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Thread: SL conversions?

  1. #1
    Bay Rat cvbdrew's Avatar
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    SL conversions?

    I have a 94' SL650. What larger SL engines will bolt directly into my hull?... 700, 750, 780, 900???

    I'd love to see some conversions of this ski if anyone has links...

    thx,
    Drew


  2. #2
    ujustlost's Avatar
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    With the right parts u can put just about any motor u want in it. The 750 or 780 would be the best and easiest route.Here in michigan u can buy running 750 or 780 ski's for about a 1000. Hope this helps. Mike

  3. #3
    Moderator beerdart's Avatar
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    785 will also fit with some mods for the pipes..

    How about a V6 Merc??
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  4. #4
    Canadian Beaver Inspector jkindt's Avatar
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    650, 750, 780, and 785 all use the same basic crankcase. In fact the 650 and 750 are exactly the same and the 780 and 785 are 99% the same, just with some additional porting. You can turn a 650 into a 750 with new cylinders, pistons, and heads or vice-versa. There are many who have done this type of conversion, just check out the projects forum!

  5. #5
    ujustlost's Avatar
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    Quote Originally Posted by jkindt View Post
    650, 750, 780, and 785 all use the same basic crankcase. In fact the 650 and 750 are exactly the same and the 780 and 785 are 99% the same, just with some additional porting. You can turn a 650 into a 750 with new cylinders, pistons, and heads or vice-versa. There are many who have done this type of conversion, just check out the projects forum!
    I believe the porting on the 780 and 785's are the same. You would have to drill and tap a second port for the extra pulse line on the lower case.

  6. #6
    Canadian Beaver Inspector jkindt's Avatar
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    The main point is that any of those engines will physically bolt right in. There are few other changes that would need to be made, but nothing would need to be fabricated, parts are available.

  7. #7
    Moderator beerdart's Avatar
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    Quote Originally Posted by ujustlost View Post
    I believe the porting on the 780 and 785's are the same. You would have to drill and tap a second port for the extra pulse line on the lower case.
    1999 and 2000 785's had the reed spacer as part of the crankcase.

  8. #8
    Moderator beerdart's Avatar
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    Quote Originally Posted by jkindt View Post
    The main point is that any of those engines will physically bolt right in. There are few other changes that would need to be made, but nothing would need to be fabricated, parts are available.
    Yep.
    http://s113.photobucket.com/albums/n204/beerdart/?action=view&current=CIMG3580.flv

  9. #9
    ujustlost's Avatar
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    Quote Originally Posted by jkindt View Post
    The main point is that any of those engines will physically bolt right in. There are few other changes that would need to be made, but nothing would need to be fabricated, parts are available.
    +1

  10. #10
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Everything they said can be done ^^^^^^.

    But for a simple swap of engines, the 780 would be the largest direct replacement.

    Technically, all you really need to do is swap flywheel, stator, CDI, pistons, cyls, heads, exh manifold, carb jets, and impeller.

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