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  1. #1
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    DUC 32 bottoming out too easily

    I bottom out my DUC 32 to easily. I am about 215 with all my gear on. I am thinking of changing to 10- 15wt oil but also want to get a stronger negative spring also either the 6 Nm or the 7 Nm spring, but I cant find any one who sells them.

    Any heavier riders have some recommendation on a good set up?

  2. #2
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    Bottoming out mean too little pressure and the spring won't help that will it? The negative spring is so you can run higher pressure and it still feels plush right?

    Anyway I have a 6NM spring in mine, but it came that way.

  3. #3
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    What air pressure are you running?
    Is the damper cartridge pressurized?
    There is no 7nm spring.
    Quote Originally Posted by mikesee
    Better suited to non-aggressive 125# gals named Russell.
    I ride so slow, your Garmin will shut off.

  4. #4
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    Yes there is 60 psi in the damper along with 5wt oil filled from 63mm from the top. In the air/spring side it is a 140psi. As for the 7 Nm spring I was just going of the fork setup manual on the site which shows that there is (or at least was supposed to be) one at 7 Nm. thanks

  5. #5
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    i just happened to have 2 of my forks apart yesterday and was looking at the manual and tips ...

    you can run up to 160psi for the air spring, and you can also add oil under the air piston on the same side of the fork to increase the progression.

    as you apparently already know, on the damper side you can use a heavier oil to slow everything down.

    it's all in the tuning chart for the maverick forks. you can also look here for further tips - i'm not sure what increasing the pressure in the damper cartridge does, maybe someone else can enlighten us ...

    ragetty

  6. #6
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    You can also harden the oil flow by modifying the shims stack and increase the pressure in the bottom chamber of the damper cartridge and add fox fluid in the bottom of the air cartridge until 18ml. You seem to be in a "light rider" configuration.
    Maverick ML7.2 / SC32
    Maverick ML7.5
    Maverick Durance / Duc32
    Maverick ML8 / BOS Devile

    French Maverick Breeder

  7. #7
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    Quote Originally Posted by ryan2100
    Yes there is 60 psi in the damper along with 5wt oil filled from 63mm from the top. In the air/spring side it is a 140psi.
    I would recommend that you bump the pressure to 80psi with 7w Fox fork oil in the damper then re-ride. 140psi is fine.
    Quote Originally Posted by mikesee
    Better suited to non-aggressive 125# gals named Russell.
    I ride so slow, your Garmin will shut off.

  8. #8
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    I will try the 80 psi and the 7wt fluid and see how that works, thanks for all the help
    Ryan

  9. #9
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    I weigh 240. I rebuilt my 100mm "Travis Brown DUC" using the manual, with 15 wt oil, higher pressures and the modification to the shim stack specified for heavier riders. I left out the stronger negative spring, because I was trying to get away from "over-plush" at the top of the stroke. Redone, the fork isn't "platform" at all, but is smoother, firmer and has a slightly perceptible effect with the damper adjustment. It no longer bottoms out on regular hits and rides much better.

    Easy fork to work on, if you've got a vise and some room.

  10. #10
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    The heaviest 6Nm negative spring used with lower air pressures, 115 psi+/- will allow more brake dive and more supple small bump sensitivity
    Quote Originally Posted by mikesee
    Better suited to non-aggressive 125# gals named Russell.
    I ride so slow, your Garmin will shut off.

  11. #11
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    What do the various bits do?

    Might sound like a dumb question (I'm good at those) but I would be interested in a brief primer on what the changing various elements of the DUC32 actually does in terms of suspension performance

    ie heavier oil in the damper cartridge means faster / slower damping

    For an enthusiastic amateur this would be invaluable as I try different things to change the characteristics of my fork. It is also information I don't know and I don't like not knowing this type of thing for the equipment I own

    Greater air pressure in the air cartridge means
    Heavier negative spring means
    Changing shim stack going down through the tuning table means
    Heavier oil in the damper cartridge means
    Greater air pressure in the damper cartridge means
    60mm vs 63mm vs 65mm in the damper cartridge means
    Greater oil volume in the air spring cartridge means less linear compression rate


    I recognise it is also the interaction of these characteristics that is just as important and any advice given is gratefully received.

    Thanks

  12. #12
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    fantastic idea - this should just be passed down the thread and expanded upon as appropriate:

    1. greater air pressure in the air cartridge means:
    less sag and more bottom-out protection;

    2. heavier negative spring means:
    a plusher fork, plus better small bump compliance for a given air pressure (see 1); too much negative spring for too little air pressure and the unweighted fork sits below maximum travel (also effectively lowering axel-crown height);

    3. changing shim stack going down through the tuning table means:
    greater shim stack "inversion" means ... ;

    4. heavier oil in the damper cartridge means:
    slower compression and slower rebound range; a "harder" climbing mode;

    5. greater air pressure in the damper cartridge means:
    same as 4? where are the differences?

    6. 60mm vs 63mm vs 65mm in the damper cartridge means:
    lower for more "real spring feeling", more for ... ?!?

    7. greater oil volume in the air spring cartridge means:
    less linear compression rate & a more rapidly progressive spring action;

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