SV650.org - SV650 & Gladius 650 Forum

You are of course free to tune your carbs in any order that you wish.
Removing the main jets entirely won't change the idle mixture. Removing the needles as well still won't change the idle mixture. This is because the idle circuit is the only circuit operating at closed throttle.
In similar fashion, removing the main jets won't affect the mid-range, since fuel flowing through the main jets goes next to the needle/jet combination, where it's flow is reduced the necessary amount to provide proper part throttle mixture. It's pretty simple, and seems quite clear. When the needle and it's complementary jet are controlling the mixture, all it needs is for the main jet to provide an adequate amount of fuel for that throttle setting. To the needle and it's orifice, there is no such thing as too large of a main jet. At 1/2 throttle, you aren't using nearly all the fuel provided by a 137.5 main jet, and the needle/jet will still meter the same amount of fuel if you change the main to a 160.

Start with the idle adjustment, because it will affect both mid-range and full throttle operation.
Then adjust the mid-range.
Lastly, change main jets as required.