Chris I don't know about DJ needles but years ago SU carbs on mini et al the needles changed measurable section every 1/16th" or every 0.0625". No relevance I know but could be similar.
SU carbs on Minis...shagged out in 2000 miles....worn butterfly spindles and bushes. But I did like the H4s (or was it HS4) on my TR4 and TR4A....Nope HS6 2"" bore AL
Thanks all - looks like will have to be trial and error as usual. Looking at people's experience with Dynojet needles in general (ok, so it's only the hinternet :biggrin throws up many contradictions - some people going back to stock settings after finding no noticeable improvements. Not a lot of air movement under an Elefant tank compared to Monster/SS and a load more work to remove tank to gain access.
I found DJ vague when it came to the springs.........as mentioned I have two DJ sets both Stage 2, one for a 750 one for a 900. Spring lengths are different with the 900 ones 12mm longer than the 750 ones........DJ say spring lengths should be the same. Albeit I had some carburation problems (may not even have been carb issues) I changed the springs over but I couldn't see, hear or find any real difference in performance etc. AL
