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YT125

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  1. YT125

    Does humidity affects the way an engine runs?

    YT125 replied to YT125's topic in The Bar
    Thanks everyone
  2. YT125

    Does humidity affects the way an engine runs?

    YT125 posted a topic in The Bar
    Hi all. Does humidity affect our engines? The reason I ask is I have a Yamaha YT125 Tri-Moto (DT125 engine just detuned a bit) and I've noticed on humid days that it runs a bit different. The humidity has been between 70-80% for the last month so. When it is humid it doesn't like to idle and will only start if the throttle is slightly cracked open, and above 3/4 throttle it likes to cut out and just doesn't seem to have the power it usually does. On a non humid day it day it will start right up and idle all day, and doesn't cut out above 3/4 throttle. At full throttle on a humid day I can hear it struggling to suck air. It's all stock running the factory air box and filter with a Mikuni VM20SS #25 pilot jet #200 main jet. If anybody has any ideas it would be great. Thanks

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