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<blockquote data-quote="Rednaxs60" data-source="post: 227141" data-attributes="member: 4617">Once you get an understanding of the Speeduino, gets easier.EarlyGWCollector - The &#039;84 and &#039;87 carb bikes are totally different from the &#039;85/&#039;86 fuel injected models.&nbsp; I&#039;m woking on replacing a component of the computerized fuel injection (CFI) system, just happens to be the ECU.&nbsp; I am doing fuel and ignition together.&nbsp; A lot of people would only do one or the other, get the one being changed working correctly, then move on to another aspect, maybe not.In your case fuel is what it is - carbs.&nbsp; The ignition aspect can be taken care of with a new CDI unit, enter the Speeduino or suitable alternative.&nbsp; Don&#039;t know how you would do it, take some research and reading.&nbsp; Definitely a possibility.&nbsp; Had an epiphany in the early morning hours.&nbsp; I cannot adjust the timing with the existing OEM system.&nbsp; No way to change the ECU programming.&nbsp; I have had an issue with vacuum since I bought my &#039;85 Limited Edition.&nbsp; The engine vacuum has never been above 10 in of HG at idle.&nbsp; The vacuum gauge indicates that this may be caused by vacuum leaks - the vacuum system is tight, use starting fluid to troubleshoot, or timing is off.&nbsp; Will be able to tweak the engine timing with the Speeduino.</blockquote>

[QUOTE="Rednaxs60, post: 227141, member: 4617"] Once you get an understanding of the Speeduino, gets easier. EarlyGWCollector - The '84 and '87 carb bikes are totally different from the '85/'86 fuel injected models. I'm woking on replacing a component of the computerized fuel injection (CFI) system, just happens to be the ECU. I am doing fuel and ignition together. A lot of people would only do one or the other, get the one being changed working correctly, then move on to another aspect, maybe not. In your case fuel is what it is - carbs. The ignition aspect can be taken care of with a new CDI unit, enter the Speeduino or suitable alternative. Don't know how you would do it, take some research and reading. Definitely a possibility. Had an epiphany in the early morning hours. I cannot adjust the timing with the existing OEM system. No way to change the ECU programming. I have had an issue with vacuum since I bought my '85 Limited Edition. The engine vacuum has never been above 10 in of HG at idle. The vacuum gauge indicates that this may be caused by vacuum leaks - the vacuum system is tight, use starting fluid to troubleshoot, or timing is off. Will be able to tweak the engine timing with the Speeduino. [/QUOTE]

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