The current setup on my 03 TBA is - AI removed, Bub Slash Cuts, 130 Mains and UniFilter. I have TBS needles but haven't installed them. My bike backfires a little, but not a lot. I do keep an eye on the rubber caps which have cracked and created a poor seal in the past. I will soon take my bike in for the major service that includes the valve adjustment. I plan to have the shop install the TBS needles while they have her apart. My question is - should I replace the 130 main jets with 140's at the same time?
