Bonneville America Forums Forums Technical Forums Performance Mods stuttering at 3/4 to full throttle.

If I put in the standard needles would that help?
The stuttering happened before I shimmed the Thruxtons. I haven't tried the Thruxtons on 3/4 throttle yet; maybe I won't now!!
I was trying to make the mixture rich to stop the popping. I thought that adding the shims would help eliminate the popping, as it was still present with the Thruxtons.