1994 1500 vibration at low speeds


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Goldwinger365
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Motorcycle: 1994 GL1500 Aspencade
2006 GL 1800

1994 1500 vibration at low speeds

Post by Goldwinger365 »



I've searched the threads and tried the search in this forum to no avail.My 94 Aspy has a vibration at lower speeds going straight,if you are in a turn/lean either way,it goes away.i have new Dunlop E4 tires,balanced,new wheel bearings,new u joint,new brake pads.Brakes do not pulsate when applied.It really sounds,and feels like a low pitched growl,I'm about at my wit's end.Am I overlooking something simple?Thanks in advance.



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dingdong
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Re: 1994 1500 vibration at low speeds

Post by dingdong »

Not sure what could cause this so first a question. Did this occur before the new tires were installed???

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Goldwinger365
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Re: 1994 1500 vibration at low speeds

Post by Goldwinger365 »

This is why I have new tires,bearings,u joint etc.Bought the bike last year with 49,000 miles on it,has done this since I've got it,hasn't gotten worse,now has 63,000 on it.Just seeing if anyone else has experienced this and what was the fix?It is smooth as glass at cruising speed,my wife can't feel it on the back,she says I'm too finicky,it is after all a motorcycle.

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Mh434
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Re: 1994 1500 vibration at low speeds

Post by Mh434 »

I had that happen, too. Turned out to be extra-hard, sintered-metal brake pads, installed by the previous owner. The vibration could be felt through the seat, bars, and pegs, and was a result of the new pads grinding away my rotors. It took several months of riding for this to become evident. It only occurred at very low speeds, but eventually became audible to everyone nearby.

I changed the pads back to an OEM-equivalent compound, and the vibration instantly vanished. There was noticeable damage to the rotors, but they're still usable. Good thing, as GL1500 rotors are VERY expensive!!! :shock:

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Goldwinger365
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Re: 1994 1500 vibration at low speeds

Post by Goldwinger365 »

There all OEM Honda pads,been down the " inexpensive" pad road before,,,I'd rather spend the money and be able to stop.Also,when I use the brakes,noise does not change at all.Maybe I'm expecting too much from a 23 year old bike. Anyway,it's not affecting driving or braking,so I'll keep on running her.

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Bluewaterhooker0
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Re: 1994 1500 vibration at low speeds

Post by Bluewaterhooker0 »

My only shot in the dark might be the speedometer cable / speedo. But that doesn't explain why it goes away in a bank. It sure sounds bearing or tire related. But you say the tires are brand new, and bearings. I did pick up a slight "growl" from my aftermarket alternator at low RPM's, but again, banking doesn't effect it.

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Happytrails
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Re: 1994 1500 vibration at low speeds

Post by Happytrails »

I'll throw in another suggestion. Have you replaced the alternator rubber bushings? They can make that sort of sound but I dont think leaning the bike would make it go away if this were the issue.
1991 GL1500 SE Anniversary Edition
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Goldwinger365
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Re: 1994 1500 vibration at low speeds

Post by Goldwinger365 »

Just replaced the alternator bushings/dampeners today as a matter of fact.Had them in stock for just in case, didn't help,although old ones were rock hard.Also,has new speedo cable as of 3000 miles ago.I replaced about everything that I thought would even remotely cause this.Keep on with the suggestions though,I appreciate everyone's input and time,and am confident someone has the answer.

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Mh434
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Re: 1994 1500 vibration at low speeds

Post by Mh434 »

Well, if we go back to basics, it has to be.something related to tires, rims, bearings, or related items, particularly as it goes away when you're turning. That says to me it has to be something on which loading changes in turns, which eliminates the speedo gear, brakes, etc.

Really, it's logical that steering head bearings, wheel bearings, or the front tire are responsible. I suspect one of those three is the source of your problem.

I know you've replaced all those things, but remember - it's not uncommon for a new part to be faulty, yet when we assume that it, therefore, can't be the problem, we limit ourselves as to the possibilities...

