Benny,
I currently run with the TBS needlse, Triumph part #T1241024.
I have a set of the Thruxton needles I am going to try if the snow ever melts away.
I Will get the part# tonight when I get home if you want it. The needles are about $6 each so no biggie.
The main difference is the taper on these needles. Our stock needles are basically nails with straight sides and minimal taper to them. The TBS needles are slightly longer but have a very definite taper to them. I ran a dyno and got a minute dip in the 3500-4k range and them put in the TBS needles to eleviate this. It feels way better and actually may be running a tad rich now. I am going to go the big bore route next month whilst laid up for the ice age and will then try the Thruxton needles with that setup. They seem to be a bit slenderer with similar taper compared to the TBS'ers, which appears they will give even more gas. I will keep ya posted to the results after this is all done. I will have to let it break in first then get it dynoed again for poops and grins.
Sigh, only 6 more months of winter here in the great white north. 3' of snow, my snowplow guy coming by everyday now and sometimes twice, -5°F, but hey, the suns actually out today and it's gonna warm up to 9°F by this afternoon! Yahoo, a heat wave, lets go swimming!
