Buzz from the rear of the bike


Information and questions on GL1500 Goldwings (1988-2000)
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crmoffet
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Joined: Sun Jun 12, 2011 7:13 pm
Location: Olympia, WA
Motorcycle: 1989 GL1500

Buzz from the rear of the bike

Post by crmoffet »



I have an '89 GL1500. I recently replaced the rear tire. I took the tire to a Honda dealer to have the new tire mounted on the rim, brought it back home, repacked the splines with grease, and, while I was at it, replaced the final drive oil. I used a synthetic but was warned that I should stick with a petroleum base gear lube and so drained it, flushed the drive with 80-90, and then filled the drive with the correct amount. Now, when I ride, there is a buzzing sound coming from the rear of the bike. I had the bike up on the center stand and ran it through the gears. I could hear it but am unable to locate it other than near the rear axle/ final drive area.
Has anyone else had this occur and what did you find?
Thanks,
Chris from WA state


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Rambozo
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Re: Buzz from the rear of the bike

Post by Rambozo »

Have bees made a hive in your luggage?
crmoffet
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Re: Buzz from the rear of the bike

Post by crmoffet »

Hah! I wish it were that simple. Bees I can deal with. A buzz coming from somewhere is a bit vague. I guess buzz is not descriptive enough. It is not a grinding noise nor is it a whine. At slow speeds (from take off to approximately 1500 rpm) it starts as a clicking noise that increases in frequency. It seems to level out between 1500 and 2000 rpm. I had my wife ride along and she confirmed that it is definitely at the rear of the bike.
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Re: Buzz from the rear of the bike

Post by DenverWinger »

Hold the speed where the Buzz is loudest, then shift to 2nd gear. You'll drop to around 1000 RPM but same speed in MPH. Does the buzz change, even if same speed?
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Rambozo
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Re: Buzz from the rear of the bike

Post by Rambozo »

You can also try rotating the rear wheel by hand to see if you can find a spot where it clicks.
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Re: Buzz from the rear of the bike

Post by Rambozo »

crmoffet wrote: Thu Feb 02, 2023 11:49 pm At slow speeds (from take off to approximately 1500 rpm) it starts as a clicking noise that increases in frequency. It seems to level out between 1500 and 2000 rpm. I had my wife ride along and she confirmed that it is definitely at the rear of the bike.
Does the noise only happen when your wife is around?



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crmoffet
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Joined: Sun Jun 12, 2011 7:13 pm
Location: Olympia, WA
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Re: Buzz from the rear of the bike

Post by crmoffet »

Yes, the sound changes pitch at different speeds/rpm. I have not been able to say that it is a speed or rpm thing. I tried rotating the rear tire with the bike on the center stand and was unable to say that the noise came from either the rear wheel or the final drive.
gford
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Re: Buzz from the rear of the bike

Post by gford »

did you replace the rear tire with a dunlop elite 4. The reason I ask is when I first put an elite 4 on my 99se I got a buzz from the rear tire when on certain road surfaces, My buddy put an elite 4 on his 2000 se and he had the same buzzing, Some surfaces were very loud and on other surfaces you couldn't hear anything.
gford
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Re: Buzz from the rear of the bike

Post by gford »

Here is what I went through

viewtopic.php?f=6&t=44925
bbrackett
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Re: Buzz from the rear of the bike

Post by bbrackett »

step on the foot brake, does it stop ?
then check the caliper, could be pad's rattlin
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Charlie1Horse
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Re: Buzz from the rear of the bike

Post by Charlie1Horse »

If you have changed the rear tire and this tire is a bit taller than the last tire there is a small mudflap up under the seat inside the fender that can touch the new tire and make noise. I have seen posts about tying this flap back a little with a zip tie to get clearance and stop the buzzing.
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crmoffet
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Re: Buzz from the rear of the bike

Post by crmoffet »

Thanks for all the input.
Yes, the tire is the Dunlop Elite 4 for Goldwings. I have had a previous set (front and rear) which I wore out, then put a new set on. It was this set where I got a cut on the sidewall (still not sure where it occurred) and the penetration was so small it slow leaked down to the point of instability. I was doing only 45 at the time instead of freeway speed. Anyway, the set was still new enough, I replaced only the rear and this is when I first noticed the buzzing whine. I don't remember it on the previous sets of new tires. Stepping on the brake only changes the frequency of the noise as the bike slows down. I have only about 50 miles on this new tire.
I'll continue to ride it and keep an ear out for any changes in the noise or with the bike.
crmoffet
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Re: Buzz from the rear of the bike

Post by crmoffet »

Latest update on the unwanted buzz: it's still there. I replaced the rear wheel bearing (and oilseals and o-rings) with no change. Now, I'm going to rebuild the final drive. I have purchased the bearings, seals, and o-rings. What I'm not finding is an article or video of the rebuild. That is a bit concerning as I figured that someone would have done that by now. Does anyone know of a final drive rebuild video?
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Re: Buzz from the rear of the bike

Post by csj »

Don't know if this'll help.



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It's a video of a Valkyrie drive getting work done. Drives should be the same.

If the link doesn't work, search Youtube for 'Final drive service on a Honda Valkyrie'.
crmoffet
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Re: Buzz from the rear of the bike

Post by crmoffet »

Thanks for the info. I gave up and took the parts I purchased and the FD w/ the driveshaft to the Honda Service shop. They told me they would know in under an hour whether the parts I provided were sufficient to repair it or it I needed to find a replacement on ebay.
crmoffet
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Re: Buzz from the rear of the bike

Post by crmoffet »

And the latest on the final drive drama: It has reached it's life expectancy. The pinion joint has about a 3/32" play in the rotation and the driveshaft splines along with the ring and pinion gears splines are wearing off. The tech who opened it up was surprised as the drive had plenty of the gear lube in it and the exposed splines were well greased and the grease was in good shape. They said I was just one of the unlucky ones. They had a '95 GL1500 in the shop with the same issue and they showed the FD to me. The gear lube was black and there was no grease on the splines. That owner had purchased a used '95 FD and DS through ebay as a replacement. I then spent about 45 minutes with the service manager going back and forth through the Honda Goldwing files on their computer looking up and matching part numbers on the various years of GL1500 final drives and drive shafts. We also compared the '95 parts with mine and found no difference. It was a reasonable guess but we think that the difference in part numbers over the years may be a change in suppliers for the various components or something similar.

All this said to ask, is there any reason I can't use a '99 FD and DS (or any other model year FD and DS) in an '89?
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Rambozo
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Re: Buzz from the rear of the bike

Post by Rambozo »

89 has a different wheel hub. 6 vs 5 pins, not sure about the splines matching either.
crmoffet
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Re: Buzz from the rear of the bike - next...

Post by crmoffet »

I obtained another final drive and driveshaft from a bike with only about 70K on it. The drive is in great shape. I cleaned it out, regreased the splines, filled it with new oil. Greased the splines on the drive shaft and reseated it in the drive. Now attempting to reinstall the drive and drive shaft on the bike. It stops about a 1/2" shy of full insertion.

Are there any tips for the reinstall that I am missing. Of course, there is nothing in the book about this.
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Rambozo
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Re: Buzz from the rear of the bike

Post by Rambozo »

The first thing of course would be to match up the shaft to your old one to make sure it is an exact match.
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MaineStreet
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Re: Buzz from the rear of the bike

Post by MaineStreet »

Info in this thread may help. The u joint has to be aligned correctly to recieve the splined drive shaft.

viewtopic.php?f=14&t=6951&start=25

I used the reverse technique, and that worked fine for me - rotated the U-joint to receive the splines.


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