Jump to content
Sign in to follow this  

NOZx, NAFx, and N3Yx series needles

Recommended Posts

Hello, I'm working with the keihin PWK38 for a two stroke. Does anyone know what is different about the NOZx, NAFx, and N3Yx series needles, and how their differences would affect tuning and use? I am aware of the fourth letter designating the straight section diameter and how it affects 0 to 1/8 tuning in conjunction with the pilot and the slide. I’m also aware that the NOZx series needles are known for a rich initial taper that can make jetting 0 to ¼ throttle tricky. I can tell from measuring the NAFx needles that they have a very small tip compared to the other needles, but I’m not sure how that would affect tuning, maybe requiring a smaller main? I know nothing about the N3Yx series. These are the needles I currently have to experiment with, so any information would be greatly helpful. Thanks for any replies.

Edited by rbreak

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×