Hi, I have a 1980 Honda CB750C with a kei-hin carburetor. I'm rejetting it right now and I wanted to raise the needle jet so the bike would run richer in the midrange since it's currently running lean there. So I opened the carbs up and took the needle jet out, but I found out that it's completely smooth. There's no grooves at the top. How would I adjust it? Do I need spacers to raise it?
Here's an album with a few pictures of it: https://imgur.com/a/nQE2fBF
The needle also says 53E on it.
Here's an album with a few pictures of it: https://imgur.com/a/nQE2fBF
The needle also says 53E on it.
