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Thread: oh maaan.. sx rear brakes.

  1. #1
    Join Date
    Jul 2004
    Location
    Mud hill. close to water !
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    3,658

    oh maaan.. sx rear brakes.

    Damit.. ( not the username.. but the curse !!)

    I think i got screwed on my rear brakes....

    I bought a rear brake drum for my 85 SX from e-bay. listing said it was an 85 model..

    I'm reading my clymer manual, and i hope it's wrong, cuz it says that only the 86 model year had a double bearing in the brake drum/hub !!.. the one i got does.. and my SX is an 85.

    Can anyone confirm this for sure. 100 %.. PLEASE..

    and if so.. anyone for one for trade ?!!

    ps: Any chance the hubs interchange and the drums be the same ?
    Currently :

    82 ATC - 200, plain jane, almost mint. ( Sold, 03-17-2005)
    84 ATC - 200 ES, Jimmy-Rigged, don't ask.( Sold, 03-17-2005)
    85 ATC - 250 SX, Pride and Joy, Bottom-Less Money Pit.
    84 125 M - The Mini-SX not running yet. but won't be long.
    --

    The more people i meet.. the more i like my DOG !

  2. #2
    Join Date
    Dec 2004
    Location
    Pa.'s Highest City
    --
    8,058
    I know my old 250sx had 2 wheel bearings on each side. I know cause I had to replace them and I thought wtf? I remember cause it cost me like $120.

  3. #3
    Join Date
    Jul 2004
    Location
    Mud hill. close to water !
    --
    3,658
    was yours an 85 or 86 ??
    Currently :

    82 ATC - 200, plain jane, almost mint. ( Sold, 03-17-2005)
    84 ATC - 200 ES, Jimmy-Rigged, don't ask.( Sold, 03-17-2005)
    85 ATC - 250 SX, Pride and Joy, Bottom-Less Money Pit.
    84 125 M - The Mini-SX not running yet. but won't be long.
    --

    The more people i meet.. the more i like my DOG !

  4. #4
    Join Date
    Dec 2004
    Location
    Pa.'s Highest City
    --
    8,058
    Sorry, I forgot to mention that. It was an 85'

  5. #5
    Join Date
    Jul 2004
    Location
    Mud hill. close to water !
    --
    3,658
    Clymer Quote Page 436:

    Rear Axle/ Brake Panel Bearings
    (Fourtrax 250, 1986 ATC 250SX Models )

    These are the only 250 cc models that are equipped with bearings in the brake panel. All other 250cc models have the bearings located in the right-hand axle bearing housing. wich is covered in chapter eleven.

    ....

    So, does this mean that the 86 have the bearings directly in the brake hub ? after reading this a few more times.. i think this is the case.. so i'm ok in that case, because mine are in the splined hub and the brake drum is mounted to this......

    make sense?
    Currently :

    82 ATC - 200, plain jane, almost mint. ( Sold, 03-17-2005)
    84 ATC - 200 ES, Jimmy-Rigged, don't ask.( Sold, 03-17-2005)
    85 ATC - 250 SX, Pride and Joy, Bottom-Less Money Pit.
    84 125 M - The Mini-SX not running yet. but won't be long.
    --

    The more people i meet.. the more i like my DOG !

  6. #6
    almac16 is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Jan 2004
    Location
    Halifax, Nova Scotia, Canada
    --
    226
    Can't you just take the old one off and see if they match up? I have an 85 and 86 sx, but I can't remember

  7. #7
    Join Date
    Mar 2004
    Location
    Newnan, GA / Near Atlanta
    --
    1,727
    The 86 is different. The drum itself looks different. and on the back side it looks a bit different. They made this change to keep water out of the brake drum. Go to bike bandit and look at the schematic on the 85 and 86 you will see the difference immediately. The 86's swing arm assembly is completely different also. The 85 does have bearings on the inside and out. Hope this helps. Oh yeah, the BigRed is the same way.
    Clay Whitman
    Newnan, GA

    AMSOIL DEALER

    My Toys

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  8. #8
    Join Date
    Oct 2002
    Location
    Northeast
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    17,462
    The 85 has 2 bearings back to back in a removable hub that bolts to the brake backing plate. As mentioned above, the 86/87 is entirely different and the outer visible cover ITSELF does not rotate but the 85 drum does rotate visibly.

    Both years have bearings in the backing plate area, not in the drum itself.

    There are like 7 different Big red, 250SX, 250ES style rear ends. Lots of differences but the swingarm itself gives it away.

    Can you see your drum turning? 85

    Is it enclosed? 86/87 and the swingarm doesn't look so heavy and bulky as the 85.
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country

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