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Help New connecting rod bearings for FZR250/FZX250

Discussion in 'Yamaha 250cc In-Line 4's' started by CompeyRom, Jan 29, 2015.

  1. CompeyRom

    CompeyRom Active Member

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    Greetings. I have found some time lately to continue my engine overhaul and noticed one thing: the conrod bearings that I've ordered from Webike differ a lot from those that came from the engine. New ones are very tight to put in place but seem to fit eventually. The packaging looks like any genuine Yamaha part. Part number is 1HX-11656-20 and it matches the parts diagram. A Webike packaging mistake, wrong bearings from someone tinkering with my motor or tricky stuff from Yamaha? What do you think?
    Bearings.jpg
     
    CompeyRom, Jan 29, 2015
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  2. risky

    risky risky

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    look different width,s to me.
     
    risky, Jan 29, 2015
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  3. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Doesn't look right to me. Maybe take them to a bearing place?
     
    Linkin, Jan 29, 2015
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  4. Moo

    Moo Plodge Racing!!!

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    thats a massive difference.........i wouldn't be happy with that.....
     
    Moo, Jan 29, 2015
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  5. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    They are the third size shells, are they the ones you want?
    If they came in sealed Yamaha packaging then I doubt that they are incorrect.
    Does your motor show any signs of having been apart before?
    If it is a new version from Yamaha then I think the part number should be be 1HX-11656-21
     
    maelstrom, Jan 29, 2015
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  6. CompeyRom

    CompeyRom Active Member

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    Yep, wanted third size, brown color code and right on with the part number info. I looked deeper and it appears that the previous owner machined down all crankshaft rod journals by about 0.5mm and fitted these unknown bearings to compensate. The new parts I have on my hands are legit. I think the case can be closed now! It would be nice to identify the old ones though...
     
    CompeyRom, Jan 31, 2015
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  7. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Well done Compey. I wouldn't bother identifying the old ones the Yamaha part will most likely be better quality.
     
    maelstrom, Jan 31, 2015
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