Loosing control


Information and questions on GL1500 Goldwings (1988-2000)
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wingthing88
Posts: 47
Joined: Mon Apr 15, 2013 6:00 am
Location: Indianapolis, Indiana
Motorcycle: 1988 gl1500

Loosing control

Postby wingthing88 » Mon Sep 21, 2015 11:02 am



I have searched the forum and haven't found any info on my problem. I have an 88 with 100k miles have changed the oil in the rear shock,change fork oil every year,and have a super brace. Two weeks ago I was on an exit ramp and the back end came loose and low sided me this is a 25 mph exit that I normaly take at 40-45 mph this day I was only doing about 25. Damage was minimal and no injury, praise God, exit was dry with no debris (have it on video) rode it home checked tires,frame,suspension, etc. could find nothing wrong. Since then I have felt the back start to slide in slow turns. Anyone have any ideas where to look for a problem? Tire pressure is at 38 front and 40 rear. Also I just rode a buddy's 97 and it goes down the road like it's on a cloud, mine rides like a hard tail?



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NVSB4
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Re: Loosing control

Postby NVSB4 » Mon Sep 21, 2015 11:49 am

WingAdmin did a good write-up on suspension problems here that might help.
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wingthing88
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Location: Indianapolis, Indiana
Motorcycle: 1988 gl1500

Re: Loosing control

Postby wingthing88 » Mon Sep 21, 2015 1:13 pm

Thanks for the info. Those are some great track day solutions and very helpful having all in one place. Unfortunately none of those are the problems I'm experiencing. I've been riding this bike a little over 4 years 52k miles and have never had a problem with stability,handling is on par with the best crotch rockets. This is a problem that has developed within the last two weeks although it has always been a stiff ride. The exit was a cloverleaf that I have been taking home for the last 15 years. I think I'm going to look into a new set of tires even though there's lots of life left. I was just hoping someone may be familiar with this problem. Thanks again for taking the time to look into this.

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WingAdmin
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Re: Loosing control

Postby WingAdmin » Mon Sep 21, 2015 1:47 pm

Well you've said two things that make me suspicious of your rear suspension. First you said it rides like a "hard tail." Second, you said that the back is "sliding out in corners".

The job of the suspension is to keep the tire in contact with the road as much as possible. It does this by presenting a much lower mass (wheel/tire and swingarm) than would be presented if the rear wheel was bolted to the frame, like a hardtail. If there was no suspension, every time you encountered a bump, the bump would force the rear of the bike into the air. The huge amount of inertia of the heavy bike would take a while to stop rising and then fall back to the ground, during which the wheel is not touching the ground.

If you have proper suspension, instead of presenting the entire mass of the bike to be raised when hitting a bump, instead only the suspension members are raised. This is then forced quickly back down to the ground by the suspension spring, to get the wheel back on the ground as quickly as possible.

I suspect your rear suspension is malfunctioning - perhaps a seized or binding bushing, a broken spring, lack of lubrication, it could be any number of things.

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wingthing88
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Re: Loosing control

Postby wingthing88 » Mon Sep 21, 2015 2:25 pm

Thanks Wingadmin. I think you have me pointed in the right direction. Tonight I'll pull the bags off and start scutinizing things a little more closely after all it does have over a 100k on it.

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Dusty Boots
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Location: Alvinston, SW ON
Motorcycle: 1992 GL1500Aspencade

Re: Loosing control

Postby Dusty Boots » Mon Sep 21, 2015 5:56 pm

Have you checked your rear wheel and swing arm bearings?

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wingthing88
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Location: Indianapolis, Indiana
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Re: Loosing control

Postby wingthing88 » Mon Sep 21, 2015 6:02 pm

I replace all wheel bearings when I got the bike and I'm going to tear down the back end later tonight or tomorrow and give it a good going over. Trouble is it's my main transportation I travel about 70 miles a day wing gets 40mpg my truck gets 20mpg. The wing has more than paid for itself in fuel save over the last 4 years.

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wingthing88
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Re: Loosing control

Postby wingthing88 » Mon Sep 21, 2015 7:14 pm

Somewhat good news! I believe with everyones help the problem is found. I weigh a considerable undisclosed amount(dr says if I loose five pounds I'll be overweight) and bouncing on the seat there is no rear suspension travel. I pulled the bags off put a long board under the rear tire and lifted the bike off the ground with no travel. Pulled the left rear shock assembly out and I have all kinds of travel with no binding,grinding,or side to side play. I think it's time for a new/used shock assembly(can't afford new)(or used for that matter). Anyone out there have a good used left shock assembly cheap???

BiggerDawg
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Re: Loosing control

Postby BiggerDawg » Tue Sep 22, 2015 4:50 pm

Hi,

I have a used (but good) pair of Progressive Suspension #416 Air Shocks.
You will have to get the tubing and connectors from Progressive, as I used the new ones.
You can have them for the cost of shipping to you.

Lou

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Bluewaterhooker0
Posts: 554
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Location: Tampa, Fl
Motorcycle: 1997 Goldwing GL 1500 SE

Re: Loosing control

Postby Bluewaterhooker0 » Wed Sep 23, 2015 1:01 am

BiggerDawg,
PM Sent to your inbox.

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wingthing88
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Re: Loosing control

Postby wingthing88 » Wed Sep 23, 2015 5:33 am

Hi BiggerDawg. I sent my cell number to your pm text is the best way to contact me 24/7 work two jobs no cell phones allowed.

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spiralout
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Motorcycle: 1975 GL1000 (gone)
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Re: Loosing control

Postby spiralout » Wed Sep 23, 2015 9:59 am

Bluewaterhooker0 wrote:BiggerDawg,
PM Sent to your inbox.

Why ya trying to jump in on guys offer to OP? :roll: :roll:

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Bluewaterhooker0
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Re: Loosing control

Postby Bluewaterhooker0 » Wed Sep 23, 2015 7:06 pm

Spiralout,
If he didn't want them....Yep. He wanted them.

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Mh434
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Re: Loosing control

Postby Mh434 » Thu Sep 24, 2015 12:58 pm

BiggerDawg wrote:Hi,

I have a used (but good) pair of Progressive Suspension #416 Air Shocks.
You will have to get the tubing and connectors from Progressive, as I used the new ones.
You can have them for the cost of shipping to you.

Lou

There's a whole bunch of great karma, right there!

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wingthing88
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Re: Loosing control

Postby wingthing88 » Thu Sep 24, 2015 1:14 pm

It comes from a lot higher up than karma.

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wingthing88
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Re: Loosing control

Postby wingthing88 » Fri Sep 25, 2015 5:55 am

Thank you everyone for your replies. They have been very helpful. And I especialy thank BiggerDawg for his help he went above and beyond. Dave.

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wingthing88
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Location: Indianapolis, Indiana
Motorcycle: 1988 gl1500

Re: Loosing control

Postby wingthing88 » Sun Oct 11, 2015 12:44 pm

Great news! I have finaly gotten around to installing the new/used 416's on my baby it's like having a new bike again. I'm so impressed that I hope to someday soon convince my wife that we need the new progressive springs for the front. Many thanks to everyone's advice and special thanks to BiggerDawg. Problem solved.




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