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Power Loss at 100mph

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  • Power Loss at 100mph

    So I've just got the bike running to its potential. Its a 1998 GSX750F Katana, I rebuilt the carbs and dipped them. Idle screws at 2.5 turns and everything is stock including exhaust and airbox.
    My issue is at 100mpg in 5th or 6th gear I start losing power big time. When I slow down its recovers fine, but I slowed down rapidly once and held the clutch in and it died like it was out of gas. But it starts up fine after that.
    I had a similar issue once and it wouldnt go over 70mph and I found a big vacuum leak that helped, but now here I am stuck at 100mph haha, any ideas on what it could be?

  • #2
    Likely a fuel line warming up, getting soft, and kinking.

    It's usually a fueling issue, so could also be other things like the float height being off, or fuel filter being partially clogged, or the petcock getting gummed up
    1998 Katana 750
    1992 Katana 1100
    2006 Ninja 250

    2006 Katana 600 RIP - 130k miles


    • #3
      I don't know if your particular bike has a governor on it or not. That can surely slow your speed, especially in some states. Those boys are pretty hefty sometimes.

      *(couldn't help myself...carry on) (without governor if possible)

      "A knight proves his worthiness by his deeds."