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lean condition

  1. Two Strokes
    hi guys, i have a problem.. my bike is KTM sx 250 2013.. im new to 2 strokes and jetting.. and my spark plug fails, when i look at the sparkplug it seems it runs a little bit lean.. and it last 3 hours.. then the bike dies and wont start.. it isnt real black its lightcolored. When i check for...