You haven’t indicated what modifications you have done to your engine or what bike you have.
The T-Mod for CV carbs is nothing but a gimmick that theoretically makes massive improvements. A total waste of money.
Get the jetting right first.
Assuming that you have added SE air cleaner and after market mufflers, there are three things you need to do to your carb:
1.Adjust the idle mixture screw out another ½ turn (2 turns total). To do this you need to drill the cap off the idle mixture screw so you can open it up.
2. Replace the #42 slow (pilot) jet with a #45 to cure any off-idle stumbles or backfires,
3. Change the main jet a size one or two larger to offset the leanness created by the free flowing intake and exhausts. If you have changed both intake and exhaust, A #180 jet size should work
Keep