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Scraping Metal Over Bumps

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Old Sep 25, 2007 | 01:05 PM
  #21  
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tmoreau
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Default RE: Scraping Metal Over Bumps

ORIGINAL: glens

I don't know... Sure seems to me that if hard parts were contacting the road you'd sure know it beyond just the sound. I'm thinking rear suspension either bottoming out or allowing the tire to rub inside the fender (if it'll allow it to go that high).

Maybe the downward motion is rapid enough to throw the sidestand down enough to touch ground before it returns.
Your post got me to thinking. I have a Harley sidestand extension http://www.harley-davidson.com/gma/gma_product.jsp?PRODUCT%3C%3Eprd_id=84552444198879 5&FOLDER%3C%3Efolder_id=2534374309184721&A SSORTMENT%3C%3East_id=2534374309184721&bmUID=1 190743192550&bmLocale=en_CA. That puts more weight on the stand, so that when the bike hits a sizeable bump, the bike goes up but the inertia of the heavier sidestand makes it stay put. Then, after the bump, both bike and sidestand come down, the shocks compress as far as they will and the sidestand keeps on going. In my mind's eye, the sound the bike made over those bumps was similar to footboards or sidestand, though I'm not sure.

I'll be riding the bike later today and try to see what's what down there. I don't have good lighting in the underground parking here. I'm beginning to think that the sidestand needs a bit of tightening. I'll post what I find.
 
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Old Sep 25, 2007 | 03:54 PM
  #22  
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glens
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Default RE: Scraping Metal Over Bumps

That's what I was thinking when I suggested it. You'd said you had an extension on it. Might just need to take a coil out of the spring to tighten it up.
 
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Old Sep 25, 2007 | 03:57 PM
  #23  
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Default RE: Scraping Metal Over Bumps

Jiffy stand spring for me too.
 
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Old Sep 25, 2007 | 04:57 PM
  #24  
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Default RE: Scraping Metal Over Bumps

Here are a couple more ideas. If you look under it and do not see anything evident then do this:

1) Check to make sure the rubber bumper for the kick stand is still on the frame. They fall off all the time and it will sound terrible when you hit a bump.

2) If you still don't see anything, put some duct tape on the low parts of your bike under the frame and on the kickstand. Go for a ride and try to bottom it out (like it does now) and then come back and inspect. The duct tape will have a clear indication of the point causing the problems.

Hope this helps.
 
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Old Sep 25, 2007 | 07:17 PM
  #25  
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Default RE: Scraping Metal Over Bumps

ORIGINAL: Rev00

Here are a couple more ideas. If you look under it and do not see anything evident then do this:

1) Check to make sure the rubber bumper for the kick stand is still on the frame. They fall off all the time and it will sound terrible when you hit a bump.

2) If you still don't see anything, put some duct tape on the low parts of your bike under the frame and on the kickstand. Go for a ride and try to bottom it out (like it does now) and then come back and inspect. The duct tape will have a clear indication of the point causing the problems.

Hope this helps.
Well, I got it out in daylight (sort of) and had as good a look as I can with middle-aged eyes. I saw no chafing on the sidestand. Although I couldn't see anything on the crossmember, I felt all 4 corners of it, as well as the middle front and rear. The corners feel like they've been filed, while the middle is paint-smooth. So, maybe my shocks are low on air. I'm having the bike in for service on Fri anyways, so I'll talk to them about it. I'll post whatever they find or say.

Thanx to everyone for the helpful replies so far. Much appreciated.
 
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Old Sep 28, 2007 | 06:59 PM
  #26  
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Default RE: Scraping Metal Over Bumps

Got the bike back from the shop today. There was only FOUR psi in the shocks! Geez. They also added a little to the rear tire, though it did look fine. (Yeah, I know. Ya can't really tell without a tire pressure gauge.) It's annoying that they would deliver a bike with shocks that low. [:@]

Now, I'm gonna take a run at some bumps.
 
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