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  1. #1

    Where to buy Koyo bearings (pump)?

    Where do I buy (In the US) the Koyo bearings below:

    Front Bearing Koyo 6303R-6RD P/No 920453740 OEM
    Rear Bearing Koyo 62/22RS P/No 920453743 OEM
    Jet Pump Seals x3 P/No 920493739 OEM

    I am assuming I would need to buy the pump seals from Kawasaki.

    Thanks,


  2. #2
    www.eastcoastpwc.net Scott's Avatar
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    Quote Originally Posted by creativepuzzle View Post
    Where do I buy (In the US) the Koyo bearings below:

    Front Bearing Koyo 6303R-6RD P/No 920453740 OEM
    Rear Bearing Koyo 62/22RS P/No 920453743 OEM
    Jet Pump Seals x3 P/No 920493739 OEM

    I am assuming I would need to buy the pump seals from Kawasaki.

    Thanks,
    Dealer

  3. #3
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    if you want oem go to the dealer... if you want aftermarket go a search on the bearing number.

    i got mine on the cheap searching the web.


    scott and tomgtv each have a set of the bearings i have used

  4. #4
    www.eastcoastpwc.net Scott's Avatar
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    Quote Originally Posted by Region8Ultra250X View Post
    if you want oem go to the dealer... if you want aftermarket go a search on the bearing number.

    i got mine on the cheap searching the web.


    scott and tomgtv each have a set of the bearings i have used
    you did. The price I believe increased and on back order.

  5. #5
    Koyo bearing is the same as OEM bearing right? When I put in 6303R-6RD in the internet, nothing pop up except Greenhulk and 250xtech references. I find 6303R on koyousa website, but not 6303R-6RD. I will call the distributor. If Koyo is not OEM bearing, then I will just use OEM.

    Thanks,

  6. #6
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    assuming they are for an ultra 250x

    92049 is the pump seal x3

    6303R-6 is one bearing which can be found here http://speedsupplies.com/partslistin...00&category=KW

    62/22 2Rs is the other bearing which can be found here

    http://www.vxb.com/page/bearings/PROD/Kit6972

  7. #7
    nicjak's Avatar
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    we have all been there done that front oem bearing is special build and rated slightly higher rpm than sourcing a similar bearing from same manufacturer rear bearing is fine to source elsewhere dont waste your time as we all have.

  8. #8
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    Quote Originally Posted by nicjak View Post
    we have all been there done that front oem bearing is special build and rated slightly higher rpm than sourcing a similar bearing from same manufacturer rear bearing is fine to source elsewhere dont waste your time as we all have.
    i have sourced mine online and haven't had any problems.... they have been in for two season now.... bearings match up number for number per the online parts finder

  9. #9
    nicjak's Avatar
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    from memory oem rated at 15000rpm, others are only 13000rpm after all its your choice but mine and other bearing suppliers wouldn't support there product lasting and we did get a personal letter from the bearing manufacturer suggesting we continue to use the oem as it had the taller rating. jet250 has the letter

  10. #10
    You guys may want to consider things other than bearing dimensions and rpm. 10 grand isn't high for a ball bearing of that size, that'd be the least of my worries. Bearings of a similar dimension and generic PN can have a different ball count, different cage material etc. What is extremely important is the axial loading potential of the bearing. Some radial bearings take higher thrust loads than others and install in a directional nature to load properly. I'm thinking they may use some kind of angular contact bearing to handle impeller thrust loads. Considering all the complaining about ultra pump bearings taking out engine crankshaft thrust bearing area I'd be very critical with bearing selection. If you don't know for sure go OEM.

    RT

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