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A little loose at high speeds

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  • #1

    A little loose at high speeds

    Decided to blow the cobwebs out for the first time today. I have been taking it easy the first couple hundred miles just becaus it's a 30 year old bike and new to me. It seemed to me she became a little loose at speeds over 80. As I was passing a vehicle and pulling back into my lane there is a bit of a ridge in the middle of the raod and caused some front wheel wooble. Nothing drastic but it cause me to suck up a couple square inch's of seat material into my hind end. So is loose at high speeds something normal or do I need to look into someting. And speaking of speed, I have the dang 85 mph speedo and was wondering if any one knew an approximate speed at 7,000 rpm in 5th gear??

    Tex
    1981 XS1100H


    Quando omni flunkus moritati

    When all else fails, play dead.
    Tags: None
  • #2
    Last time I calculated it out, 7,000 in 5th with the stock FD is about 110 MPH.

    As to the wobble, honestly at those speeds if you hit an edge in the road especially with older or worn skins, it will definitely grab the wheel and give you a little extra weight in your pants.
    Life is what happens while your planning everything else!

    When your work speaks for itself, don't interrupt.

    81 XS1100 Special - Humpty Dumpty
    80 XS1100 Special - Project Resurrection


    Previously owned
    93 GSX600F
    80 XS1100 Special - Ruby
    81 XS1100 Special
    81 CB750 C
    80 CB750 C
    78 XS750

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    • #3
      110 mph!! Sweet, and she even felt like it had a bit more throttle.

      Yeah, I have been thinking of changing tires. They are Metzlers and in good shape but they are 2005's. I am also thinking about a fork brace. Does TopCat (I think thats who made them) still sell them?
      1981 XS1100H


      Quando omni flunkus moritati

      When all else fails, play dead.

      Comment

      • #4
        I'd take a look at the neck bearings; while a tire could possibly cause that, the bearings are a more likely source.

        If they've never been cleaned/repacked/reset, it's probably time. Although it wouldn't hurt to look at the wheel bearings too...

        '78E original owner
        Fast, Cheap, Reliable... Pick any two

        '78E original owner - resto project
        '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
        '82 XJ rebuild project
        '80SG restified, red SOLD
        '79F parts...
        '81H more parts...

        Other current bikes:
        '93 XL1200 Anniversary Sportster 85RWHP
        '86 XL883/1200 Chopper
        '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
        Cage: '13 Mustang GT/CS with a few 'custom' touches
        Yep, can't leave nuthin' alone...

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        • #5
          Greetings Tex,

          tkat is who you are thinking of.

          Here is his website:

          http://www.tkat.com/forkbrace.html

          Rodger
          RIP Whiskers (Shop Boss) 25+yrs

          "It doesn't hurt until you find out no one is looking"

          Everything on hold...

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          • #6
            Just shy of 5000 RPM is 80 mph, after that I stop trying to relate RPM to MPH...

            Since you have 0-85 speedo you probably already knew that thought lol. Some help I am eh?
            Last edited by WMarshy; 06-11-2010, 10:00 PM.
            '79 XS11 F
            Stock except K&N

            '79 XS11 SF
            Stock, no title.

            '84 Chevy K-10 "Big Blue"
            GM 350, Muncie SM465, NP208, GM 10 Bolt with 3.42gears turnin 31x10.5 Baja Claws

            "What they do have is an implacable, unrelenting presence and movement that bespeaks massive power lurking behind paint and chrome. They don't wail like a screeching ninja, the don't rumble like a harley. They just growl like a spactic, stressed out badger waiting to rip your face off and eat your soul." Trainzz~RIP~

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            • #7
              Originally posted by crazy steve View Post
              I'd take a look at the neck bearings; while a tire could possibly cause that, the bearings are a more likely source.

              If they've never been cleaned/repacked/reset, it's probably time. Although it wouldn't hurt to look at the wheel bearings too...

              '78E original owner
              I believe I have checked the neck bearings. In the "what to check on an old bike" section, it mentioned putting on the center stand and jacking up the front and pull up and down on front tire. When I did it was rock solid and swinging the handlebars back and forth was nice and smooth with no grinding or fetching up spots. If what your talking about is something different please let me know. Thanks!

              latexeses: Thanks for the link.

              WM: LOL..Yep I know for certain she goes at least 85.
              1981 XS1100H


              Quando omni flunkus moritati

              When all else fails, play dead.

              Comment

              • #8
                Maybe an out of balance tire. I like Geezer's way of checking, start at the tire and work your way up.
                2H7 (79) owned since '89
                3H3 owned since '06

                "If it ain't broke, modify it"

                ☮

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