I know if I search their are tons of threads, and I dug around for an hour. Afrerwards not really feeling much better about how my bike is tuned.
I have tuned other tomos bikes with great success. I had an a55 with a cheaper pipe and airbox mod (snorkle cut off and bored) and it pulled so hard in the 2nd gear power band right to 43ish mph. Even had an a3 that was WAY faster than this a55 with just pipe intake and jet.
The bike i am tuning now is a 2018 tomos racing tt, it has the airbox mod, mlm Cali pipe, and 38 original miles. No air leaks or anything like that, and everything is installed correctly.
So after doing the pipe and airbox mod, I went from 25 idle to 30 idle jet, second from top on needle clip moved to second from bottom, and from 54 main jet to a 68 (as a rich starting point). Was slow, 4 stroked around 25mph. I moved down to a 66 and was still slow, moved down to a 64 and also moved needle to center slot and still no power band in 2nd. Moved to a 62, then 60, and at that point it still seemed very rich, plug was brown in center but black around all edges. I wanted to put in a 58, but I found that was the only one I was missing, so I had to go with a 56 jet. I was worried it would be too lean, but it was still slow, a little more of a tug in 2nd but nothing crazy, maybe a mph or two over stock vs being slower than stock. Also after a 5 minute hard ride, plug was a deep brown all throughout the center right to the base of the ceramic. And black around the inner metal edges.
Now as a reminder, stock was a 54, now I'm running a 56,do you guys think the jump was too far and I should order a 57, 58 and 59 jet. Or is it really possible this was jetted a bit rich from the factory, to the point I'd need stock size jet with a pipe? I'll add a pic of the plug when I can.
