rear sprocket bearing $89.00 !!!! (05 640 Adv)

Discussion in 'Thumpers' started by rob748, Apr 25, 2006.

  1. Tseta

    Tseta Lost

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    No, they are the same for all the sprocket carriers. In fact, it seems that they've been the same ever since model year 1991...

    -T
    #81
  2. Ohffs

    Ohffs Adventurer

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    Nov 21, 2011
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    26
    Thought tooled the same. Thanks for the rapid reply
    #82
  3. Ohffs

    Ohffs Adventurer

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    #83
  4. Ohffs

    Ohffs Adventurer

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    Can we confirm that (25x52x20.6) is the correct size before I order. I don't have anything to measure my old bearing accurately enough.
    #84
  5. bmwktmbill

    bmwktmbill Traveler

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    It is late but this is what I see with a cheap plastic caliper

    I have an OEM bearing new.
    I am seeing 25X52X20.6 so not quite 21mm for thickness?

    KTM pt# 0625032057
    ball bearing 3205B-2RSTNG.

    bill
    #85
  6. Ohffs

    Ohffs Adventurer

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    Not late at all mate thanks for taking the time to measure it for me .
    #86
  7. tdreyer

    tdreyer KTiM

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    Used to live in Crestview FL, now ????
    Let us know how that goes :ear

    Noticed mine was rough last tire change.
    #87
  8. Ohffs

    Ohffs Adventurer

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    Nov 21, 2011
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    Will do. Rang a local firm who can source one at £35 plus vat but obviously of be able to collect it. Failing that simply bearings stock it a bit cheaper. Il get it within a week and update.
    #88
  9. NSFW

    NSFW basecamp4adv

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    :ear


    any more inputs and feedbacks?


    thanks.
    #89
  10. Ohffs

    Ohffs Adventurer

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    not really. I ordered the bearing from simply bearings and all has been well since
    #90
  11. Tooltech

    Tooltech Been here awhile

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    White Salmon, WA
    You do realize you are riding a motorcycle and not a personal water craft, by the way where is your PFD?:D
    #91
  12. rob748

    rob748 resident alien !!!!

    Joined:
    Jan 17, 2005
    Oddometer:
    825
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    traveling somewhere :)
    it was 2006 :) used a few bearings from BDI, price has doubled and the bike is getting ready for a full rebuild
    #92
  13. NSFW

    NSFW basecamp4adv

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    mine is from a 2002, the carrier not turning smoothly, there's some resistance, and somewhat crunchy.

    pushed bearing out, it's made by NSK (germany), # 6205 B2RSR2NG. the OD is 2.0465-2.0470. the bearing itself turns smoothly and no play.

    anyway, since it's 2 years old and over 6k miles, i decided to get a new bearing. JAF 6205RS (made in japan @ $30). same OD as the NSK 6205.

    i checked the ID of the carrier, 2.0442-2.0445...:huh

    based on the above numbers, the interference is over .002. that's a lot....:eek1

    that explains why the bearing was tight. the outer raceway was getting crushed causing it to collapse.

    we do a lot of press fit bearing installation here and the typical interference is .0005 - .001.

    does anyone has an uninstalled oem ktm bearing ? OD? :ear

    what's the ID of your carrier? :ear

    my next move is machine the ID of the carrier by removing .001 of material.
    #93
  14. overlandr

    overlandr Dystopist

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    Bump the above post.
    #94
  15. NSFW

    NSFW basecamp4adv

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    machined the bore to 2.0460, installed the bearing went smoothly (not slip fit). i even balanced the tire afterwards, and i can tell it was spinning with little friction and finding the off balance at the same spot again and again.

    already did 2k miles and so far so good.
    #95
  16. meat popsicle

    meat popsicle Ignostic

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    Doing some lite maintenance recently I noticed my rear wheel had noticeable play when installed - should there be any play or should it be tight? The discussion I usually found was for what I think's called axial play (left/right movement along the axle); mine does not seem to move axially, but it does wiggle with what I'm thinking's called radial play (like an airplane banking to turn).

    I'm not sure how to measure play but if there's a spec please also explain how to measure it.
    #96
  17. Droptarotter

    Droptarotter Long timer

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    Hey Meat..................that wheel should be tight. Any way you forgot to install a spacer???
    If not, you have a bearing going.

    Cheers
    #97
  18. meat popsicle

    meat popsicle Ignostic

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    I don't think I did (its been thousands of miles since I had the rear wheel off - yikes). I guess its time to contact Steinhouse Racing...
    #98
  19. scottcolbath

    scottcolbath Long timer

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    I think I found the correct sprocket carrier bearing for my 2005 640, for $40. I'll be picking it up next week. I do have a question.

    Is there a proper order in which to remove and install the new bearing and bushing? Should I knock out the whole bearing/bushing combo in one part, then install the new bearing alone, followed by the bushing? Or, should I press the bushing into the bearing, then install the assembled parts into the sprocket carrier?

    S.C.
    #99
  20. bmwktmbill

    bmwktmbill Traveler

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    Bump for this.

    I am traveling so I can't look at my parts book.

    Darned if I remember a bushing. If you use a heat gun things will go easier.

    Freeze the bearing to install.

    Anyone else?

    bill