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  1. I

    Mixture Settings and Main Jet Sizing

    Hey guys, long time lurker of the forum. I have a question today about sizing that I have not been able to find a definitive answer for. Bike is a 1978 XS400 Many time I'll read "you have to go up a size" or "go +2 sizes on your main jet" My question is, what exactly is "1 size"? For example...
    • iBoesen
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    • idle screw carb setting pod filter
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    • Forum: The Garage
  2. I

    Waking up the Machine

    Hello All! New to the forum, this is my first post. I am sure you will be seeing more of me in the coming months. Last week I picked up a 1979 XS400 for $400. Bike has so rust but overall it is not too shabby! My main priority right now is to get the motorcycle running before...
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