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Technical
Jetting/tuning issue
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<blockquote data-quote="Todster" data-source="post: 497503" data-attributes="member: 10931"><p>Hi,</p><p>I've just changed my carb for a pair of EMPI HMPX 40s, (copy of the weber IDF40) as standard they came with 52 idles and 115 mains, they went on a 1641. I had similar issues to you in that they were popping and had a fairly hefty flat spot around 2K RPM. The first thing I did was change the mains to 125s. Completely changed the running, the flat spot is now only just noticeable, just off idle and as soon as it goes through around 1200 RPM, it pulls clean through.</p><p>I've got a set of 55s to try as idles, but as of yet have not got them in. </p><p></p><p>Good luck, I have found that they are a joy to work on.</p><p></p><p>Cheers </p><p>Mark</p></blockquote><p></p>
[QUOTE="Todster, post: 497503, member: 10931"] Hi, I've just changed my carb for a pair of EMPI HMPX 40s, (copy of the weber IDF40) as standard they came with 52 idles and 115 mains, they went on a 1641. I had similar issues to you in that they were popping and had a fairly hefty flat spot around 2K RPM. The first thing I did was change the mains to 125s. Completely changed the running, the flat spot is now only just noticeable, just off idle and as soon as it goes through around 1200 RPM, it pulls clean through. I've got a set of 55s to try as idles, but as of yet have not got them in. Good luck, I have found that they are a joy to work on. Cheers Mark [/QUOTE]
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Technical
Jetting/tuning issue
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