Jet needle position - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 07-02-2018, 03:20 PM Thread Starter
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Jet needle position

Hi
Is it correct that the jet needle on a Vulcan A2 1986 have only one position ?

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post #2 of 5 (permalink) Old 07-02-2018, 03:59 PM
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Yes, though they can be adjusted up by using shims

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post #3 of 5 (permalink) Old 07-03-2018, 09:45 AM Thread Starter
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I would like to get a richer mixture so I gues, that the needle most go down?
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post #4 of 5 (permalink) Old 07-03-2018, 10:17 AM
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Quote:
Originally Posted by Preben59 View Post
I would like to get a richer mixture so I gues, that the needle most go down?
Down makes it leaner, because the needle is tapered. Adding a shim lifts it up, makes it richer. The needle reaches the narrow part of the taper sooner. Edit: The narrow part of the needle allows more fuel to flow past, so adding a shim pulls the narrow section higher.
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post #5 of 5 (permalink) Old 07-03-2018, 02:22 PM Thread Starter
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Quote:
Originally Posted by Spockster View Post
Down makes it leaner, because the needle is tapered. Adding a shim lifts it up, makes it richer. The needle reaches the narrow part of the taper sooner. Edit: The narrow part of the needle allows more fuel to flow past, so adding a shim pulls the narrow section higher.
Of course, my mistake. I will do that. Thanks a lot Spockster
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