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  1. KTM 125SX 2003 not hitting powerband paroperly

    New Member Introductions
    KTM 125SX 2003 not hitting powerband properly soo i recently got a full engine rebuild on my ktm 125sx 2003. new crankshaft, bearings, piston, rings etc. when i broke the engine in properly and tried opening it up a bit, it wasnt hitting the powerband correctly. so then took it apart again to...
  2. 125 sx powerband issue?

    Off-Road / Enduro
    Bonjour, Just got back from buying a 2003 125sx it goes ok in the band but doesn't pop up like other 125's I have ridden and I've been told ktm's have a very aggressive powerband and a leading (powerful) engine. Im thinking more towards the powervalve but I am unsure of how to adjust it?!? So...
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