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Cliff
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« on: May 23, 2010, 02:40:28 PM » |
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2000 I/S, dunlop e3 front and rear. F= 40psi r= 42psi. Only recent work done = front and rear pads replaced by removing caliper only, brakes work fine no drag or anything even on lift. Checked front while on lift no free play noticed in steering head and no free play noticed on swing arm. Spun both tires while on lift nothing noticed??????? any thoughts from the knowledge base out there?
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VRCC # 29680
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junior
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« Reply #1 on: May 23, 2010, 02:52:13 PM » |
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i have found that on alot of the new hampshire roads that they are washboard parts of 3a,106,3,28. its from the pavers and rollers so it might not be in your bike,
its just what i have observerd
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Smokinjoe-VRCCDS#0005
Member
Posts: 13834
American by Birth, Southern by the Grace of God.
Beautiful east Tennessee ( GOD'S Country )
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« Reply #2 on: May 23, 2010, 03:01:55 PM » |
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I've said it before...I would'nt run Dunflops on my bike if they gave them to me with free mounting.
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 I've seen alot of people that thought they were cool , but then again Lord I've seen alot of fools. |
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Cliff
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« Reply #3 on: May 23, 2010, 03:05:02 PM » |
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i have found that on alot of the new hampshire roads that they are washboard parts of 3a,106,3,28. its from the pavers and rollers so it might not be in your bike,
its just what i have observerd
Not the roads... happens in places that were previously smooth. Since a give the I/S a once over it isn't as scary but still confusing. |
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« Last Edit: May 23, 2010, 03:07:49 PM by Cliff »
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VRCC # 29680
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Cliff
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« Reply #4 on: May 23, 2010, 03:10:53 PM » |
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I've said it before...I would'nt run Dunflops on my bike if they gave them to me with free mounting.
LOL,, Joe these are my last set, have a set new Avon cobras ready to mount (probably will VERY soon ) this shimy is driving me nuts only occurs from 0-25mph after which smooth all the way to top end.... Probably going with a CT after the cobra is done should be next spring when that is ready. |
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VRCC # 29680
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Smokinjoe-VRCCDS#0005
Member
Posts: 13834
American by Birth, Southern by the Grace of God.
Beautiful east Tennessee ( GOD'S Country )
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« Reply #5 on: May 23, 2010, 03:19:15 PM » |
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I've said it before...I would'nt run Dunflops on my bike if they gave them to me with free mounting.
LOL,, Joe these are my last set, have a set new Avon cobras ready to mount (probably will VERY soon ) this shimy is driving me nuts only occurs from 0-25mph after which smooth all the way to top end.... Probably going with a CT after the cobra is done should be next spring when that is ready. Kinda sounds like to me you have a wheel out of balance  |
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I've seen alot of people that thought they were cool , but then again Lord I've seen alot of fools. |
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roboto65
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« Reply #6 on: May 23, 2010, 03:32:45 PM » |
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Hate to say it but I will have you checked your shock bushings these are known to go out on the Valks just the upper ones. If you can see a gap or the washer in not in line with the round hole on the top of the shock they are bad !!!!
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Allen Rugg VRCC #30806 1999 Illusion Blue Valkyrie Interstate 1978 Kawasaki KZ 650 project  |
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Cliff
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« Reply #7 on: May 23, 2010, 04:10:31 PM » |
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I've said it before...I would'nt run Dunflops on my bike if they gave them to me with free mounting.
LOL,, Joe these are my last set, have a set new Avon cobras ready to mount (probably will VERY soon ) this shimy is driving me nuts only occurs from 0-25mph after which smooth all the way to top end.... Probably going with a CT after the cobra is done should be next spring when that is ready. Kinda sounds like to me you have a wheel out of balance I thought out of balance would be worse as speed increases??? |
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VRCC # 29680
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Cliff
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« Reply #8 on: May 23, 2010, 04:11:59 PM » |
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Hate to say it but I will have you checked your shock bushings these are known to go out on the Valks just the upper ones. If you can see a gap or the washer in not in line with the round hole on the top of the shock they are bad !!!!
replaced bushings with new style bushings last fall with install of prgoressive 440's |
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VRCC # 29680
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fudgie
Member
Posts: 10613
Better to be judged by 12, then carried by 6.
Huntington Indiana
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« Reply #9 on: May 23, 2010, 04:16:28 PM » |
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My guess is also out of balance. Most of the time it goes away with increased speed. Do you have dyna beads? Change out the flop and see if it still does it.
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 Now you're in the world of the wolves... And we welcome all you sheep... VRCC-#7196 VRCCDS-#0175 DTR PGR |
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Gryphon Rider
Member
Posts: 5227
2000 Tourer
Calgary, Alberta
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« Reply #10 on: May 23, 2010, 04:44:32 PM » |
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When I have had noticable low speed shimmy, the cause has always been low tire pressure. Right now I have very slight low speed shimmy in corners with a ready-to-be-replaced E3 on the front and a Falken CT on the back.
