Lee Dutton Posted December 13, 2020 Report Share Posted December 13, 2020 HI all, I have been having some trouble tuning the carbs on my 4a, it only seems to run OK if the mixture is rich. I would like to have light brown plugs but they always end up black ! The engine is standard now but it did have a high lift cam fitted at one stage, so I am suspicious that the needles may have been changed. How can I tell what needles are fitted? what are the part number for standard needles? Many thanks for any help Best regards Lee Quote Link to post Share on other sites
ctc77965o Posted December 13, 2020 Report Share Posted December 13, 2020 Standard needle is TW http://sucarb.co.uk/carbspec/carburettor/essentials/id/2391/ Quote Link to post Share on other sites
Lee Dutton Posted December 14, 2020 Author Report Share Posted December 14, 2020 Cheers Dave, Quote Link to post Share on other sites
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