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Goldwinger365
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Re: 1994 1500 vibration at low speeds

Post by Goldwinger365 »

That makes sense.Being as it seems to be rotational noise,guess I'd better check the wheel bearings again.With my luck,it'll be the rear since they were the most fun to change the first time.Ah well,I've got the day off today,and the local Honda shop stocks them and the seals.Really can't imagine it coming from the steering bearings,just not that type of noise.

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Goldwinger365
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Re: 1994 1500 vibration at low speeds

Post by Goldwinger365 »

Had a chance to get out and do some test riding by myself,trying to pinpoint this annoying vibration/noise.I think I've got it narrowed down to the front wheel area.Can feel it through the handlebars when it occurs.Any where from 15 mph up to 35-40 mph going straight,lean into a curve or turn and it's gone.Can drive out of it above 40 to 70 mph,smooth as glass.Braking does not affect it at all,nor does pulling in clutch and free wheeling.Almost has to be bad front bearings.I replaced them when I replaced my tires,used All Balls brand if I remember correctly.Anyone had bad experience with them,or does anyone recommend just going with OEM bearings and seals.

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dingdong
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Re: 1994 1500 vibration at low speeds

Post by dingdong »

Not necessarily the front. Even vibrations originating from the rear will transfer to the handlebars.

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Erdeniz Umman
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Re: 1994 1500 vibration at low speeds

Post by Erdeniz Umman »

Goldwinger365 wrote:Had a chance to get out and do some test riding by myself,trying to pinpoint this annoying vibration/noise.I think I've got it narrowed down to the front wheel area.Can feel it through the handlebars when it occurs.Any where from 15 mph up to 35-40 mph going straight,lean into a curve or turn and it's gone.Can drive out of it above 40 to 70 mph,smooth as glass.Braking does not affect it at all,nor does pulling in clutch and free wheeling.Almost has to be bad front bearings.I replaced them when I replaced my tires,used All Balls brand if I remember correctly.Anyone had bad experience with them,or does anyone recommend just going with OEM bearings and seals.
I would check the front fork connections. If a forkbrace is not used, the lower part of the forks are only connected with a bracket inside the fender, check the bolts there.

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Mh434
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Re: 1994 1500 vibration at low speeds

Post by Mh434 »

I definitely suspect the issue is in the front end. While side loading changes in the rear end, too, during turns, the front end has much more dynamic change going on, and is more likely to show problems with wheel bearings, steering head bearings, fork security, etc.

Since it only occurs while the wheels are turning & going in a straight line, I suspect that eliminates the steering head bearings (as they're static under those conditions), and likely the fork security.

The speedo drive is directly linked to the front wheel hub so, if it were the culprit, the noise would always be there when the bike's in motion. Assuming the front axle is secure, the speedo drive wouldn't change in turns.

That basically leaves the front wheel bearings...

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someone548
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Re: 1994 1500 vibration at low speeds

Post by someone548 »

I don't have any better suggestions than the rest but I am quite curious what the solution to this mystery is.

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Goldwinger365
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Re: 1994 1500 vibration at low speeds

Post by Goldwinger365 »

That's what I was thinking,ordered OEM bearings and seals, should be in on Monday so I'll post back when I get them replaced.Thank you everyone for your input.Hopefully this solves the mystery.

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Corkster52
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Re: 1994 1500 vibration at low speeds

Post by Corkster52 »

The only similar front end issue I had with my 88 ended up being the top bearing nut being a bit loose causing a wobble at low speeds. Tightened the nut and no longer an issue.

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Aussie81Interstate
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Re: 1994 1500 vibration at low speeds

Post by Aussie81Interstate »

Did you have the tyre balanced when you put it on? Plus I would look at the fork brace... Mine would not necessarily grumble at low speed but would definitely send a wobble through the handlebars at low speed - blackwing brace on - problem gone.

