motorcycle revs drop quickly when starting up.?

my 2003 gsxr-750 (fuel injected) starts and run really well but when I run it for a bit you can hear the revs drop quickly and than it just stays normally running. only happens when starting up. any suggestions on what the issue might be?

Thank You

7 Answers

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  • adam
    Lv 4
    2 months ago

    thats what a normal EFI Motorcycle does you have no issue . There is no manual choke. It will do that on cold start.

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  • 2 months ago

    So what's the reason you're telling us about a normal cold start on a fuel injected motor?

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  • Anonymous
    2 months ago

    It is the fuel-injected equivalent of the choke. It is doing what it should.

  • Anonymous
    2 months ago

    Bike is 17 years old.  Leave it alone.  Worry about it when the bike will not start or stalls when idling.  A bike mechanic will likely charge you 2 hours labor plus parts and then say he cannot see anything wrong with your bike.

    • warlooker2 months agoReport

      thank you that really helps

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  • 2 months ago

    You are complaining about it not stalling? What are you complaining about? Hazya checked the fuel filter and fuel pressure? Blocked tank vent? Any maintenance on the injectors? Sensors and connections to 'em: fuel pressure; ambient pressure; temperature; humidity; engine vacuum; oxygen? Any error codes? You gotta manual? Ever gap your plugs? What do the electrodes look like? So many questions, so few facts.

    • warlooker2 months agoReport

      thank you for the reply

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  • JetDoc
    Lv 7
    2 months ago

    This is NORMAL! There is an enrichment circuit for start-up that makes the engine idle faster. Once the engine warms to near normal operating temp, the enrichment circuit closes and idle speed decreases.

  • arther
    Lv 5
    2 months ago

    after cleaning the fuel filter if its still doing look for a vacuum leak some where ? a general service will probably make it go away if you haven't touched it for a long time

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