09 505 sx looking for engine
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Thread: 09 505 sx looking for engine

  1. #1
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    09 505 sx looking for engine

    my 2009 505 sx blew up, the cases were damaged the, crank is broke not much can be used. anyone know of a rebuildable motor that's available??

  2. #2
    Senior Member KTMATVHQ Member
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    There was one on Facebook the other day.

  3. #3
    Senior Member KTMATVHQ Guru
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    FYI don't buy one from a dirt bike. They look very similar, but are different.
    Mine:
    2017 Husky FX 450
    2009 505 SX
    2008 525 XC-modded for mx (currently 450 cylinder)
    Dad's:
    2009 450 SX
    2008 450 XC
    2008 540 XC

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  5. #4
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    Which engine would you suggest guys for replacement? I’ve seen so many suggestions on the hybrid forum on Facebook - 2stroke 300CC, LC4, yzf450, etc.

  6. #5
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    What about a Polaris 525 motor from the later models? not as good as a 505 but you’d get reverse and you can build them up pretty easy to make a lot of power.
    See them going cheap quite often(compared to the KTMs anyway).
    And wouldn’t require fabrication of mounts and who knows what else, unless your into that...if so than o vote 300 2 stroke! Lol

  7. #6
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    I have a running 505 motor I’m about to pull and swap in a Trx250r motor. Can send video of it running before I pull it if your interested. I’m in Pennsylvania

  8. #7
    Senior Member KTMATVHQ Guru
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    Quote Originally Posted by Linemanbobby View Post
    What about a Polaris 525 motor from the later models? not as good as a 505 but you’d get reverse and you can build them up pretty easy to make a lot of power.
    See them going cheap quite often(compared to the KTMs anyway).
    And wouldn’t require fabrication of mounts and who knows what else, unless your into that...if so than o vote 300 2 stroke! Lol
    The 525 motor requires modification to the lower frame mount if putting it in a SX frame. Also make sure it's from the straight axle machines, not the IRS model. Can get a lot of power from the RFS (450/525XC) engine platform, but it's just different. They'll never have the top end overrev that the SX engines have.

    If I ever do an engine swap it will be with the new generation FI 450 SXF motor or a 300 SX spec two stroke. Performance being 1st priority.
    Grapride likes this.
    Mine:
    2017 Husky FX 450
    2009 505 SX
    2008 525 XC-modded for mx (currently 450 cylinder)
    Dad's:
    2009 450 SX
    2008 450 XC
    2008 540 XC

  9. #8
    Junior Member Rookie
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    Not particularly but you could try looking it up on eBay.


 

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