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  1. #1
    Appologizes for the last user title katz1002's Avatar
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    650 to 750 top end

    How much would take to use my 650 crank case and convert the jugs and pistons to a 750 is it possible for that matter


  2. #2
    Canadian Beaver Inspector jkindt's Avatar
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    You would need:

    750 Cylinders
    750 Pistons
    750 Heads
    Gaskets
    Carb jets
    Better F/A
    Impeller

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by katz1002 View Post
    How much would take to use my 650 crank case and convert the jugs and pistons to a 750 is it possible for that matter
    The 650 and 750 are identical except for the cyls, heads, elec stator, CDI, and impeller.

    You CANNOT bore 650 cyls out to fit 750 pistons.

    The carbs will need to be rejetted, but you can EASILY convert a 650 to 750.

    Matter of fact, I have 750 cyls and heads for sale. Also have some pistons if interested.

  4. #4
    Canadian Beaver Inspector jkindt's Avatar
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    I would not be comfortable putting a lot of money into your motor if it has rust on the crank bearings as you said in another thread! You dont want to throw out a crank bearing, lose a rod or two and wreck your new top end. BUT if you are going to do it anyways, I would talk to Xlint89, he has the parts you want and is a great guy to deal with.

  5. #5
    Appologizes for the last user title katz1002's Avatar
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    if anyone has the parts listed above pm me and we can negotiate ill have about 600 over xmas so hopefully we can strike a deal ALSO could i get my block machined and new bearings to get the rust out oh i wanna go performance ride plate and maybe performance impeller too i also need rods

    maybe get everything polished and balaned eh
    Last edited by katz1002; 12-14-2009 at 12:15 AM. Reason: spelling

  6. #6
    Appologizes for the last user title katz1002's Avatar
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    6 views and 5 post yall are wonderful people

  7. #7
    Canadian Beaver Inspector jkindt's Avatar
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    Alright. Slow down a little. Have you taken this engine apart yet? The bearings on the crank are not like a 4 stroke motors bearings. You dont generally 'machine' the crankcase and go with oversize bearings like you do with 4 stroke engines. The bearings used on these cranks are standard 6203 open bearings (and one 6307nr) that are pressed onto the multi piece crankshaft by a machinist. Rebuilding one requires special equipment. I would pull it out of the ski and pull the crank out if you suspect bearing damage. What lead you to believe there was rust in the crank?

  8. #8
    bowsniper's Avatar
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    I have a nice 750 short block. just one thing is wrong with it, the 1 rod (pto) hangs up a little on the crank bearing but the rod is straight. you could get that repaired and be ready for jugs and pistons!. 150.00 It has the engine plate, the stator cover, stator on it already, wires are there all ready to be wired up. Crank spins awesome except for the one litlle hang up. see what the others think.


    Yep! see that ski to your left? it's IN MY DRIVEWAY Now! It's here!!! woohoo!!

  9. #9
    Appologizes for the last user title katz1002's Avatar
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    have you seen my youtube video of the watery oil in the crank case and the rusty rods

  10. #10
    bowsniper's Avatar
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    I had about a qt of that milky stuff in my 750sl. I put the motor in my slt. runs good!.
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