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Carbs and Fuel System
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post #11 of 52 (permalink) Old 05-16-2020, 02:33 PM
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Not sure, but description of the slide action makes me think, diaphragms. Like an all out leak, make sure they're seated correctly and not damaged.

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post #12 of 52 (permalink) Old 05-16-2020, 02:35 PM Thread Starter
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Not sure, but description of the slide action makes me think, diaphragms. Like an all out leak, make sure they're seated correctly and not damaged.
its the first thing i checked. I have never seen this on any bike ever so im completely stumped
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post #13 of 52 (permalink) Old 05-16-2020, 03:00 PM
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Vibrating slides? Diaphragms good?

Have to think about leaking valves. Do you have a vacuum gauge to get a reading?

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post #14 of 52 (permalink) Old 05-16-2020, 03:10 PM Thread Starter
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Vibrating slides? Diaphragms good?

Have to think about leaking valves. Do you have a vacuum gauge to get a reading?
No thats one thing i dont have. I doubt its the valves as they were lapped during the rebuild. The first time lol. I will have to thinker with it again. I might switch slides and see if that makes a difference. I could have mixed them up when i took them apart. Not sure if that would make a difference or not tho
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post #15 of 52 (permalink) Old 05-16-2020, 03:20 PM
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The difference in slides is the needle on rear is a smaller diameter/taper, to make rear cylinder a touch richer/cooler. Wouldn't want the needles switched.

Valves can still leak if not tested.

The diaphragms are seated on the tab?

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post #16 of 52 (permalink) Old 05-16-2020, 03:42 PM Thread Starter
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Yep the diaphragms are seated. The needles are correct because i checked that this morning. Could a leaky exhaust have something to do with it maybe?
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post #17 of 52 (permalink) Old 05-16-2020, 04:06 PM
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No, shouldn't affect it much.

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post #18 of 52 (permalink) Old 05-16-2020, 04:18 PM Thread Starter
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No, shouldn't affect it much.
ok thanks. So just checked the diaphragms again and both are perfect.
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post #19 of 52 (permalink) Old 05-16-2020, 04:35 PM
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Can you describe what the slides are doing a bit more?

If you can see the slides, they don't usually run well with air filters removed.

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post #20 of 52 (permalink) Old 05-16-2020, 05:31 PM
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it is normal for the slides to be dancing up and down, the pull up on the intake stroke (vacuum generated across the carb venturi due air flow.) more throttle, the higher they pull up, and pull the needles with them.

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