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Help FZR250 Transmission bearing and other questions

Discussion in 'Yamaha 250cc In-Line 4's' started by ruckusman, Sep 23, 2019.

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  1. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    This one may be a good candidate, centreless grind down the outer diameter and cut the NR ring in the appropriate location for the extra race width and use a thinner oil seal to compensate the extra width if available - it's not cheap though but should be well and truly up to the task

    https://au.rs-online.com/web/p/ball-bearings/1959540/
     
    ruckusman, Feb 2, 2020
    #41
  2. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    The ID, OD & width all need to be modified. A double row ball is fine. There is no significant axial load to justify angular contact. I am sending the OEM bearing as a sample and all going well will have them in about 6 weeks.
     
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    maelstrom, Feb 2, 2020
    #42
  3. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    my67xr, Apr 4, 2020
    #43
  4. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    Interesting listing, when I saw the email come in I was all excited, until I saw the dimensions of the bearing

    The actual bearing required is 22x50x20.6 for the sprocket end, which thanks to @maelstrom we know for sure as he's managed to get one off of the shaft

    However now that I think about it, it may be for the other/clutch side end, but that one is supposed to have a locating ring

    I'll check tomorrow, but I already have the other three bearings
     
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    ruckusman, Apr 4, 2020
    #44
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