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  1. #1

    98 Kawasaki 1100 stx

    Hello all..I got this jet ski with piston one seized totally. Pulled the motor out inspected every thing and found water in the crank case and also there were sand in the cooling passage. I am guessing the motor over heated for some reason. I am posting the pictures of the piston so that you guys can tell whats wrong with it. The piston has 25 marking on the side so someone rebuild the motor before.

    Questions : I banged on the wrist pin real hard several times to get the seized wrist pin out of the rod..Will it damage the crank bearings? I can feel some play in all three rods and the crank doesn't rotate freely. Is it normal to have any play on the rod bearing?

    Any suggestion on how to open the crank case (top half and bottom half) removed all the bolts but seems like something is holding it.



    regards

    Sameer
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  2. #2
    theres sealant holding together you need to take all the bolts out and pry the halfs apart, i recommend taking the flywheel and coupler off now too...

  3. #3
    steve45's Avatar
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    Wow! Serious meltdown. Don't bang on the wrist pin, use a puller. You can make one from a threaded rod and large, deep socket. Looks like detonation or very lean.

    If it had water in the crankcase, the crank is probably ruined, too.

  4. #4
    well its time to rebuild the motor from top to bottom. Any Suggestion please ? What is the best way to rebuild this motor? I want to bulletproof this thing. what after market head to choose ? (http://www.ebay.com/itm/96-97-98-99-...6dd9a5&vxp=mtr) can you guys please check this link and let me know what think.

  5. #5
    steve45's Avatar
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    Probably not a bad price for a rebuilt crank and Wiseco pistons, gaskets, etc. I don't use Wiseco, however. You can buy a factory NEW crank assembly for $903.

    I bought a complete 1100 engine on Ebay for $1175, shipped. It was used, but complete and in very good condition. Included carbs, exhaust, starter, oil pump--everything.

  6. #6
    What is the max bore i can go considering that its already .025 over bored? Forged piston or normal piston considering that i want to run high comp head?

  7. #7
    steve45's Avatar
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    Kawasaki sells .5 mm and 1.0 mm oversize pistons. I think I've seen larger aftermarket. I use Kawi pistons and stock heads.

  8. #8
    Thanx buddy

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