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Thread: Disable Anti Dive?

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    Robert RobbieAG's Avatar
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    Disable Anti Dive?

    I ordered straight rate springs from Traxxion Dynamics and went to install them today. On the instructions it states "Disable anti-dive by removing washers and spring from the tip of the damper rod." I'm inclined to to do as they say, but wanted to get other's opinions. The service manual shows 2 springs - a rebound spring and an oil lock valve spring. I'm thinking I need to remove both and all the associated washers etc. (parts # 4 - 9 on page 13-18 in the service manual). Also, I'm have a difficult time getting the bolt out at the bottom of the fork (left fork with damper rod), and I'm afraid I'll strip the head. Anybody have a tip on how to get this out? I'm tempted to just leave the anti-dive alone and move on, but think it's best to follow their instructions.

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    L Plate Rider TerryS's Avatar
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    Re: Disable Anti Dive?

    The damper rod bolt is the toughest little sucker sometimes. If you had access to an impact driver that is the best tool to use to shock the threads into submission. There's probably some threadlock on it too, so a bit of heat (e.g. propane torch to the bolt head) will help things along.

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    RaYzerman's Avatar
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    Re: Disable Anti Dive?

    I haven't done ST forks, but I know Goldwing owners have been known to disable the anti-dive. It's a different method on those and can be done externally. I'd say do it if you can, but it you don't that's OK too.

    As far as removing the lower bolt, as Terry says, air impact works very well with shock and speed. I leave the forks fully assembled to keep the spring preload on the cartridge, sometimes have had to get a helper to compress the fork (in a vice) then remove the bolt. Put a small piece of plywood on your chest, grab the fork lower and compress it. Use a good hex socket in the bolt so you don't strip out the head.
    Ray

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    Robert
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    Re: Disable Anti Dive?

    Quote Originally Posted by RaYzerman View Post
    As far as removing the lower bolt, as Terry says, air impact works very well with shock and speed. I leave the forks fully assembled to keep the spring preload on the cartridge, sometimes have had to get a helper to compress the fork (in a vice) then remove the bolt. Put a small piece of plywood on your chest, grab the fork lower and compress it. Use a good hex socket in the bolt so you don't strip out the head.
    I should have loosened it before disassembling the forks, but I didn't realize I was going to need to. I did on my other bike (ST1300) when I did springs on it and was able to loosen it, but it turns out I didn't need to. I'm using an allen wrench with a 6mm socket and extension for leverage. That won't work with an impact gun due to the 90 degree angle. I may need to get an extended socket. It may be too late already as there's a bit of play now. It looks like it's brass so deforms easily.

    Another question - what do you guys use to attach the cartridge rod on the right fork to the fork cap? That thing is a royal pain! A couple years ago I replaced the fork oil and I needed two helpers to do it - one to hold the rod up with a coat hanger, and one to slip the slotted washer in while I compressed the spring.

    Another thing Traxxion recommended was ditching the slotted washer. I have no problem with that!

  5. #5
    L Plate Rider TerryS's Avatar
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    Re: Disable Anti Dive?

    I use a bolt (about 3") which fits the locknut threads, and screw this onto the damper rod. That makes it a lot easier to fish out of the fork leg and gives something solid to grab onto. Then drop the springs and flat washers and spacer into the leg, and pull the bolt up (might need a magnet to lift it up enough to grab), compress the spring by hand and slip the slotted washer into place to hold it all together. Then remove the bolt, wind the locknut down fully on the rod, then fit the fork cap.

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    Robert
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    Re: Disable Anti Dive?

    I decided to send the forks to Traxxion to disable the anti-dive, install the springs and do a full service on them. Hopefully I'll have them back in about a week.

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    Life Is Good! John OoSTerhuis's Avatar
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    Re: Disable Anti Dive?

    I don’t get it. Why disable the anti-dive if just replacing the fork springs....?

    What am I missing...? TIA

    John
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    Robert
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    Re: Disable Anti Dive?

    Quote Originally Posted by John OoSTerhuis View Post
    I don’t get it. Why disable the anti-dive if just replacing the fork springs....?

    What am I missing...? TIA

    John
    I followed up with Traxxion after I had trouble with the bolt at the bottom and stripped the head asking if it would be a big deal to leave it alone. Here's their response:

    "With the stiffer fork springs the antidive is not needed or helpful."

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    Life Is Good! John OoSTerhuis's Avatar
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    Re: Disable Anti Dive?

    Quote Originally Posted by RobbieAG View Post
    I followed up with Traxxion after I had trouble with the bolt at the bottom and stripped the head asking if it would be a big deal to leave it alone. Here's their response:

    "With the stiffer fork springs the antidive is not needed or helpful."
    Thanks for the reply. Not sure I believe it. Looking at the fork schematic I wouldn’t know definitively what parts they what you to remove to “disable” it. What about the anti-dive unit itself?, there’s a spring in there too...

    Are you supposed to also freeze the left caliper somehow so it no longer rocks during hard braking to activate the anti-dive normally?

    John
    Last edited by John OoSTerhuis; 11-16-2017 at 11:04 PM.

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    Robert
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    Re: Disable Anti Dive?

    Quote Originally Posted by John OoSTerhuis View Post
    Thanks for the reply. Not sure I believe it. Looking at the fork schematic I wouldn’t know definitively what parts they what you to remove to “disable” it. What about the anti-dive unit itself?, there’s a spring in there too...

    Are you supposed to also freeze the left caliper somehow so it no longer rocks during hard braking to activate the anti-dive normally?

    John
    I wasn't sure exactly what to remove to disable the anti-dive from their instructions. I had questions written to send to them but never bothered when I ran into trouble. I know one of their specialties is Goldwing suspension, and I imagine a lot of what they're recommending is based on that, since it uses anti-dive as well.

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