Originally Posted by kenlani
Hi all, I finished my 49cc install, having a ball with my bike but need advice
Im at 5700 feet altitude and think Im gonna have to do some jet work so I have a couple questions;
---when I replace the main jet (I'm going smaller) do I have to replace the needle too?
---how much of a gap should the slide in the carburetor have at closed throttle (idle)?Thanks all for the help
1) You wont have to "replace" the needle, just adjust up or down probably......
2) I dont believe there is a standard measurement, whatever it takes to feed enough air to the fuel for idle.....