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morrism1
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« on: November 11, 2013, 07:56:17 PM » |
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I just bought a 2000 standard Valk with 14k miles. It is in excellent condition but I'm getting a slight vibration that seems to be proportional to speed. It is most noticeable in the 2800-3500 rpm range. It has Shinko tires with less than 500 miles on them. The vibration occurs 2-3 times/second. The vibration does not stop when I engage the clutch. The bikes rides straight when I apply the brakes and steers straight with no hands on the handlebars. My friend, who is an auto mechanic and ex-motorcycle mechanic says it's not the engine. He thinks that it is something on the front end: tire, alignment, suspension, or balance. The tech at the Honda dealership rode my Valk for about 15 minutes and seemed to think that it was the tires. He put 42 psi in them and told me to ride 150 miles and see if it got better. I'm up to 120 and I don't think that it is any better. I'm looking for some advice on easy and low cost items to check - tell me what you think.  |
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Michvalk
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« Reply #1 on: November 12, 2013, 02:25:16 AM » |
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If replacing the tires is out of the question, I would try Dyna Beads. I have never used them, but, many say they work well. I used Ride-ON in my last set of tires, and used no balancing at all and had good luck. If you have a lift, you could check the tires for out of round just by spinning the tire. You might be able to see the out of round, which would explain the vibration  |
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old2soon
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« Reply #2 on: November 12, 2013, 07:42:44 AM » |
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Maybe redo the front torqueing sequence. The front and rear torqueing sequences need to be done correctly or vibration and abnormal wear will result. AND a + huge on the dyna beads. Either a Clymer manual or the Honda repair manual. Dag's site has a down loadable one available. RIDE SAFE.
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Today is the tommorow you worried about yesterday. If at first you don't succeed screw it-save it for nite check. 1964 1968 U S Navy. Two cruises off Nam.
VRCCDS0240 2012 GL1800 Gold Wing Motor Trike conversion
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R J
Member
Posts: 13380
DS-0009 ...... # 173
Des Moines, IA
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« Reply #3 on: November 12, 2013, 08:05:40 AM » |
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I'd check that front tire for out of round.
I'm not too big a fan on Shinko's.
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44 Harley ServiCar   |
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #4 on: November 13, 2013, 02:02:19 PM » |
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Hard to tell from the post. Not that enough info wasn't give, vibrations can be tough to diagnose.
But, I too would suspect the tires. I think I'd recommend having the front tire spun and really really looked at and then rebalanced.
Now, I'm assuming something maybe I shouldn't. While sitting still in neutral I'll assume you ran the engine to those engine speeds.
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morrism1
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« Reply #5 on: November 13, 2013, 03:58:44 PM » |
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Correct, there are no vibrations with the engine running at 3K rpm while stopped.
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salty1
Member
Posts: 2359
"Flyka"
Spokane, WA or Tucson, AZ
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« Reply #6 on: November 13, 2013, 04:38:22 PM » |
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I'd check that front tire for out of round.
I'm not too big a fan on Shinko's.
Me either! Shinko Stinko. The Dyna bead suggestion is a good one IMO. Be sure and remove all existing weights if you use the beads. I've used them for years and never had had a problem, smooth as silk. |
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My rides: 1998 GL1500C, 2000 GL 1500CF,2006 GL 1800 3A   |
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The emperor has no clothes
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« Reply #7 on: November 13, 2013, 04:41:26 PM » |
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I think its your shinko. I also have one on front and all was fine for the first 800 or so miles. Then it developed a vibration like what you are saying. Rebalanced,put in ride-on, even put on a new ujoint. All to no avail. Now after 10,000 miles the vibration is pretty much gone.
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Ricky-D
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« Reply #8 on: November 14, 2013, 09:48:59 AM » |
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Heck, why haven't you gotten the front tire off the ground and spin the wheel.
It would seem to me that would be the first thing do to investigate what you say is vibration.
And with the crash bars situated as they are, elevating the front end is very easy with a little ingenuity.
I know the Honda tech validated your suspicions but I remain skeptical as to it being anything other, but your tire.
And relying on the PO for reliable information can be foolhardy.
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2000_Valkyrie_Interstate
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morrism1
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« Reply #9 on: November 14, 2013, 10:09:06 AM » |
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I'm borrowing a run-out gauge and with lift the front end tomorrow to check for high and low spots on the tire. I haven't done it yet becuase it's colder than a well-digger's butt here in Chicago right now.
