i just installed them on the 05 speedy and i can't help wondering why i got no benefits over the stock needles with one shim. I tried the TBS also with one, then 2. With one the midrange wan't quite as strong as stock and with 2 it was about the same, tho possibly still less. So i may go back to stock. This is with UNI filter, drilled filter/airbox bottom, snorkel removed and 130 mains, tho i just now put in 125's which helped the top a bit but of course had no effect on midrange. The 130's were a bit rich i think.
I noticed 2 things about the TBS compared to stock....they were longer and the taper seemed thinner, but very very slightly to the point where it was visually hard to see. I'm thinking the extra length is the reason for the less than spectacular performance. Thats whay i added 2 shims. But thats not nearly enough to shorten them compared to the stock needles with one shim so i wonder if i need maybe 4 shims. But i never heard of anyone using that many. These are .5mm shims by the way. heres my theory as to why i didn't see the improvmant so many here have cited.The 05 speedy has NBZY needles while the pre 05's have NBAD. Could it be my stock needles were already much closer to the richness the TBS give than the pre 05 speedy's needles? Or if not, what are your thoughts on this situation?
