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Sportbikes & Sport-tourers Got a supersport, sport-tourer or streetbike? If you prefer the twisties to the open road, this is the place to talk about it!

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Old 07-25-2005, 04:01 PM   #1 (permalink)
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Join Date: Jul 2005
Posts: 1
Default bike won't run under 4000 RPM

I have a '98 Katana 600 that hasn't been run for a couple of years. I can start it just fine with the choke on, but I have to leave the choke on halfway until I am over 4000 RPM. If I even touch the throttle under 4000 the bike dies. When I head down the road and get over 4000 RPM, I can shut off the choke and run the bike without any problem until I need to slow down, then I have to turn the choke back on the keep it from dying. I drained the fuel tank and put in new fuel. It also doesn't make any difference if the bike is warmed up or not.

Thank in advance,
John