You are reading a single comment by @EB and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported exclusively by donations. Consider donating a small amount regularly.
@EB
I think it controls overall mix but jets do it over the range, so needle valve to pilot jet to main jet (from rusty memory)