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Hesitation in mid- to upper- RPMs

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  • J. Kidd
    started a topic Hesitation in mid- to upper- RPMs

    Hesitation in mid- to upper- RPMs

    I noticed I'm getting a hesitation in 5th or 6th gear at highway speeds when I go FOT. I don't notice it at lower gears and I'm guessing that's because the torque of the lower gears is carrying it through. My two guesses would be fuel or spark issues. I plan on throwing in some fuel injector cleaner (Chevron Techron) to see if that clears it up in case the carbs are a little gummed up. My next step would be to change my plugs - they're over 7k miles and probably due anyway.

    Has anybody experienced this and if so, are there other areas I should be checking?

    Next: I haven't checked my Clymer manual yet but what's involved in changing the plugs (ie. do I have to remove the tank)?

    Thanks for any help.

  • The CyberPoet
    replied
    Originally posted by J. Kidd
    I'll run some injector cleaner first and then when its warmer I'll swap the plugs.

    Any other maintenance things I should/could do while I'll have the tank off?
    The obvious ones are:

    Valve adjustment
    Carb cleaning
    Carb Syncing (as MD86 said)
    JetKit if you want to install one
    Checking the valve cover gaskets for leaks & replacing as necessary
    Cleaning up and smearing dielectric grease on the coil connections.

    Cheers
    =-= The CyberPoet

    Leave a comment:


  • md86
    replied
    You know , I had the exact same problem a few months back whilst I was experimenting with jetting . I put in one size larger mains and it went away . I'm not saying that that's what YOUR problem is , but .... Have you messed with your jetting or anything that would effect that lately ? When's the last time you synched the carbs , or have you messed with them lately ? Lots of people say they have a hesitation and synching makes it go away . Just some ideas ....

    Leave a comment:


  • J. Kidd
    replied
    I'm sorry - my bike info used to be in my sig at 'the Planet'...

    It's '96 Katana 600. I have a K&N air filter, Factory 5 Degree Ignition advancer, and I run Mobil 1 MX4T Synthetic Oil in it. Other than that, she's stock.

    I didn't notice this last season before she went in for winter and for most of November, December and January I was able to ride about once a week (on average). Let January and all of February have been tough (too cold or too snowy).

    I guess I notice it mostly cruising in 6th gear at about 6000-6500 rpms. If I go WOT at that point, I get a couple second hesitation and then she catches and goes. I also might be down on power overall but I've been attributing that to me getting more used to the bike. However, if there is a high-end miss or the carbs are a little choked, she probably is down on power.

    I'll run some injector cleaner first and then when its warmer I'll swap the plugs.

    Any other maintenance things I should/could do while I'll have the tank off?

    Leave a comment:


  • trinc
    replied
    welcome,

    yes, you have to remove the tank.

    it would be good to know what rpm range your riding at just before going WOT. i'd do both - a little fuel cleaner AND change the plugs.

    but more knowledge about the bike would help - jetted ?


    tim

    Leave a comment:

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