Converting my XT660Z front forks to USD Single Disc, will braking be affected?

Discussion in 'Thumpers' started by swanny199, Jan 4, 2013.

  1. swanny199

    swanny199 Adventurer

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    im looking at getting a new set of front forks for my tenere but the only thing holding me back is the braking, would it be weaker if i go from dual discs to one disc... i do alot of commuting and i dont want to upgrade my suspension if the brakes will be weaker than standard.
    #1
  2. ramar

    ramar Adventurer

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    It will be affected 100%. I did this convertion more you can read and see the pictures here:
    http://advrider.com/forums/showthread.php?t=423225&page=83&highlight=xt660z

    At the moment I run a standard YZ 250mm single brake rotor, It's ok for me but I am not a fast rider. I plan to change it with oversize 270mm or better 320mm, than it shoud be much better but still far away from the stock brakes.
    I hope this will help.
    #2
  3. gnuttis

    gnuttis Been here awhile

    Joined:
    Nov 29, 2009
    Oddometer:
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    SWEDEN
    KTM 690 Enduro R
    Dry weight:
    138.5 kg (305.3 pounds)

    Yamaha XT660Z Tenere
    Dry weight:183.0 kg (403.4 pounds)

    Yamaha XT660R

    Dry weight:172.0 kg (379.2 pounds)

    Yes is a pretty difference but XT660R only go with one 298mm disc & one brake. My KTM 690 Enduro R fork is shipped from Germany & will arrive soon. I,am going to use KTM 300mm disc with Yamaha XT660R orig brake. 320mm is to big for offroad use unless you will use motard wheels.
    #3
  4. ramar

    ramar Adventurer

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    You are wright, 320mm is to big for off road.
    #4
  5. swanny199

    swanny199 Adventurer

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    Thanks for the advice, the XTZ wet is another 22kg coz the tanks got huge capacity.. I recently bought Ohlins springs, stainless braided lines and a 21' excel rim to replace the OEM front made of cheese. I was kinda wishing i went with USD forks for improved handling offroad but i cant be fucked losing braking power.

    Looks like im sticking with the original fork setup, keepin it old school haha

    thanks for the advice everyone :beer
    #5
  6. gnuttis

    gnuttis Been here awhile

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    Nooooo don,t do it you will miss options like comp and rebound settings if you like to take you XTZ to next level you will regret you didn,t test it.
    #6
  7. swanny199

    swanny199 Adventurer

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    Iv done some more research and the BMW F650 GS weighs 199kg or 438 lbs WET and its only using a single 300mm disc.. So the USD forks with a 300mm Disc and a good brembo should be up for it.
    #7
  8. gnuttis

    gnuttis Been here awhile

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    Yes I got same settings for my XT660R with a WP fork from a 690 and same brakedisc and caliper from 690. When I,am complete done I Will post pics. There are some in xt660.com forum.

    Skickat från min HTC One V via Tapatalk 2
    #8
  9. Evil Invader

    Evil Invader Been here awhile

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    The KTM Super Enduro is heavier, has (a LOT) more power, and uses only one brakedisc up front. Works like charm.
    Just saying....:deal


    :1drink
    #9
  10. dashmoto

    dashmoto Serial Tinkerer

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    A single 270mm disc will lock a knobbly front tyre on tarmac. How much more braking power are you going to use? If you run road tyres you might be able to make use of some of that extra power I suppose, but I'm usually wearing out knobblies that are too worn for serious dirt use.

    What you lose in power you gain in feel - one disc and an EXC master cylinder works much better on the dirt than the wooden stock setup.

    I commute through Nottinigham and Derby daily on mine, and I've not died yet.
    #10