I am currently running Thruxton needles with no shims,Epcos,K&N filter and bell-mouth( no idea what jets are in it,I bought it used and it was re jetted at that time). It runs well but I am trying to get a little better mileage without losing performance. I just got a set of TBS needles to try and wondered what shims (if any) others are using(as a starting point).
Thoughts?
