September 24th, 2013, 08:47 AM | #1 |
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Speed Wobbles
So my problem is speed wobbles and I suspect it's this:
-I'm missing ~3 bolts from the faring, (one of the bolts had to be drilled into to break it from the faring cause the PO decided to cross thread it pretty good) ->Any good cheap bolt kits I can invest in? I just rode my gf's bike and she could handle all the way up to 100mph+ just fine but she has a lower aftermarket suspension from the PO. |
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September 24th, 2013, 08:51 AM | #2 |
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/moved to pre-gen tech
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September 24th, 2013, 08:52 AM | #3 |
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September 24th, 2013, 09:04 AM | #4 | |
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Quote:
Slow down !!!
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September 24th, 2013, 09:11 AM | #5 |
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September 24th, 2013, 10:48 AM | #6 |
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I've had head shake for months now I suspect it's the stem bearings needing to be replaced or at least adjusted. There is an upgrade to that for ~$40 from allballs.com <-- I think that's the web address....
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September 24th, 2013, 06:23 PM | #7 |
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I asked because the pre-gen is not adjustable and wanted to know what he had done and how high the rear was.
The front being lower than the rear makes the steering more sensitive and less self-correcting, which in my opinion avoids steering oscillations, but until certain point. If too much of a difference, then it can becomes dangerous unstable. In summary, if your height difference is moderate, the cause of your the problem may be a loose steering column (bearings), telescopic tubes with excessive play, swingarm pivot with worn shaft or needle bearings, a poorly lubricated chain (with hard kinks), ........ but the main culprit frequently is the absence of handlebar weights (those dark cylinders in both ends) or a big heavy tail trunk.
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September 24th, 2013, 09:41 PM | #8 |
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Absence of bar weights doesn't cause headshake.
It causes buzzy grips. Same idea, different scale. I've been without bar-end weights for somewhere around 8000-10,000 miles now. No tendencies to headhake caused by that. Now raising the tail definitely made it lighter and more sensitive to hand inputs when the front gets light over crests or bumps, but still no shake that wasn't caused by me |
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September 25th, 2013, 04:59 AM | #9 |
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So I was talking about it with a coworker and he concluded that since my gf's bike is lower(Aftermarket parts), there's less weight on the front for it to induce speed wobbles. That and, I'm about 30lbs heavier than her.
Therefore, last night I decided to do a test as I was following my gf @ 95mph, I sat my butt further back and decided to tuck in but not putting any weight on bars/tank, and mostly on seat/pegs... I didn't wobble but it felt as if I was going to fly off the bike if there was a headwind |
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September 25th, 2013, 05:03 AM | #10 | |
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Quote:
The suspension may have been altered, I really don't have a stock ninja to compare it with; I'll put pics up this weekend of the two bikes and a reference point with measurements of the sag. I'd do it sooner but school/work has left me with no time to myself |
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September 25th, 2013, 06:01 AM | #11 |
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I only get it when I take my hands off the bars.
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September 25th, 2013, 08:35 AM | #12 | |
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Quote:
Correcting that steering oscillation may take some time because you will need to change things and test the results. These are some measurements of my stock pre-gen:
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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