22-11-2018, 08:50 AM
Michael - do note that my 1.25 SU carb is a full downdraft one (see below) - it will perform very differently to your semi downdraft, so the needle and spring that works for mine may not be so for yours.
![[Image: 17a861df4286b9f4-490ff986d54bc0b9DSC02737.JPG]](http://media.virbcdn.com/cdn_images/resize_1600x1600/c8/17a861df4286b9f4-490ff986d54bc0b9DSC02737.JPG)
Purchase a Gunsons Colortune kit (with the correct adaptor to suit your type of plug) and you will learn how the needle is oporating in your engine, from that you can make decisions about how to improve things.
Purchase a Gunsons Colortune kit (with the correct adaptor to suit your type of plug) and you will learn how the needle is oporating in your engine, from that you can make decisions about how to improve things.