Ok, after my Stage 3 DNA Airbox mod (with a Power Commander and cans), I am looking at doing further modifications now to compliment the DNA Airbox.

What is so good about the DNA Airbox, you don't lose any power or torque anywhere, and the improvements are in a very wide area of revs, right from just above tickover to the rev limiter. This makes it a cracking mod in my books.

(With some mods, you lose power at one end, and gain on the other end; normally the top end of revs).

So, I am looking at a Big Bore, which should give me gains through the rev range, and a Gas Flowed Head.

This should give me a nice and smooth power boost, and I am hoping for a total gain, with my existing mods, of around 10-12hp over a Standard bike.

I have just started this project, it will probably grow and change a bit, and have sourced a second hand barrel, but I am looking for a spare cylinder head. If anyone has one, please pm me, thanks.