:)

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Goldwinger365
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Re: 1994 1500 vibration at low speeds

Post by Goldwinger365 »

I used centramatic balance beads,and already have a superbrace. Definitely not a tire balance issue,too fast of a vibration/growl/buzz.

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seelyark1
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Re: 1994 1500 vibration at low speeds

Post by seelyark1 »

Try getting on the bike by yourself, and shift your weight to one side. That way the bike should lean over so that the weight rides more to the side of the tire instead of the center. Do you still hear the noise? Feel the vibration? Wonder if it is not just the tire tread.
Ride safe, and smart. Asphalt is like #1 grit sandpaper. Dave

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Goldwinger365
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Re: 1994 1500 vibration at low speeds

Post by Goldwinger365 »

Seelyark,that's exactly what it's doing.Ive now replaced front bearings with OEM and didn't change a thing.Has just about got to be tire tread causing issue.Ive replaced everything that may even remotely cause this.These E4's are a great cornering tire,but may be just a bit of noise I have to deal with,a trade off for long wear and great cornering.Have got roughly 4000 miles on them,no sign of cupping or wear,still look like new.

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Goldwinger365
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Re: 1994 1500 vibration at low speeds

Post by Goldwinger365 »

Well,since it's winter I figured I'd get back to trying to find this annoying vibration.As I was browsing other threads on this forum,I found a possible answer.Do you all think it may be caused by the rear wheel dampeners?I never even gave them a thought when I replaced my rear tire,just greased the splines and back together.Any thoughts?

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Goldwinger365
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Re: 1994 1500 vibration at low speeds

Post by Goldwinger365 »

So after many hours and ideas,I finally figured out the vibration in my bike.Was the front tire,a Dunlop E4 that I ran for approximately 8000 miles,As memory serves,it was something that started,or was noticed soon after installing the new set of E4s,I just never suspected a new tire would be noisey so soon after installation.I put on a new front tire last weekend,took it out for a spin,and wa-la,noise gone.I have nothing against the E4 series,but probably won't ever run that on front again.Must be the straight tread down the center of tire,picking up road noise or something.Anyway,thought I'd follow up with the end result,maybe save someone a headache in the future. :D

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Re: 1994 1500 vibration at low speeds

Post by WingAdmin »

Goldwinger365 wrote:
Mon Mar 26, 2018 10:27 pm
So after many hours and ideas,I finally figured out the vibration in my bike.Was the front tire,a Dunlop E4 that I ran for approximately 8000 miles,As memory serves,it was something that started,or was noticed soon after installing the new set of E4s,I just never suspected a new tire would be noisey so soon after installation.I put on a new front tire last weekend,took it out for a spin,and wa-la,noise gone.I have nothing against the E4 series,but probably won't ever run that on front again.Must be the straight tread down the center of tire,picking up road noise or something.Anyway,thought I'd follow up with the end result,maybe save someone a headache in the future. :D
I had this happen once with a brand new tire that I had just mounted. It looked fine, but vibrated during the test ride. Looking closely at the tire, the tread wasn't even down the middle of the tire. Looking even more closely, the distance between the rim of the wheel and a mark that ran around the sidewall on one side of the tire varied by almost 1/4" as the tire turned. I then realized that the bead had not seated evenly when I mounted the tire. I broke the bead and re-seated it, problem fixed. I now always check the bead seat very closely every time I mount a tire in order to make sure I don't make the same mistake again.

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Mh434
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Re: 1994 1500 vibration at low speeds

Post by Mh434 »

I've had that happen, more than once, even when professionals mounted the tire for me. It usually happens when no (or not enough) bead lubricant is used while mounting the tire. The bead "sticks" & doesn't pop all the way to a proper seating position. As you say, often just letting the pressure off & working on the bead will cause it to seat properly.

The last time it happened when I seated the tire myself, I went to my local friendly tire shop & described the problem. He gave me a large dollop (close to a pound) of tire lube in a plastic bag...probably enough to do a hundred tires... :D



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