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guys, i'm pretty confused... ...i've read many differing opinions on this subject...some say TBS needles, no shims...some say shim the TBS needles cuz they're too long...some say use Thruxton needles, and others say the bike'll run too rich...can i get some feedback from guys that are using TBS needles w or w/o shims? also, while i'm at it...what about vaccuum port drilling? i thought i'd do that at the same time, but want to make sure there's a definite benefit to it. any probs encountered by those that have done it? btw, i use the term guys in a non-gender specific way...



I have your identical setup, except for Specialty Spares pipes. I installed the TBS needles, no shims and noticed zero change in throttle response. On the other hand, I had zero response problems, so not sure what I hoped to gain (OK, I'm a hopeless tinkerer!).
I might fiddle around with adding a shim or two.
So the TBS needles caused no problems, but was really a waste of 15 minutes and $15 to this point.

Al