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Other Honda Mini Trails
CT90, CT110, ST70, ST90 Discussion
1972 CT90 idles fine, runs bad at higher rpm
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<blockquote data-quote="MikeCT90" data-source="post: 171938" data-attributes="member: 10601"><p>I agree with the other that you want to make sure you're spark advancer is clean and can operate freely. If you do takes yours off to clean it and are not sure you are getting it back together correctly then feel free to take a look at a post I made on my CT90 blog on how to reassemble spark advancers. He is a link to the post: <a href="https://ct90restoration.blogspot.com/2017/10/ct90-spark-advancer-assembly-build-up.html" target="_blank">https://ct90restoration.blogspot.com/2017/10/ct90-spark-advancer-assembly-build-up.html</a></p><p></p><p>There is also a possibility that maybe you're running a little rich and it might help to raise the clip one notch on the needle in the slide in your carb to lean it out a bit mid throttle. Here is a link to a post I did on carb adjustments that might be helpful: <a href="https://ct90restoration.blogspot.com/2017/10/adjusting-and-jetting-ct90-carb.html" target="_blank">https://ct90restoration.blogspot.com/2017/10/adjusting-and-jetting-ct90-carb.html</a></p><p></p><p>Mike</p></blockquote><p></p>
[QUOTE="MikeCT90, post: 171938, member: 10601"] I agree with the other that you want to make sure you're spark advancer is clean and can operate freely. If you do takes yours off to clean it and are not sure you are getting it back together correctly then feel free to take a look at a post I made on my CT90 blog on how to reassemble spark advancers. He is a link to the post: [URL]https://ct90restoration.blogspot.com/2017/10/ct90-spark-advancer-assembly-build-up.html[/URL] There is also a possibility that maybe you're running a little rich and it might help to raise the clip one notch on the needle in the slide in your carb to lean it out a bit mid throttle. Here is a link to a post I did on carb adjustments that might be helpful: [URL]https://ct90restoration.blogspot.com/2017/10/adjusting-and-jetting-ct90-carb.html[/URL] Mike [/QUOTE]
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Other Honda Mini Trails
CT90, CT110, ST70, ST90 Discussion
1972 CT90 idles fine, runs bad at higher rpm
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