Stock GT500 motor with PEI — fully rebuilt. Late model regular-venting carbs stamped 15313.
Have Titan Performance expansion chambers & will use K&N pod filters.
Vapor blasted carbs with new needle jets, 188 P-4. Ordering new jet needles, 5FP17. (both stock sizes)
Stock jets: 97.5 main & 30 pilot.
I found these posts by Titan Performance:
viewtopic.php?f=5&t=12309&p=160200
titan performance wrote:Steve....did I read you are using the early shorter inlet manifolds?
On my 75 T500, I use 115 main...35 pilot, and needle middle notch. The bike runs pretty good everywhere. WOT must be rich enough as I have thrashed it very hard with no ill effect. I'm using pod filters.....
What is the difference between early/short & later/longer inlet manifolds? Does it make a difference?titan performance wrote:No mate.....got the later/longer manifolds on mine.
Needle middle notch is stock.
Based on my prior results, I was thinking of using 107.5 main & 32.5 pilot (up 10 & 2.5, respectively). But that prior experience is with smaller carbs.
Is 115 main & 35 pilot recommended?