brian-nz Posted March 15, 2021 Report Share Posted March 15, 2021 Hi all This no doubt has been mentioned in previous posts but can't find the answer. My TR3 is currently running HS5 carbs which from the tag are from a 1976 Triumph 2000. They have always run rich even though I have changed needles to TR3 ones (SM0 I have just rebuilt engine and increased from 83mm to 87mm pistons and liners. No amount of adjustment seems to be working and continues to run rich Do I need to change needle size again Regards Brian Quote Link to post Share on other sites
Lebro Posted March 15, 2021 Report Share Posted March 15, 2021 Not heard of HS5, I'm assuming you mean HS6 (1 3/4" choke size) Are the needles at the correct height in the pistons is the jet centralised Is the float level correct Do the chokes return to the fully up position Bob. Quote Link to post Share on other sites
Ian Vincent Posted March 15, 2021 Report Share Posted March 15, 2021 You need red springs and try TW needles if your current ones are too rich. Mine are SY and seem to work. Rgds Ian Quote Link to post Share on other sites
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