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FZ S V3 BS-4 jerking issue

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  • #1

    FZ S V3 BS-4 jerking issue

    Hi Team,

    My bike is jerking alot when I decelerate and try to accelerate. I replaced valves, valve seals, air filter, spark plug and rear sprocket damper rubbers. Cleaned fuel pump, fuel injector, ignition coil. But still I see jerking issue.

    Is there any other thing that I need to check?
    Tags: fz s v2, fz s v3, jerking, missing, yamaha
  • #2
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    • #3
      Check for any dirt or carbon buildup in the throttle body. Cleaning it can improve air-fuel mixture.​
      Last edited by avensis; 11-25-2025, 04:06 AM.

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      • #4
        Hi @avensis,
        I have already cleaned the throttle body, fuel injector. Can you tell me if the valves are little tight can it lead to missing problem?

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