Fork dive, brake oddity


Information and questions on GL1500 Goldwings (1988-2000)
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Earl43P
Posts: 50
Joined: Sat Nov 01, 2014 7:15 pm
Location: Elizabeth City, NC
Motorcycle: 82 GL1100, parked in Pa.
93 GL1500 Interstate DD
99 Valkyrie IS

Fork dive, brake oddity

Postby Earl43P » Sat May 23, 2015 10:29 am



New-ish to me 93 Interstate, bought dirt cheap in Oct, fixed "some things" over the winter and been riding it since early April.
Put about 4000 miles on it to date.

When I use the foot pedal brake, the greater I apply it, the more significantly the front forks dive.

When I use the front handlebar lever alone, very little dive occurs, remarkably less.

Only factor I can cite is that I put Kevlar pads in the unlinked caliper and left the EBC pads in the other front and rear calipers because they were like new. Suspect the PO was a frugal guy and virtually always used the front only, that set of pads were THIN. I never really rode it until I got it fixed. Stops great whichever pedal/lever I use. I find myself using the lever way more than the pedal as a result.

Thoughts? Normal?


When all else fails, RTFM!

99 Valkyrie Interstate
82 GL1100 nekkid-ish
93 GL1500 Next!

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Johnrmont
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Motorcycle: 1996 GL1500SE White Pearl

Re: Fork dive, brake oddity

Postby Johnrmont » Sat May 23, 2015 8:51 pm

I have had Gold Wings since 1975 and I have predominantly used the front brake lever for the majority of my braking but I always have my foot on the brake pedal that I add a little bit of pressure to. Since the front brakes Provide the majority of stopping power it has always worked well for me plus I have the safety factor of adding more rear/front brake if necessary.
Previous Wings:
1975 GL1000
1976 GL1000
1984 GL1200 Aspencade
1985 GL1200 LTD

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moreira72
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Motorcycle: 1998 GL1500SE

Re: Fork dive, brake oddity

Postby moreira72 » Sun May 24, 2015 4:33 pm

FYI. When you apply the foot brake, it applies brake pressure to the rear wheel and to the left front caliper. That's why you feel the nose diving when you apply the rear brake. My 1998 Goldwing SE does the same thing.

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ct1500
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Re: Fork dive, brake oddity

Postby ct1500 » Mon May 25, 2015 6:21 am

Check that your left fork has the anti dive. Could be inop or simply the fork oil leaked out long ago.

Service the forks with new oil and recheck.
This is what I do
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Old Wing Man
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Re: Fork dive, brake oddity

Postby Old Wing Man » Mon May 25, 2015 9:13 am

I had an 84 GW and when applying the foot brake, I got absolutely no nose dive. I think you must have either a deficiency in the front/rear pressure sensor (divider) or maybe the different pads are applying more pressure, but I also suspect that your front shocks need servicing. You shouldn't get any or negligible nose dive while applying the rear brake only.

Earl43P
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Motorcycle: 82 GL1100, parked in Pa.
93 GL1500 Interstate DD
99 Valkyrie IS

Re: Fork dive, brake oddity

Postby Earl43P » Mon May 25, 2015 5:14 pm

It's as if when I squeeze the handle, anti-dive works.
When I use the foot pedal, anti-dive is non-existent.

I do get a lot of front fork travel when I accel/decel.
Considerably more than my Valk or my 82.
i just figured the PO put aftermarket springs in it.

Curious.
When all else fails, RTFM!

99 Valkyrie Interstate
82 GL1100 nekkid-ish
93 GL1500 Next!

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WingAdmin
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Re: Fork dive, brake oddity

Postby WingAdmin » Tue May 26, 2015 1:08 pm

Earl43P wrote:It's as if when I squeeze the handle, anti-dive works.
When I use the foot pedal, anti-dive is non-existent.

I do get a lot of front fork travel when I accel/decel.
Considerably more than my Valk or my 82.
i just figured the PO put aftermarket springs in it.

Curious.


It's more than likely that the anti-dive on the left fork isn't functioning correctly. That would explain exactly what you are experiencing. Have you checked the fork oil level - or recently flushed/changed the fork oil?

Earl43P
Posts: 50
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Location: Elizabeth City, NC
Motorcycle: 82 GL1100, parked in Pa.
93 GL1500 Interstate DD
99 Valkyrie IS

Re: Fork dive, brake oddity

Postby Earl43P » Wed May 27, 2015 11:37 am

No. I have not touched the forks whatsoever.

