Regarding the tail - That particular Ducati tail is perfect for the 1WG 400. The bracket on the rear of the subframe almost looks as if it was made for it. The length is great also. I had kind of planned on going that route myself for my 400 hybrid build but ended up getting a good deal on a complete R6 tail instead.
First mod to make: Suspension Second mod to make: Suspension. Stock is junk, and this is the highest bang for the buck upgrade you can make. Lots of options here, search the history of the board for tons of info.
If you are going to change the filter and exhaust, do it all at once and book some time at your local dyno and get the jetting done right the first time. This will save you much aggravation. As you are in the UK, there are Keihin pumper carbs floating around there and are a huge plus. Again, best done at the same time as the other mods to make sure the system is balanced from the get-go. (You may already know this, but so many do not.)
Another common upgrade is fitting R6 brakes and master cylinder. The clampers themselves are not that big of an improvement, but the MC is.
Good luck with it!
Guys