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Ricky-D
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« Reply #11 on: May 23, 2010, 04:46:23 PM » |
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That's a manufacturing problem and results in a poorly layered carcass in the tire. Some places in the tire are stiff while other places are softer.
Only way to compensate is with air pressure. Find the pressure that results in the best handling.
Most times it means a lower pressure.
***
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2000_Valkyrie_Interstate
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Cliff
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« Reply #12 on: May 23, 2010, 06:02:44 PM » |
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My guess is also out of balance. Most of the time it goes away with increased speed. Do you have dyna beads? Change out the flop and see if it still does it.
Yes on the beads + weights... 2oz front 3oz rear. |
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VRCC # 29680
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Michvalk
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« Reply #13 on: May 23, 2010, 06:35:49 PM » |
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Mine has had a low speed shimmy through 3 different tires. Stock dunlop, E-3 Dunlop, and now the Avon Cobra. Quits at about 35 MPH. I have balanced the tire both at the dealer and on my bench. I can't let go of the handlebars at any speed unless the road is perfectly smooth. Always been that way, guess always will be.  |
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Cliff
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« Reply #14 on: May 24, 2010, 04:10:09 AM » |
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.............Most times it means a lower pressure.............
***
I'll give that a try,, no opportunity to put the Cobras on in the near future.... |
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VRCC # 29680
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Cliff
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« Reply #15 on: May 24, 2010, 04:11:44 AM » |
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Mine has had a low speed shimmy through 3 different tires. Stock dunlop, E-3 Dunlop, and now the Avon Cobra. Quits at about 35 MPH. I have balanced the tire both at the dealer and on my bench. I can't let go of the handlebars at any speed unless the road is perfectly smooth. Always been that way, guess always will be. Having the shimy/squirm permanent would drive me crazy, the smooth Valk was soooooo much better. |
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VRCC # 29680
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1FAST6
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« Reply #16 on: May 24, 2010, 10:36:09 AM » |
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Jack it up and spin the wheels. Hold something very close to the tire as you spin it and see if you have a high spot where the tire is out of round. A weak spot in the tire may become more apparent as the tire wears. Many have had manufacturing defects with Dunlops. I personally don't use them, but I'm not going to talk trash...
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valk2128
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« Reply #17 on: May 24, 2010, 04:28:12 PM » |
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I have had a similar problem.
I checked the front-end, replaced the front wheel bearings.
Pulled the rear tire off and check the bearings, they were fine.
Checked and re-torqued the steering stem twice.
Put a set of Dunlop's on , rear was out of round. Replaced with a set of Avon Cobras 300 miles later. I will never have another set of Dunlops, they are terrible.
Even though the front end seemed tight, I pulled it apart and check the steering stem bearings. They steering stem races were indexed. I am in the process replacing the bearings and will be putting it back together over the next few day.
I believe this has been the problem of my low speed shimmy / wobble.
Good luck finding yours.
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JimC
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« Reply #18 on: May 24, 2010, 07:46:27 PM » |
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I had an almost new E3 that was out of round, it shimmied just lie you say yours does, from 0-30 was fine, from 30-45 the shimmy was bad, from 45 up it went away. Do like 1fast6 says and hold somethign at the fender tip and rotate the tire and see if you can spot a high spot. Mine was a high spot clearly 1/8 inch or more out of round. Like RickyD said, it is in the way the belts lay up in the tire.
Jim
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Jim Callaghan SE Wisconsin
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Ricky-D
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« Reply #19 on: May 25, 2010, 06:16:54 AM » |
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Jack it up and spin the wheels. Hold something very close to the tire as you spin it and see if you have a high spot where the tire is out of round. A weak spot in the tire may become more apparent as the tire wears. Many have had manufacturing defects with Dunlops. I personally don't use them, but I'm not going to talk trash...
You can sure do that test and find high spots which can cause a bounce but, spin the tire with a pointer on either sidewall and you will find the sidewall is not consistent. This is the problem and is what causes the potential wobble. It transfers the contact patch a little bit from one side to the other making the bike want to compensate and cause the wobble. Adjusting the pressure will change the sidewall stiffness and compensate for the irregular sidewall, just have to find the sweet spot. *** |
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2000_Valkyrie_Interstate
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1FAST6
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« Reply #20 on: May 25, 2010, 01:01:22 PM » |
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Agreed! You should find no significant irregularities in the geometry of a good tire, properly seated, at standard pressure, top to bottom or side to side. If you do, I would replace it, especially if it's more than half way gone. If it was new, I'd be wanting my money back.
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Cliff
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« Reply #21 on: June 14, 2010, 03:58:25 PM » |
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Belated update,,, the rear tire waas the culprit, if you looked real close while spinning on the lift you could see a small side to side shift of the center line, after replacing with an AVon cobra smooth as silk again!!! ready for the ride to Michigan!!
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VRCC # 29680
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wupster
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« Reply #22 on: June 14, 2010, 07:03:27 PM » |
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had the same problem.. if tires , pressure and wheel bearings are all ok.
replace the steering head bearings, the torque is very important.
solved my shimmy..
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