Anti Dive - and Fork springs Question


Information and questions on GL1500 Goldwings (1988-2000)
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bri720a
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Anti Dive - and Fork springs Question

Post by bri720a »



My 98 1500SE it has the anti dive on both forks. However it is only working when I use the brake pedal (so the left side is working?). When I only use the hand brake I can significantly bounce the front forks (when parked in the garage). Is there anything I should check or do?

I was going to replace the fluid in the forks but I would doubt that will fix the issue. If I have to rebuild the anti dive can I leave the forks on the bike and remove the valve while the bike is on the jack?

I have read everything I can find on the anti dive but nothing specifically talking about only one side working.

This bike is new to me. I have done a lot of work but I have not touched the front forks besides checking the air pressure in them. Is there a way to check the springs in them with out disassembling the forks? I don't want to pull them if they are not leaking etc.

Thank you for your help!

Brian


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MikeB
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Re: Anti Dive - and Fork springs Question

Post by MikeB »

Sorry to say but you should remove the forks anyway. They most likely need to have the fluid changed and the proper way to do that is to remove them, empty them and clean them out.
MikeB
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modou
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Re: Anti Dive - and Fork springs Question

Post by modou »

I have a '99 GL1500 SE, and I replaced my stock springs with progressive springs from cyclemax.com. How did you determine that your bike has a "anti-dive" feature and what does the parts or assembly look like :?:
bri720a
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Re: Anti Dive - and Fork springs Question

Post by bri720a »

When looking at the bottom of the forks the caliper is bolted to the anti dive valve.
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thebruce
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Re: Anti Dive - and Fork springs Question

Post by thebruce »

On my '91, if I recall correctly, only one anti-dive had the internals to make it function, where both sliders had the external hardware to suggest both brakes had anti-dive.

If your budget allows, progressive springs and Honda bushings and seals make for a good time. 10 to 15w fork oil and all is groovy.
It doesn't matter what you ride, as long as you have your knees to the breeze.
modou
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Re: Anti Dive - and Fork springs Question

Post by modou »

Do you have a picture?
mickster
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Re: Anti Dive - and Fork springs Question

Post by mickster »

You will probably get better results by changing the fork springs.

For my bike it was night and day difference.
the_big_h
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Re: Anti Dive - and Fork springs Question

Post by the_big_h »

I don't think you can confirm the operation of the Anti-Dive in the garage: The anti-dive valve is actuated by the reaction force of the brake caliper from the braking friction against the rotor. If the front wheel is not turning, there is no braking happening, so the anti-dive valve will not be activated.
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WingAdmin
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Re: Anti Dive - and Fork springs Question

Post by WingAdmin »

the_big_h wrote: Tue Aug 03, 2021 11:51 am I don't think you can confirm the operation of the Anti-Dive in the garage: The anti-dive valve is actuated by the reaction force of the brake caliper from the braking friction against the rotor. If the front wheel is not turning, there is no braking happening, so the anti-dive valve will not be activated.
You can, you'll just have to find a way to lever the bottom of the caliper so that it compresses the anti-dive piston. But pretty tough to do that and to then compress the forks with enough velocity to actually notice a difference.


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