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vmb
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« on: February 26, 2014, 07:54:30 AM » |
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Just took off rear tire(Avon Cobra)to lube splines and clean my 2000 Interstate and noticed scalloping of the tire with only 4,000 miles of wear. Rear shocks are the regular Progressives that are set on the second level and I run 44-46 lbs pressure. Also, how much of a job is it to pull the drive shaft while I have the tire off. Thanks for any advice
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Chrisj CMA
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« Reply #1 on: February 26, 2014, 08:25:45 AM » |
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Low Air Pressure. Less than 40psi and you can expect the scalloping or "cupping".
pulling the drive shaft is a two minute job once the wheel is off....search is your friend....many posts of what to do and what not to do.
Putting that rear end/wheel back together is critical you do some things in the right order. Study, go by the book.
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« Last Edit: February 26, 2014, 08:29:14 AM by Chrisj CMA »
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TJ
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« Reply #2 on: February 26, 2014, 08:30:41 AM » |
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Balance the tire...
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Ricky-D
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« Reply #3 on: February 26, 2014, 08:31:40 AM » |
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Depending, upon your definition of "scalloping" or "cupping",
what you see could very well, and simply be,
the normal wear characteristics of the tire because of the tread design.
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2000_Valkyrie_Interstate
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dr.danh
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« Reply #4 on: February 26, 2014, 08:32:09 AM » |
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Go to Shoptalk. Chris has a great step by step on what your wanting to know.
Rear End Service by ChrisJ
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vmb
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« Reply #5 on: February 26, 2014, 08:37:36 AM » |
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I put 2 packs of dyna beads in when the tire was mounted. Has always been smooth, no vibration. Replaced the shock bushings on the progressive 412's as well
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Daniel Meyer
Member
Posts: 5493
Author. Adventurer. Electrician.
The State of confusion.
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« Reply #6 on: February 26, 2014, 09:34:46 AM » |
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Also double-triple check your pressure gauge. Make sure you are running the pressures you think you are running.
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CUAgain, Daniel Meyer  |
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Bone
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« Reply #7 on: February 26, 2014, 09:43:57 AM » |
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And check the air pressure on cool tires. I check mine in the morning before moving.
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ugelstad
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« Reply #8 on: February 26, 2014, 02:14:26 PM » |
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Simple to pull the drive shaft, a real pain to put back in until you know the secret. I thought I would never get it back in the first several times, until Dan Meyer showed us the trick at INZANE. Make sure the drive shaft tube is above level when inserting and wiggle it. It goes right in. Thanks Dan.
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Jess from VA
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« Reply #9 on: February 26, 2014, 02:22:25 PM » |
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Based on years of reading here and elsewhere, Avons are famous for irregular wear, scalloping, and sometimes delaminating. So I've never run them. In fairness, this may indeed be normal wear and have little affect on riding till used up.
Not one of many Metzlers run at consistent high pressure ever did this (course, they wear out faster than any other tire too).
You pays your money and you takes your chances.
In answer to your original question. Causation of irregular wear. Underinflation is number one (and I think if you take one big ride at 22lbs (creating high heat), damage may be sufficient to initiate and continue bad wear no matter if you have it aired up properly for the remainder of the tire's life). Poor/no balance, riding style, usual road surfaces, high road crowns, riding mostly straight and level with no edge wear, breaking/damaging a steel belt on a bad pothole.
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« Last Edit: February 26, 2014, 02:36:55 PM by Jess from VA »
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sandy
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« Reply #10 on: February 26, 2014, 03:40:27 PM » |
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I've had several sets of Avons and none have cupped. I run 46 PSI. Rear shocks are Works Performance.
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Jess from VA
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« Reply #11 on: February 26, 2014, 04:16:41 PM » |
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Well, I did misspeak (forgot), I have an Avon Roadrider bias rear on the front reversed. It is also wearing perfectly. As a bias, max psi is lower than radials, but I keep it a pound two under max psi.