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Ricky-D
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« Reply #10 on: November 14, 2013, 11:32:43 AM » |
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If there is a problem with the tire carcass the tire tread may not show a peculiarity,
but the sidewall sure should show something of unevenness and non-uniform profile.
It would be good to look at the tire closely, near where it meets the wheel, to insure
the tire is mounted fully and evenly. This is easiest to see when spinning the wheel.
There are concentric lines on the tire that should be evenly spaced in relation to the wheel rim.
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2000_Valkyrie_Interstate
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morrism1
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« Reply #11 on: November 15, 2013, 09:55:06 AM » |
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I just checked the run-out on the front tire. It's 0.033 from high to low. High and low are about 35 degrees apart on the circumference. The rest of the tire varies only a few thousandths. What is the acceptable range? I did not see any other abnormalities when spinning the tire.
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Ricky-D
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« Reply #12 on: November 15, 2013, 11:05:53 AM » |
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Well, since you feel it is speed related, the next thing to do would be to remove the wheel/tire and get it balanced.
That little bit of run-out is surely within specifications.
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2000_Valkyrie_Interstate
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bulabula
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« Reply #13 on: November 16, 2013, 07:41:50 AM » |
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Just to be sure, speed related means it varies with speed - and that could include bad brakes/rotors, u-joints as well as the wheels/tires. And not simply wheels/tires. The frequency of the vibe can tell you what it is.
It isn't difficult to distinguish a vibe caused from a tire at speed and a u-joint issue due to a difference in about 4x of frequency. I just went through a u-joint issue with my truck - the culprit joint was very very tight and caused a vibe at 65.
Its probably your tire balance, but stranger things have happened.
Personally, invest in some dynabeads. Wish I had gone to them sooner.
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Chris, USN (Retired)
'99 Standard; Yellow and Cream
'00 Suzuki Bandit B12S; Stage 2 kit
Millersville, MD
And Let us Never forget the Hillary Clinton comment:
“What Difference does it make how these men died!"
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morrism1
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« Reply #14 on: November 16, 2013, 08:32:54 AM » |
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The front wheel is off now for a trip to the stealership for a remount and spin balance. We'll see what this does for me before I start tearing into more stuff.
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GOOSE
Member
Posts: 704
D.S. #: 1643
Southwest Virginia
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« Reply #15 on: November 18, 2013, 02:14:25 PM » |
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REMOUNT THE TIRE, BUT DON'T SPIN BALANCE .... PUT THE BEADS IN IT. YOU CAN SPIN BALANCE, BUT AS SOON AS YOU PUT A 1000 MILES ON IT , THE THING IS OUT OF BALANCE AGAIN .... PUT THE BEADS IN IT.
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salty1
Member
Posts: 2359
"Flyka"
Spokane, WA or Tucson, AZ
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« Reply #16 on: November 18, 2013, 05:38:06 PM » |
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REMOUNT THE TIRE, BUT DON'T SPIN BALANCE .... PUT THE BEADS IN IT. YOU CAN SPIN BALANCE, BUT AS SOON AS YOU PUT A 1000 MILES ON IT , THE THING IS OUT OF BALANCE AGAIN .... PUT THE BEADS IN IT.
+1 Beads allow for a continuous dynamic balance through the life of the tire. |
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My rides: 1998 GL1500C, 2000 GL 1500CF,2006 GL 1800 3A |
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john
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« Reply #17 on: November 18, 2013, 10:45:05 PM » |
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" 2000 standard Valk with 14k miles "  bad tire ... tires are the ONLY thing between you and the pavement good motorcycle tires are not cheap don't be afraid to buy a good , quality set of tires for the Valkyrie keep'em air'd up 46 47 48 lbs may sound like a lot the tires love it and they will last longer $0.02  |
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vrcc # 19002
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ithitwhat
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« Reply #18 on: November 20, 2013, 01:58:45 PM » |
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This may be off the wall, but I had a shinko on front and it felt like the front was running over an irregular surface around 35mph as speed increased it would go away. I replaced front tire and bounce went away. The front tire was not out of round, but I think that the actual rubber compound in front tire may have varied enough to cause the bounce (more of an up and down motion in handlebars than a bouncer). If shinko quality is that bad they've got real problems. I will not buy anymore shinkos.
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