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Other Honda Mini Trails
CT90, CT110, ST70, ST90 Discussion
New kid on the block, 1971 CT90 survivor.
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<blockquote data-quote="-Nate" data-source="post: 202422" data-attributes="member: 17572"><p>Actually, the high altitude button <strong><em>leans</em></strong> out the mixture as there's less oxygen at higher altitudes .</p><p></p><p>You'll normally find the button won't stay out due to a weak spring .</p><p></p><p>Looking at the alternator rotor you'll see three marks :</p><p></p><p>"<strong>T</strong>" for <strong>T</strong>op <strong>D</strong>ead <strong>C</strong>enter, used to set the valves and make sure the cam is properly timed when you replace the (usually worn out and stretched) timing chain .</p><p></p><p>"<strong>F</strong>" for <strong>F</strong>iring point, this is the static ignition timing mark .</p><p></p><p>Many use the "<strong>T</strong>" mark and have slightly retarded ignition timing this will make the engine so easy to start but robs power above idle .</p><p></p><p>The third timing mark is a pair of parallel hash mars, this is the full advance timing point and should be used to set the ignition timing with the engine running about 3,000 RPM .</p><p></p><p>Typically if you set the timing at idle the "<strong>F</strong>" mark will drift around a little bit, this is okay, getting the engine to idle below 700 RPM will settle it enough to adjust, when done the engine should idle when hot right at 1,000 RPM .</p><p></p><p>The next time the carby is off, take a look at the main jet, it should be at least a #70 .</p><p></p><p>I've forgotten the hose marks on the carby, I *think* the "<strong>O</strong>" mark is the reserve one .</p></blockquote><p></p>
[QUOTE="-Nate, post: 202422, member: 17572"] Actually, the high altitude button [B][I]leans[/I][/B] out the mixture as there's less oxygen at higher altitudes . You'll normally find the button won't stay out due to a weak spring . Looking at the alternator rotor you'll see three marks : "[B]T[/B]" for [B]T[/B]op [B]D[/B]ead [B]C[/B]enter, used to set the valves and make sure the cam is properly timed when you replace the (usually worn out and stretched) timing chain . "[B]F[/B]" for [B]F[/B]iring point, this is the static ignition timing mark . Many use the "[B]T[/B]" mark and have slightly retarded ignition timing this will make the engine so easy to start but robs power above idle . The third timing mark is a pair of parallel hash mars, this is the full advance timing point and should be used to set the ignition timing with the engine running about 3,000 RPM . Typically if you set the timing at idle the "[B]F[/B]" mark will drift around a little bit, this is okay, getting the engine to idle below 700 RPM will settle it enough to adjust, when done the engine should idle when hot right at 1,000 RPM . The next time the carby is off, take a look at the main jet, it should be at least a #70 . I've forgotten the hose marks on the carby, I *think* the "[B]O[/B]" mark is the reserve one . [/QUOTE]
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Other Honda Mini Trails
CT90, CT110, ST70, ST90 Discussion
New kid on the block, 1971 CT90 survivor.
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