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salty1
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Posts: 2359
"Flyka"
Spokane, WA or Tucson, AZ
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« Reply #12 on: February 26, 2014, 04:29:28 PM » |
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Two sets of Avons and no cupping. Front 42lbs, Rear 44lbs.  |
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My rides: 1998 GL1500C, 2000 GL 1500CF,2006 GL 1800 3A   |
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vmb
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« Reply #13 on: February 26, 2014, 06:03:27 PM » |
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When replacing the drive shaft does it have to be lined up a certain way or is it just a matter of sliding it back in? I noticed the one response about raising it above level when putting it back in just wondered if there is anything to be lined up with anything else.
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hubcapsc
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Posts: 16788
upstate
South Carolina
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« Reply #14 on: February 26, 2014, 06:08:35 PM » |
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When replacing the drive shaft does it have to be lined up a certain way or is it just a matter of sliding it back in? I noticed the one response about raising it above level when putting it back in just wondered if there is anything to be lined up with anything else.
If you shine a light up the swingarm, you'll see the u-joint hanging way back there. The u-joint needs to be "pointed in the right direction" to accept the drive shaft when you insert it, or else you're in for a lot of useless shoving and cussing. Something about raising the swingarm causes the u-joint to readily accept the drive shaft... all I know is it seems to be the trick. -Mike |
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vmb
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« Reply #15 on: February 26, 2014, 07:12:52 PM » |
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Thanks to all! Think I can giterdone now. Ride safe
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rhinor61
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« Reply #16 on: February 27, 2014, 09:06:18 PM » |
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I have cupping on both metz and Avons..
Its worn out rear shock mainly, and running a lower tire pressure in the rear.
The worn out rear shocks are allowing for rear wheel tp hop, you can feel it when you load up on the bike into a corner, the bike will unload and push up instead of keeping the tire patch continuously on the ground.
just because a shock doesnt leak oil, by NO means its 100%. if its 7+ years old replace it with 1 that matches your riding style.
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John
Northern California
1998 Valkyrie Tourer Black/jade
VRCC #28001
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donaldcc
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« Reply #17 on: February 28, 2014, 09:27:40 AM » |
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Two sets of Avons and no cupping. Front 42lbs, Rear 44lbs. I've had several sets of Avons and none have cupped. I run 46 PSI. Rear shocks are Works Performance.
Same for me, on my 3rd set of Avons with no cupping. Recent change with back tire at wear marks with over 12 k miles. changed out front with it but it easily had several thousand miles more. Dunlops before those did have cupping but probably my error in under inflation so now I am pretty diligent with checking pressures. http://www.rattlebars.com/tirewear/index.html |
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« Last Edit: February 28, 2014, 12:08:44 PM by donaldcc »
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Don
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Westsider
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« Reply #18 on: February 28, 2014, 08:22:58 PM » |
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MANY units of linear measurements in a forward plane, equal to 5,280 feet or 1,760 yards each.  |
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we'll be there when we get there - Valkless,, on lookout....
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Ken Tarver
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« Reply #19 on: March 02, 2014, 08:18:33 PM » |
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check air pressure every day before you ride
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Brian
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« Reply #20 on: March 08, 2014, 07:01:28 PM » |
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When replacing the drive shaft does it have to be lined up a certain way or is it just a matter of sliding it back in? I noticed the one response about raising it above level when putting it back in just wondered if there is anything to be lined up with anything else.
If you shine a light up the swingarm, you'll see the u-joint hanging way back there. The u-joint needs to be "pointed in the right direction" to accept the drive shaft when you insert it, or else you're in for a lot of useless shoving and cussing. Something about raising the swingarm causes the u-joint to readily accept the drive shaft... all I know is it seems to be the trick. -Mike If I remember this correctly I leave the transmission in gear when doing the rear end maintenance each spring. This way the output shaft is not turning when trying to line up the splines on the driveshaft and when putting the rear wheel back in place. |
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