
It extends down from the numberplate’s bottom edge by around 4” to 4.5” depending on where you measure too, as the bottom edge of the ducktail is V shaped.
Dose it reduce road spray?
Yes, to some extent. But due to it’s narrow width it only really reduces the amount of stuff coming up off the centre of the tyre.
So there is a bit less dirt sprayed up onto the central area of the topbox, where the release catch and lock are.
In an attempt to improve matters a bit, I’ve just added some 2mm thick rubber sheet behind the ducktail, extending it out to the width of the numberplate. But, what with current travel restrictions, I’ve yet to see how much more spray this will stop.
The ducktail uses double sided tape to fix it to the Tiger’s reflector arm but I opted to drill a hole in it and use a numberplate screw to hold it in place instead.
Is it worth the cost?
Well, I don’t know? I only paid around a tenner for mine. It helps some but as others here have said nothing is really going to stop all that spray coming up off the rear tyre.
If you like crafting and are handy with scissors and a knife you could probably fashion something entirely from some rubber sheet yourself for less.
Attached some pics 1 as originally fitted and 2 as it is now with the added rubber.

