Given my running problems last time I went out I decided to strip and clean the carb. I don’t know much about SU carbs, but it was fairly obvious. I was surprised to find it had no real “jets” like you find in a Solex or motorcycle carbs. It seems to rely totally on the mixture needle. Any way I cleaned it out and filled it with oil.
It had a homemade filter on it which I decided to junk and replace with my own design/ bodge

Then I have used a couple of other rain gutter elbows and some rain gutter to make a breather pipe. I have suck a boy racer stile(cheep

Pipe work/Carb in place.
Lastly I put the “colour tune” on to try and tune the carb (without the inlet pipe work in place). I had got the Screw that moves the needle surround backed all the way off (lean mixture), the throttle butterfly all the way closed. The mixture still seemed to be rich. I backed off the large air bleed screw as much as I could (without taking it out), but I was not able to get a decent blue flame. The mixture still seemed to be too rich. Anybody got any ideas what I need to do to get it better






