Nasty vibration
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Thread: Nasty vibration

  1. #1
    Save water, ride oil cool Array PeteDawg's Avatar
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    Nasty vibration

    just put a new front end on my 89 gixxer and when deccelerating from 4.5-3.5 k rpm in 4th 5th or 6th gear there is an nasty tank slapper like vibration through the front end. It only happens at that engine speed in those gears. Could it be my front tire is not ballanced. Also the forks sit a little lower in the triples than my old forks which means less wieght on the front end, would this affect anything. Any help would be appricated.
    if some is good, more is better, then too much is just enough.

    I'm not Fast...your just Slow

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  3. #2
    this is my...boomstick! Array CrotchetyRocket's Avatar
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    Try adjusting tire pressures some. This is fairly common, especially if the rubber is worn.

    However, with modified stuff, it becomes a total crapshoot though, and you have to go through every system for flaws.

    Crotch

  4. #3
    Save water, ride oil cool Array PeteDawg's Avatar
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    thanks man i will. More shakedown runs are in order.
    if some is good, more is better, then too much is just enough.

    I'm not Fast...your just Slow

  5. #4
    this is my...boomstick! Array CrotchetyRocket's Avatar
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    Har har...shakedown runs, har har!

    Crotch

  6. #5
    Moderator Array TeeTee's Avatar
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    A new front end of WHAT? I assume it's a Gixxer front end but do you know what year it's from and the rake and trail specs for that year? Do they match YOUR model year bike?

    It can also be tire tread condition, pressures as CR said, or perhaps you put the front end together with a little bit of misalignment in the forks so there's extra sticktion that's binding and causing some problems at those speeds. There's so many possibilities.

    Or maybe your main frame is bent from the crash that wiped out your original front end?
    A backyard mechanic without a service manual is just like a hooker without a lamp pole.... they are both in the dark.

  7. #6
    Save water, ride oil cool Array PeteDawg's Avatar
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    whew turned out just to be tire pressure. my bike is not that big of a peice after all. No more vibrations. I'm suprised how simple these old bikes are put together. Thanks for your help gentlemen.
    if some is good, more is better, then too much is just enough.

    I'm not Fast...your just Slow

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