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  • I’m not sure if something is missing..

    I just Bought a 01 Yamaha Road star Silverado as I was looking to bike over I noticed this I am not sure if I am missing something off the bike. Could somebody give me some information ..

  • #2
    Some of the Air Injection System (AIS) has been removed. Most folks remove all of it. Show us a photo of the entire left side of the engine so we can see if the necessary tubes have been capped off as they should to properly eliminate the AIS.

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    • #3

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      • #4


        Looks like the tubing is still there, but rather than remove it and cap it at the heads someone my have capped it elsewhere. Does it run? Search the tech articles on this site for “AIS Removal”. The AIS injects fresh air into the exhaust after the valves to burn excess fuel in the pipes on deceleration. It’s an EPA thing. Causes backfiring with after market exhaust.

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        • #5
          It’s AIS filter is missing...

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