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techtalk:evo:carb02 [2020/01/12 20:04] ixl2relax [The Idle/Transfer Ports Operation & Tuning] |
techtalk:evo:carb02 [2020/01/22 05:54] ixl2relax [Diagnosing CV Carb Issues] |
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| This is from an [[http://xlforum.net/forums/showthread.php?t=30748|XLForum thread]]: chrishajer wrote - CBAS5 and I were talking about what it should sound like, good, and we filmed that one. Then he said "you know, we should show a bad one too" so we did that. I think the [vacuum] sound and the speed that the slide comes down are the two most important things. Those things you can't describe to someone really. I can't anyway. But it's absolutely the best way to verify that the diaphragm is seated properly. | This is from an [[http://xlforum.net/forums/showthread.php?t=30748|XLForum thread]]: chrishajer wrote - CBAS5 and I were talking about what it should sound like, good, and we filmed that one. Then he said "you know, we should show a bad one too" so we did that. I think the [vacuum] sound and the speed that the slide comes down are the two most important things. Those things you can't describe to someone really. I can't anyway. But it's absolutely the best way to verify that the diaphragm is seated properly. | ||
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| + | ** Youtube Videos of:\\ | ||
| <font 16px/Arial, , ;;#ffffff;;#00FFF0> | <font 16px/Arial, , ;;#ffffff;;#00FFF0> | ||
| - | [[http://www.youtube.com/watch?v=L4knwjlNC1o|YouTube Video of GOOD working slide]]</font> ......... | + | [[http://www.youtube.com/watch?v=L4knwjlNC1o|The Sound of a GOOD working slide]]</font> ......... |
| <font 16px/Arial, , ;;#ffffff;;#FFFF00> | <font 16px/Arial, , ;;#ffffff;;#FFFF00> | ||
| - | [[http://www.youtube.com/watch?v=k1YOkoekIeA|YouTube Video of MALFUNCTIONING slide]]</font>\\ | + | [[http://www.youtube.com/watch?v=k1YOkoekIeA|The Sound of a MALFUNCTIONING slide]]</font>** |
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| **Aftermarket Parts** are promoted as upgrades to peak the carb performance. Sometimes they do create better performance for one part of the carb operation. But most often, they simply distort the proper overall performance and create ongoing issues that are difficult or impossible to resolve. If you're racing, the setup for normal street operation may be irrelevant, but for most riders, getting good performance in all conditions is important. Keep this in mind when evaluating any promises of upgrade products. | **Aftermarket Parts** are promoted as upgrades to peak the carb performance. Sometimes they do create better performance for one part of the carb operation. But most often, they simply distort the proper overall performance and create ongoing issues that are difficult or impossible to resolve. If you're racing, the setup for normal street operation may be irrelevant, but for most riders, getting good performance in all conditions is important. Keep this in mind when evaluating any promises of upgrade products. | ||
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| {{ :techtalk:evo:carb:cv40-needle-em-jets.jpg?360| Photo by IXL2Relax at the XLForum}} | {{ :techtalk:evo:carb:cv40-needle-em-jets.jpg?360| Photo by IXL2Relax at the XLForum}} | ||
| The "DynoJet" kits (and many equivalent ones) can be an issue. Typically, they replace the factory needle, emulsion tube, main jet & diaphragm/slide spring. They also recommend that you drill the slide vacuum hole out for quicker throttle response. The DynoJet emulsion tube and main jets are not compatible with the Keihin emulsion tube/jets - they use different threads. There are even FAKE Dynojet kits that have shown up on the market, presumably from China ((Fake DJ Kit - https://www.dynojet.com/warnings/PressReleaseKnockOffJetKits.pdf)) | The "DynoJet" kits (and many equivalent ones) can be an issue. Typically, they replace the factory needle, emulsion tube, main jet & diaphragm/slide spring. They also recommend that you drill the slide vacuum hole out for quicker throttle response. The DynoJet emulsion tube and main jets are not compatible with the Keihin emulsion tube/jets - they use different threads. There are even FAKE Dynojet kits that have shown up on the market, presumably from China ((Fake DJ Kit - https://www.dynojet.com/warnings/PressReleaseKnockOffJetKits.pdf)) | ||
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| + | More info & links here: [[:techtalk:evo:carb02c|SubDoc - Why Not Dynojet Kits?]] | ||
| **__To check for DynoJet parts, look at these 4 things:__** ((Identify DJ vs Keihin - http://xlforum.net/forums/showpost.php?p=5238545)) | **__To check for DynoJet parts, look at these 4 things:__** ((Identify DJ vs Keihin - http://xlforum.net/forums/showpost.php?p=5238545)) | ||
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| While some people have had satisfactory results with the DJ kits, if you are having trouble getting a good tune on the carb, remove all DJ items and restore the carb to Keihin parts including buying another slide if it's been drilled. The stock parts are good quality and will provide excellent operation if the carb is tuned properly. ((the opinion of many on the XLForum)) | While some people have had satisfactory results with the DJ kits, if you are having trouble getting a good tune on the carb, remove all DJ items and restore the carb to Keihin parts including buying another slide if it's been drilled. The stock parts are good quality and will provide excellent operation if the carb is tuned properly. ((the opinion of many on the XLForum)) | ||
| - | More info & links here: [[:techtalk:evo:carb02c|SubDoc - Why Not Dynojet Kits?]] | + | \\ |
| From the factory, there is a cap over the Idle Mixture Screw. This needs to be removed to make IMS adjustments during tuning. It does not need to be replaced when done, but the cap is available as HD P/N 28015-01 if you would like to replace it when done making changes.((IMS Cap - http://xlforum.net/forums/showpost.php?p=595622&postcount=9)) | From the factory, there is a cap over the Idle Mixture Screw. This needs to be removed to make IMS adjustments during tuning. It does not need to be replaced when done, but the cap is available as HD P/N 28015-01 if you would like to replace it when done making changes.((IMS Cap - http://xlforum.net/forums/showpost.php?p=595622&postcount=9)) | ||