They probably do need serviced, the other oddity is how easy it is to bounce the front end using the throttle.

I need to pick up a manual for this machine.
I do all my own wrenching (therapy, I call it) but forks are an area where I have zero experience.
When all else fails, RTFM!

99 Valkyrie Interstate
82 GL1100 nekkid-ish
93 GL1500 Next!

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redial
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Re: Fork dive, brake oddity

Postby redial » Thu May 28, 2015 3:13 am

Sounds like you are about to raise that a little bit from zero. ;)
Len in Kapunda

The world is not going to finish today, as it is already tomorrow in Australia and New Zealand, and other islands of foreign nations such as Guam and Samoa.

Earl43P
Posts: 50
Joined: Sat Nov 01, 2014 7:15 pm
Location: Elizabeth City, NC
Motorcycle: 82 GL1100, parked in Pa.
93 GL1500 Interstate DD
99 Valkyrie IS

Re: Fork dive, brake oddity

Postby Earl43P » Sun Dec 13, 2015 3:16 pm

ct1500 wrote:Check that your left fork has the anti dive. Could be inop or simply the fork oil leaked out long ago.

Service the forks with new oil and recheck.


Had to replace the linked calipers pads. There is no anti-dive installed on that side, which explains the original observation. I do find myself using the brake handle harder than the pedal.

I've put 20,000 miles on it since April 7th. Bout time to service the rear spines. I'll replace the U joint boot then too. 130 miles a day. Like a tractor, set the throttle, go to work.

Having trouble with the pictures, but I 'll get them up.
When all else fails, RTFM!

99 Valkyrie Interstate
82 GL1100 nekkid-ish
93 GL1500 Next!

Earl43P
Posts: 50
Joined: Sat Nov 01, 2014 7:15 pm
Location: Elizabeth City, NC
Motorcycle: 82 GL1100, parked in Pa.
93 GL1500 Interstate DD
99 Valkyrie IS

Re: Fork dive, brake oddity

Postby Earl43P » Mon Dec 14, 2015 10:42 am

Look Ma, no Anti-dive!


Oh THERE it is, on the Un-Linked side.


Say, is this boot worn out?
When all else fails, RTFM!

99 Valkyrie Interstate
82 GL1100 nekkid-ish
93 GL1500 Next!

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MikeB
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Re: Fork dive, brake oddity

Postby MikeB » Mon Dec 14, 2015 6:04 pm

From what I see in the '93, '94 parts manual, the Interstate did not have a left anti dive assembly, only the right fork had this. However, the SE model had an anti dive assembly on both fork tubes.

If you have an Interstate that would be normal I think. But, if you have an SE, perhaps someone swapped forks with an interstate.
MikeB
Tacoma, WA, USA

Earl43P
Posts: 50
Joined: Sat Nov 01, 2014 7:15 pm
Location: Elizabeth City, NC
Motorcycle: 82 GL1100, parked in Pa.
93 GL1500 Interstate DD
99 Valkyrie IS

Re: Fork dive, brake oddity

Postby Earl43P » Thu Dec 17, 2015 7:56 am

Thanks Mike.

It is an Interstate, so it's normal.

There is only one air shock on the back.
I guess you buy the lesser model, you get the lesser equipment.
No reverse on it either, not that I would have wanted that.
I suppose it could be handy if you don't plan your parking spot properly.
When all else fails, RTFM!

99 Valkyrie Interstate
82 GL1100 nekkid-ish
93 GL1500 Next!

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Dusty Boots
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Re: Fork dive, brake oddity

Postby Dusty Boots » Thu Dec 17, 2015 9:06 am

You'd use the reverse more than you'd think you would!!! ;)




Especially in a gravel parking lot, where footing is not good.

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MikeB
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Re: Fork dive, brake oddity

Postby MikeB » Thu Dec 17, 2015 11:38 am

Earl43P wrote:There is only one air shock on the back.
I guess you buy the lesser model, you get the lesser equipment.
No reverse on it either, not that I would have wanted that.
I suppose it could be handy if you don't plan your parking spot properly.

All stock GL1500 Goldwings have only one "air shock". It is actually a load leveler and not a shock but they all came with just the one.
Progressive Suspension makes a set of air shocks to fit the GL1500 wings. They replace the existing shock installation. Model 416 I believe.
As to reverse, you can live without it if you don't have it.


MikeB
Tacoma, WA, USA


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