Any 1800 Owners Tried This Product?

[msrvpeig]

Saw this product on another board. Looks interesting. Anybody tried it and if so can you provide some feedback?

motomfg- Ducati tools and quality billet accessories,

 

[Mick]

I put one on mine a couple of years ago. It tidys up the forks nicely and shims the ADV at the same time and looks factory. But if you do it I dont recommend keeping the stock fork springs. Ive Traxxion springs in mine so even when I lean on the brakes the forks dont dive. Stock 1800 springs are too weak.

 

[Ozarkryder]

What it does is seperate the 2 halves of the Anti-Dive valve on the front fork, preventing the plunger in there from actuating the anti-dive. Most who do this report a softer, less jarring ride over bumps. You don't need to get a $17 shim, a few washers and maybe an o-ring will work. Some have used a piece of PVC pipe, some have cut off the end of the plunger with a Dremel. I have read that some just loosend the bolts holding the 2 sides of the valve together. As Mick said, most have recommended replacing the front springs, but most folks here seem to do that when they add the rake kit anyway.
Fred Harmon, the GW guru, has an informative how-to post on another forum along with discussion from folks that have done the mod or others that are aghast that some would change Mother Honda's perfect design. (I take it that most on this board aren't in that camp, as we have changed the design radically by adding the trike kit. )
Warning: this link will take you to another forum.

Disabling the anti-dive valve 101

 

[Stephen]

Or you could just unbolt the upper half of the anti dive valve put in two flat washers then reinstall the upper half. Total cost about a nickle.

 

[Konrad]

Or you could just unbolt the upper half of the anti dive valve put in two flat washers then reinstall the upper half. Total cost about a nickle.

Will someone please explain to this incompetent what we're talking about here and what the advantage of the alteration is?????

 

[Stephen]

Will someone please explain to this incompetent what we're talking about here and what the advantage of the alteration is?????

Mounted to the left fork is an engineering feat of amazement, it's called the anti dive valve (GL1800). This device is suppose to keep your front end from diving when you apply the front brake but in many cases this anti dive valve sticks and when it does the front shocks stick too. It's like you have no shocks up front. So what people do is disable the anti dive valve so it can't stick any more.

 

[Ozarkryder]

Or you could just unbolt the upper half of the anti dive valve put in two flat washers then reinstall the upper half. Total cost about a nickle.

Take a 7/32" drill and put a hole through the middle of a nickle. Install the nickle between the halves of the Anti-Dive Valve, and the valve is disabled. Cost = nickle.

In the Fred Harmon post, Disabling the anti-dive valve 101 it is mentioned that the ADV is a Mother Honda work-around to stop the front end pitching down when the brakes are applied due to weak OEM fork leg springs . Thing is the ADV is on with the brakes on. Hit a bump while braking and you get jarred because the front suspension is nearly locked up. Some folks will trade some occasional dive for a softer ride.

On our trike conversions this may not come into play depending on what the conversion does to the braking system, or how a rake kit changes the suspension. Our Champion no longer has the front and rear brakes linked, so hitting the rear brakes shouldn't actuate the ADV. I did the nickle thing just to make sure, and it seems to ride a bit softer, but that may just be in my head, knowing something has been done, so there must be a difference.

 

[Stephen]

There's different ways to disable the anti dive valve, pick one. Fred also does a video (I think) on how to fix the ADV but I don't think it's permanent fix. Probably have to take it apart again and again and keep cleaning it.

 

[Konrad]

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<img src="images/misc/quote_icon.png" alt="Quote" /> Originally Posted by <strong>Stephen</strong>
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<div class="message">Mounted to the left fork is an engineering feat of amazement, it's called the anti dive valve (GL1800). This device is suppose to keep your front end from diving when you apply the front brake but in many cases this anti dive valve sticks and when it does the front shocks stick too. It's like you have no shocks up front. So what people do is disable the anti dive valve so it can't stick any more.</div>

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</div><font color="red">Got it! Thanks for that clear explanation.</font><br />
<font color="#ff0000">On our Roadsmith kits has the ADV been disabled?</font><br />
<font color="#ff0000">Has the Roadsmith installation in any way altered the braking system?</font>

 

[Stephen]

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<img src="images/misc/quote_icon.png" alt="Quote" /> Originally Posted by <strong>Konrad</strong>
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<div class="message"><font color="red">Got it! Thanks for that clear explanation.</font><br />
<font color="#ff0000">On our Roadsmith kits has the ADV been disabled?</font><br />
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<font color="Blue">NO.</font><br />
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<font color="#ff0000">Has the Roadsmith installation in any way altered the braking system?</font><br />
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<font color="Blue">Yes, Roadsmith has parts in the kit that put an end to the rear brakes actuating the front brake. Amen and thank you Roadsmith. Trying to bleed the brakes on a GL 1800 with the linked braking system is a real pain in the ass.</font></div>

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