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80 XS400 high idle

Discussion in 'The Garage' started by mikeasis, Mar 29, 2019.

  1. mikeasis

    mikeasis XS400 Member

    thank you.
    Im wondering if I need to remove these and the mixture screws and blow out those passages again. Are there o-rings that would need to be replaced if I do this?
    Last edited: Apr 14, 2019 at 7:26 PM
  2. Needle and seat can be tested with air usually. I used siphon to pump some air in to ensure it resisted.

    Generally any ring around needle means replacement time. Believe the may be YouTube about a cheap attempt to avoid that by somehow resurfacing needle to renew the surface as a flat angle but that may be temporary fix or a fruitless effort when brand new ones exist on sites like Mike's XS and Amazon.

    Manual is incorrect about float height
    Last edited: Apr 16, 2019 at 8:18 PM
  3. mikeasis

    mikeasis XS400 Member

    Ordered Yamaha needle sets. Ill let you know how it turns out in a few days

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